Lost top end power in 88 Cherokee 4.0.
#111
Guest
Posts: n/a
Re: Lost top end power in 88 Cherokee 4.0.
There you go again, from the biggest loser of them all! The jealous,
really jealous, I can't believe how jealous this little draft dodging coward
schizophrenic psychopath liar hiding in Vancouver via
S0106000ea6ba70e7.vn.shawcable.net 24.86.24.251 intrepidator@shaw.ca who's
only way to get attention is to make a fool of it's self. With an obsession
with perverts and goats, where it writes via remailers, and cross posts to
other perverts to no one's surprise. With extreme jealous ranting over my
documents, possessions, successes, manliness and super Southern California
body. Committing forgery over many of them proving I'm a responsible
American man. You remind me of a little rat dog, like a Mexican Chiwawa with
it's senseless barking, me too, me too. You're even more senile than I first
thought. And the poor thing, you're too girlie to take responsibility for
yourself again, by signing your statement like a man.
You're not worth any more time when a cut and paste this same paragraph
it fits so well!
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
"Jesus H. Chrysler, Esq." <jc@heaven.xxx.net> wrote in message
news:evx6i.230431$DE1.102887@pd7urf2no...
>
> And you are wrong.
>
> Again.
>
>
>
> [insert blather here]
--
Posted via a free Usenet account from http://www.teranews.com
really jealous, I can't believe how jealous this little draft dodging coward
schizophrenic psychopath liar hiding in Vancouver via
S0106000ea6ba70e7.vn.shawcable.net 24.86.24.251 intrepidator@shaw.ca who's
only way to get attention is to make a fool of it's self. With an obsession
with perverts and goats, where it writes via remailers, and cross posts to
other perverts to no one's surprise. With extreme jealous ranting over my
documents, possessions, successes, manliness and super Southern California
body. Committing forgery over many of them proving I'm a responsible
American man. You remind me of a little rat dog, like a Mexican Chiwawa with
it's senseless barking, me too, me too. You're even more senile than I first
thought. And the poor thing, you're too girlie to take responsibility for
yourself again, by signing your statement like a man.
You're not worth any more time when a cut and paste this same paragraph
it fits so well!
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
"Jesus H. Chrysler, Esq." <jc@heaven.xxx.net> wrote in message
news:evx6i.230431$DE1.102887@pd7urf2no...
>
> And you are wrong.
>
> Again.
>
>
>
> [insert blather here]
--
Posted via a free Usenet account from http://www.teranews.com
#112
Guest
Posts: n/a
Re: Lost top end power in 88 Cherokee 4.0.
There you go again, from the biggest loser of them all! The jealous,
really jealous, I can't believe how jealous this little draft dodging coward
schizophrenic psychopath liar hiding in Vancouver via
S0106000ea6ba70e7.vn.shawcable.net 24.86.24.251 intrepidator@shaw.ca who's
only way to get attention is to make a fool of it's self. With an obsession
with perverts and goats, where it writes via remailers, and cross posts to
other perverts to no one's surprise. With extreme jealous ranting over my
documents, possessions, successes, manliness and super Southern California
body. Committing forgery over many of them proving I'm a responsible
American man. You remind me of a little rat dog, like a Mexican Chiwawa with
it's senseless barking, me too, me too. You're even more senile than I first
thought. And the poor thing, you're too girlie to take responsibility for
yourself again, by signing your statement like a man.
You're not worth any more time when a cut and paste this same paragraph
it fits so well!
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
"Jesus H. Chrysler, Esq." <jc@heaven.xxx.net> wrote in message
news:evx6i.230431$DE1.102887@pd7urf2no...
>
> And you are wrong.
>
> Again.
>
>
>
> [insert blather here]
--
Posted via a free Usenet account from http://www.teranews.com
really jealous, I can't believe how jealous this little draft dodging coward
schizophrenic psychopath liar hiding in Vancouver via
S0106000ea6ba70e7.vn.shawcable.net 24.86.24.251 intrepidator@shaw.ca who's
only way to get attention is to make a fool of it's self. With an obsession
with perverts and goats, where it writes via remailers, and cross posts to
other perverts to no one's surprise. With extreme jealous ranting over my
documents, possessions, successes, manliness and super Southern California
body. Committing forgery over many of them proving I'm a responsible
American man. You remind me of a little rat dog, like a Mexican Chiwawa with
it's senseless barking, me too, me too. You're even more senile than I first
thought. And the poor thing, you're too girlie to take responsibility for
yourself again, by signing your statement like a man.
You're not worth any more time when a cut and paste this same paragraph
it fits so well!
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
"Jesus H. Chrysler, Esq." <jc@heaven.xxx.net> wrote in message
news:evx6i.230431$DE1.102887@pd7urf2no...
>
> And you are wrong.
>
> Again.
>
>
>
> [insert blather here]
--
Posted via a free Usenet account from http://www.teranews.com
#113
Guest
Posts: n/a
Re: Lost top end power in 88 Cherokee 4.0.
There you go again, from the biggest loser of them all! The jealous,
really jealous, I can't believe how jealous this little draft dodging coward
schizophrenic psychopath liar hiding in Vancouver via
S0106000ea6ba70e7.vn.shawcable.net 24.86.24.251 intrepidator@shaw.ca who's
only way to get attention is to make a fool of it's self. With an obsession
with perverts and goats, where it writes via remailers, and cross posts to
other perverts to no one's surprise. With extreme jealous ranting over my
documents, possessions, successes, manliness and super Southern California
body. Committing forgery over many of them proving I'm a responsible
American man. You remind me of a little rat dog, like a Mexican Chiwawa with
it's senseless barking, me too, me too. You're even more senile than I first
thought. And the poor thing, you're too girlie to take responsibility for
yourself again, by signing your statement like a man.
You're not worth any more time when a cut and paste this same paragraph
it fits so well!
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
"Jesus H. Chrysler, Esq." <jc@heaven.xxx.net> wrote in message
news:evx6i.230431$DE1.102887@pd7urf2no...
>
> And you are wrong.
>
> Again.
>
>
>
> [insert blather here]
--
Posted via a free Usenet account from http://www.teranews.com
really jealous, I can't believe how jealous this little draft dodging coward
schizophrenic psychopath liar hiding in Vancouver via
S0106000ea6ba70e7.vn.shawcable.net 24.86.24.251 intrepidator@shaw.ca who's
only way to get attention is to make a fool of it's self. With an obsession
with perverts and goats, where it writes via remailers, and cross posts to
other perverts to no one's surprise. With extreme jealous ranting over my
documents, possessions, successes, manliness and super Southern California
body. Committing forgery over many of them proving I'm a responsible
American man. You remind me of a little rat dog, like a Mexican Chiwawa with
it's senseless barking, me too, me too. You're even more senile than I first
thought. And the poor thing, you're too girlie to take responsibility for
yourself again, by signing your statement like a man.
You're not worth any more time when a cut and paste this same paragraph
it fits so well!
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
"Jesus H. Chrysler, Esq." <jc@heaven.xxx.net> wrote in message
news:evx6i.230431$DE1.102887@pd7urf2no...
>
> And you are wrong.
>
> Again.
>
>
>
> [insert blather here]
--
Posted via a free Usenet account from http://www.teranews.com
#114
Guest
Posts: n/a
Re: Lost top end power in 88 Cherokee 4.0.- Update
Mike Romain wrote:
> bllsht wrote:
>
>>
>> The anti drain back check valve in the pump will make it difficult, if
>> not impossible to blow back through the pump. However, if it's easy to
>> blow back through it would indicate the the rubber hose from the pump
>> to the sending unit outlet has come loose or failed. Very common and
>> most likely cause of the problem you describe.
>>
>> You could also be describing an ignition coil failure. Even if your
>> measurements look good, and it appears to create a strong spark, it
>> could still be shorted internally, causing your problem under load.
>> You'd need a scope to see it though.
>>
>>
>
> Nice try, thanks.
>
> The pump holds blow back pressure.
>
> It didn't have any pressure when the filter was unhooked though....
>
> If the spark was messed, I would think I would see dirty plugs, not
> perfect wear ones....
>
> Do you or does anyone know if there a return line pressure valve on this
> 88 4.0 or is it just a metered hole?
>
> I am thinking about pinching off the return line to see what happens....
Mike, a $15 fuel pressure guage set would have already saved you that much
in irritation! A borrowed freebie would have been even better. I have the
MPI manual for the Renix setup (87-90 or so) and it give a cookbook
sequence that is pretty sure to identify about any fuel delivery problem.
If it weren't for the bleed down check (how much it drops in 20 minutes)
you could be done in 15 minutes.
Be VERY careful pinching off that return line w/o a guage! Even with a
failing pump it would hit over 90 PSI inside a few seconds and that will
definitely blow hoses, especially as old as ours are. The second is that
the return line comes off the front end of the fuel rail and it's a metal
pipe until it gets way down into the works - hard to reach and control -
plus it is very likely old and ready to crack as soon as you pinch it. If
you do this, pinch the line, have someone turn the key on and be ready to
quickly turn it off. You really do need to scrounge up a guage. Until I
found what I wanted, I cobbled one out of a cheap 0-100 PSI water guage I
had laying around.
--
Will Honea
> bllsht wrote:
>
>>
>> The anti drain back check valve in the pump will make it difficult, if
>> not impossible to blow back through the pump. However, if it's easy to
>> blow back through it would indicate the the rubber hose from the pump
>> to the sending unit outlet has come loose or failed. Very common and
>> most likely cause of the problem you describe.
>>
>> You could also be describing an ignition coil failure. Even if your
>> measurements look good, and it appears to create a strong spark, it
>> could still be shorted internally, causing your problem under load.
>> You'd need a scope to see it though.
>>
>>
>
> Nice try, thanks.
>
> The pump holds blow back pressure.
>
> It didn't have any pressure when the filter was unhooked though....
>
> If the spark was messed, I would think I would see dirty plugs, not
> perfect wear ones....
>
> Do you or does anyone know if there a return line pressure valve on this
> 88 4.0 or is it just a metered hole?
>
> I am thinking about pinching off the return line to see what happens....
Mike, a $15 fuel pressure guage set would have already saved you that much
in irritation! A borrowed freebie would have been even better. I have the
MPI manual for the Renix setup (87-90 or so) and it give a cookbook
sequence that is pretty sure to identify about any fuel delivery problem.
If it weren't for the bleed down check (how much it drops in 20 minutes)
you could be done in 15 minutes.
Be VERY careful pinching off that return line w/o a guage! Even with a
failing pump it would hit over 90 PSI inside a few seconds and that will
definitely blow hoses, especially as old as ours are. The second is that
the return line comes off the front end of the fuel rail and it's a metal
pipe until it gets way down into the works - hard to reach and control -
plus it is very likely old and ready to crack as soon as you pinch it. If
you do this, pinch the line, have someone turn the key on and be ready to
quickly turn it off. You really do need to scrounge up a guage. Until I
found what I wanted, I cobbled one out of a cheap 0-100 PSI water guage I
had laying around.
--
Will Honea
#115
Guest
Posts: n/a
Re: Lost top end power in 88 Cherokee 4.0.- Update
Mike Romain wrote:
> bllsht wrote:
>
>>
>> The anti drain back check valve in the pump will make it difficult, if
>> not impossible to blow back through the pump. However, if it's easy to
>> blow back through it would indicate the the rubber hose from the pump
>> to the sending unit outlet has come loose or failed. Very common and
>> most likely cause of the problem you describe.
>>
>> You could also be describing an ignition coil failure. Even if your
>> measurements look good, and it appears to create a strong spark, it
>> could still be shorted internally, causing your problem under load.
>> You'd need a scope to see it though.
>>
>>
>
> Nice try, thanks.
>
> The pump holds blow back pressure.
>
> It didn't have any pressure when the filter was unhooked though....
>
> If the spark was messed, I would think I would see dirty plugs, not
> perfect wear ones....
>
> Do you or does anyone know if there a return line pressure valve on this
> 88 4.0 or is it just a metered hole?
>
> I am thinking about pinching off the return line to see what happens....
Mike, a $15 fuel pressure guage set would have already saved you that much
in irritation! A borrowed freebie would have been even better. I have the
MPI manual for the Renix setup (87-90 or so) and it give a cookbook
sequence that is pretty sure to identify about any fuel delivery problem.
If it weren't for the bleed down check (how much it drops in 20 minutes)
you could be done in 15 minutes.
Be VERY careful pinching off that return line w/o a guage! Even with a
failing pump it would hit over 90 PSI inside a few seconds and that will
definitely blow hoses, especially as old as ours are. The second is that
the return line comes off the front end of the fuel rail and it's a metal
pipe until it gets way down into the works - hard to reach and control -
plus it is very likely old and ready to crack as soon as you pinch it. If
you do this, pinch the line, have someone turn the key on and be ready to
quickly turn it off. You really do need to scrounge up a guage. Until I
found what I wanted, I cobbled one out of a cheap 0-100 PSI water guage I
had laying around.
--
Will Honea
> bllsht wrote:
>
>>
>> The anti drain back check valve in the pump will make it difficult, if
>> not impossible to blow back through the pump. However, if it's easy to
>> blow back through it would indicate the the rubber hose from the pump
>> to the sending unit outlet has come loose or failed. Very common and
>> most likely cause of the problem you describe.
>>
>> You could also be describing an ignition coil failure. Even if your
>> measurements look good, and it appears to create a strong spark, it
>> could still be shorted internally, causing your problem under load.
>> You'd need a scope to see it though.
>>
>>
>
> Nice try, thanks.
>
> The pump holds blow back pressure.
>
> It didn't have any pressure when the filter was unhooked though....
>
> If the spark was messed, I would think I would see dirty plugs, not
> perfect wear ones....
>
> Do you or does anyone know if there a return line pressure valve on this
> 88 4.0 or is it just a metered hole?
>
> I am thinking about pinching off the return line to see what happens....
Mike, a $15 fuel pressure guage set would have already saved you that much
in irritation! A borrowed freebie would have been even better. I have the
MPI manual for the Renix setup (87-90 or so) and it give a cookbook
sequence that is pretty sure to identify about any fuel delivery problem.
If it weren't for the bleed down check (how much it drops in 20 minutes)
you could be done in 15 minutes.
Be VERY careful pinching off that return line w/o a guage! Even with a
failing pump it would hit over 90 PSI inside a few seconds and that will
definitely blow hoses, especially as old as ours are. The second is that
the return line comes off the front end of the fuel rail and it's a metal
pipe until it gets way down into the works - hard to reach and control -
plus it is very likely old and ready to crack as soon as you pinch it. If
you do this, pinch the line, have someone turn the key on and be ready to
quickly turn it off. You really do need to scrounge up a guage. Until I
found what I wanted, I cobbled one out of a cheap 0-100 PSI water guage I
had laying around.
--
Will Honea
#116
Guest
Posts: n/a
Re: Lost top end power in 88 Cherokee 4.0.- Update
Mike Romain wrote:
> bllsht wrote:
>
>>
>> The anti drain back check valve in the pump will make it difficult, if
>> not impossible to blow back through the pump. However, if it's easy to
>> blow back through it would indicate the the rubber hose from the pump
>> to the sending unit outlet has come loose or failed. Very common and
>> most likely cause of the problem you describe.
>>
>> You could also be describing an ignition coil failure. Even if your
>> measurements look good, and it appears to create a strong spark, it
>> could still be shorted internally, causing your problem under load.
>> You'd need a scope to see it though.
>>
>>
>
> Nice try, thanks.
>
> The pump holds blow back pressure.
>
> It didn't have any pressure when the filter was unhooked though....
>
> If the spark was messed, I would think I would see dirty plugs, not
> perfect wear ones....
>
> Do you or does anyone know if there a return line pressure valve on this
> 88 4.0 or is it just a metered hole?
>
> I am thinking about pinching off the return line to see what happens....
Mike, a $15 fuel pressure guage set would have already saved you that much
in irritation! A borrowed freebie would have been even better. I have the
MPI manual for the Renix setup (87-90 or so) and it give a cookbook
sequence that is pretty sure to identify about any fuel delivery problem.
If it weren't for the bleed down check (how much it drops in 20 minutes)
you could be done in 15 minutes.
Be VERY careful pinching off that return line w/o a guage! Even with a
failing pump it would hit over 90 PSI inside a few seconds and that will
definitely blow hoses, especially as old as ours are. The second is that
the return line comes off the front end of the fuel rail and it's a metal
pipe until it gets way down into the works - hard to reach and control -
plus it is very likely old and ready to crack as soon as you pinch it. If
you do this, pinch the line, have someone turn the key on and be ready to
quickly turn it off. You really do need to scrounge up a guage. Until I
found what I wanted, I cobbled one out of a cheap 0-100 PSI water guage I
had laying around.
--
Will Honea
> bllsht wrote:
>
>>
>> The anti drain back check valve in the pump will make it difficult, if
>> not impossible to blow back through the pump. However, if it's easy to
>> blow back through it would indicate the the rubber hose from the pump
>> to the sending unit outlet has come loose or failed. Very common and
>> most likely cause of the problem you describe.
>>
>> You could also be describing an ignition coil failure. Even if your
>> measurements look good, and it appears to create a strong spark, it
>> could still be shorted internally, causing your problem under load.
>> You'd need a scope to see it though.
>>
>>
>
> Nice try, thanks.
>
> The pump holds blow back pressure.
>
> It didn't have any pressure when the filter was unhooked though....
>
> If the spark was messed, I would think I would see dirty plugs, not
> perfect wear ones....
>
> Do you or does anyone know if there a return line pressure valve on this
> 88 4.0 or is it just a metered hole?
>
> I am thinking about pinching off the return line to see what happens....
Mike, a $15 fuel pressure guage set would have already saved you that much
in irritation! A borrowed freebie would have been even better. I have the
MPI manual for the Renix setup (87-90 or so) and it give a cookbook
sequence that is pretty sure to identify about any fuel delivery problem.
If it weren't for the bleed down check (how much it drops in 20 minutes)
you could be done in 15 minutes.
Be VERY careful pinching off that return line w/o a guage! Even with a
failing pump it would hit over 90 PSI inside a few seconds and that will
definitely blow hoses, especially as old as ours are. The second is that
the return line comes off the front end of the fuel rail and it's a metal
pipe until it gets way down into the works - hard to reach and control -
plus it is very likely old and ready to crack as soon as you pinch it. If
you do this, pinch the line, have someone turn the key on and be ready to
quickly turn it off. You really do need to scrounge up a guage. Until I
found what I wanted, I cobbled one out of a cheap 0-100 PSI water guage I
had laying around.
--
Will Honea
#117
Guest
Posts: n/a
Re: Lost top end power in 88 Cherokee 4.0.- Update
Mike Romain wrote:
> bllsht wrote:
>
>>
>> The anti drain back check valve in the pump will make it difficult, if
>> not impossible to blow back through the pump. However, if it's easy to
>> blow back through it would indicate the the rubber hose from the pump
>> to the sending unit outlet has come loose or failed. Very common and
>> most likely cause of the problem you describe.
>>
>> You could also be describing an ignition coil failure. Even if your
>> measurements look good, and it appears to create a strong spark, it
>> could still be shorted internally, causing your problem under load.
>> You'd need a scope to see it though.
>>
>>
>
> Nice try, thanks.
>
> The pump holds blow back pressure.
>
> It didn't have any pressure when the filter was unhooked though....
>
> If the spark was messed, I would think I would see dirty plugs, not
> perfect wear ones....
>
> Do you or does anyone know if there a return line pressure valve on this
> 88 4.0 or is it just a metered hole?
>
> I am thinking about pinching off the return line to see what happens....
Mike, a $15 fuel pressure guage set would have already saved you that much
in irritation! A borrowed freebie would have been even better. I have the
MPI manual for the Renix setup (87-90 or so) and it give a cookbook
sequence that is pretty sure to identify about any fuel delivery problem.
If it weren't for the bleed down check (how much it drops in 20 minutes)
you could be done in 15 minutes.
Be VERY careful pinching off that return line w/o a guage! Even with a
failing pump it would hit over 90 PSI inside a few seconds and that will
definitely blow hoses, especially as old as ours are. The second is that
the return line comes off the front end of the fuel rail and it's a metal
pipe until it gets way down into the works - hard to reach and control -
plus it is very likely old and ready to crack as soon as you pinch it. If
you do this, pinch the line, have someone turn the key on and be ready to
quickly turn it off. You really do need to scrounge up a guage. Until I
found what I wanted, I cobbled one out of a cheap 0-100 PSI water guage I
had laying around.
--
Will Honea
> bllsht wrote:
>
>>
>> The anti drain back check valve in the pump will make it difficult, if
>> not impossible to blow back through the pump. However, if it's easy to
>> blow back through it would indicate the the rubber hose from the pump
>> to the sending unit outlet has come loose or failed. Very common and
>> most likely cause of the problem you describe.
>>
>> You could also be describing an ignition coil failure. Even if your
>> measurements look good, and it appears to create a strong spark, it
>> could still be shorted internally, causing your problem under load.
>> You'd need a scope to see it though.
>>
>>
>
> Nice try, thanks.
>
> The pump holds blow back pressure.
>
> It didn't have any pressure when the filter was unhooked though....
>
> If the spark was messed, I would think I would see dirty plugs, not
> perfect wear ones....
>
> Do you or does anyone know if there a return line pressure valve on this
> 88 4.0 or is it just a metered hole?
>
> I am thinking about pinching off the return line to see what happens....
Mike, a $15 fuel pressure guage set would have already saved you that much
in irritation! A borrowed freebie would have been even better. I have the
MPI manual for the Renix setup (87-90 or so) and it give a cookbook
sequence that is pretty sure to identify about any fuel delivery problem.
If it weren't for the bleed down check (how much it drops in 20 minutes)
you could be done in 15 minutes.
Be VERY careful pinching off that return line w/o a guage! Even with a
failing pump it would hit over 90 PSI inside a few seconds and that will
definitely blow hoses, especially as old as ours are. The second is that
the return line comes off the front end of the fuel rail and it's a metal
pipe until it gets way down into the works - hard to reach and control -
plus it is very likely old and ready to crack as soon as you pinch it. If
you do this, pinch the line, have someone turn the key on and be ready to
quickly turn it off. You really do need to scrounge up a guage. Until I
found what I wanted, I cobbled one out of a cheap 0-100 PSI water guage I
had laying around.
--
Will Honea
#118
Guest
Posts: n/a
Re: Lost top end power in 88 Cherokee 4.0.
On May 27, 11:20 am, Mike Romain <roma...@sympatico.ca> wrote:
> Ok, I am on a fishing expedition for likely things to check.
>
> Our 88 Cherokee with the 4.0 has lost power above half throttle. It
> goes fine up to that point, then just bogs, no matter what gear it is
> in. It has been neglected for 4 years as far as tuning goes due to me
> not being up to it.
>
> I first changed out the 'very' dirty distributor cap and rotor which
> made starting 'much' faster and smoother.
>
> I then changed the gas filter because it was once again rusted to the
> rot point after about 8 years.
>
> Air filter is new.
>
> I cleaned the connections on the TPS and IAC and verified the TPS
> doesn't have any 'dead' spots with my meter.
>
> I cleaned the CPS and coil connections also.
>
> No joy on any of that.
>
> I have been having some cold idle issues and have been thinking on
> cleaning the IAC, but don't know if that will have a top end effect or not.
>
> I am also thinking on unplugging the EGR just to make sure it isn't
> blown vacuum wise because it only bogs under throttle when things like
> the EGR are active.
>
> Any other ideas?
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> (More Off Road album links at bottom of the view page)
> Ok, I am on a fishing expedition for likely things to check.
>
> Our 88 Cherokee with the 4.0 has lost power above half throttle. It
> goes fine up to that point, then just bogs, no matter what gear it is
> in. It has been neglected for 4 years as far as tuning goes due to me
> not being up to it.
>
> I first changed out the 'very' dirty distributor cap and rotor which
> made starting 'much' faster and smoother.
>
> I then changed the gas filter because it was once again rusted to the
> rot point after about 8 years.
>
> Air filter is new.
>
> I cleaned the connections on the TPS and IAC and verified the TPS
> doesn't have any 'dead' spots with my meter.
>
> I cleaned the CPS and coil connections also.
>
> No joy on any of that.
>
> I have been having some cold idle issues and have been thinking on
> cleaning the IAC, but don't know if that will have a top end effect or not.
>
> I am also thinking on unplugging the EGR just to make sure it isn't
> blown vacuum wise because it only bogs under throttle when things like
> the EGR are active.
>
> Any other ideas?
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> (More Off Road album links at bottom of the view page)
#119
Guest
Posts: n/a
Re: Lost top end power in 88 Cherokee 4.0.
On May 27, 11:20 am, Mike Romain <roma...@sympatico.ca> wrote:
> Ok, I am on a fishing expedition for likely things to check.
>
> Our 88 Cherokee with the 4.0 has lost power above half throttle. It
> goes fine up to that point, then just bogs, no matter what gear it is
> in. It has been neglected for 4 years as far as tuning goes due to me
> not being up to it.
>
> I first changed out the 'very' dirty distributor cap and rotor which
> made starting 'much' faster and smoother.
>
> I then changed the gas filter because it was once again rusted to the
> rot point after about 8 years.
>
> Air filter is new.
>
> I cleaned the connections on the TPS and IAC and verified the TPS
> doesn't have any 'dead' spots with my meter.
>
> I cleaned the CPS and coil connections also.
>
> No joy on any of that.
>
> I have been having some cold idle issues and have been thinking on
> cleaning the IAC, but don't know if that will have a top end effect or not.
>
> I am also thinking on unplugging the EGR just to make sure it isn't
> blown vacuum wise because it only bogs under throttle when things like
> the EGR are active.
>
> Any other ideas?
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> (More Off Road album links at bottom of the view page)
> Ok, I am on a fishing expedition for likely things to check.
>
> Our 88 Cherokee with the 4.0 has lost power above half throttle. It
> goes fine up to that point, then just bogs, no matter what gear it is
> in. It has been neglected for 4 years as far as tuning goes due to me
> not being up to it.
>
> I first changed out the 'very' dirty distributor cap and rotor which
> made starting 'much' faster and smoother.
>
> I then changed the gas filter because it was once again rusted to the
> rot point after about 8 years.
>
> Air filter is new.
>
> I cleaned the connections on the TPS and IAC and verified the TPS
> doesn't have any 'dead' spots with my meter.
>
> I cleaned the CPS and coil connections also.
>
> No joy on any of that.
>
> I have been having some cold idle issues and have been thinking on
> cleaning the IAC, but don't know if that will have a top end effect or not.
>
> I am also thinking on unplugging the EGR just to make sure it isn't
> blown vacuum wise because it only bogs under throttle when things like
> the EGR are active.
>
> Any other ideas?
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> (More Off Road album links at bottom of the view page)
#120
Guest
Posts: n/a
Re: Lost top end power in 88 Cherokee 4.0.
On May 27, 11:20 am, Mike Romain <roma...@sympatico.ca> wrote:
> Ok, I am on a fishing expedition for likely things to check.
>
> Our 88 Cherokee with the 4.0 has lost power above half throttle. It
> goes fine up to that point, then just bogs, no matter what gear it is
> in. It has been neglected for 4 years as far as tuning goes due to me
> not being up to it.
>
> I first changed out the 'very' dirty distributor cap and rotor which
> made starting 'much' faster and smoother.
>
> I then changed the gas filter because it was once again rusted to the
> rot point after about 8 years.
>
> Air filter is new.
>
> I cleaned the connections on the TPS and IAC and verified the TPS
> doesn't have any 'dead' spots with my meter.
>
> I cleaned the CPS and coil connections also.
>
> No joy on any of that.
>
> I have been having some cold idle issues and have been thinking on
> cleaning the IAC, but don't know if that will have a top end effect or not.
>
> I am also thinking on unplugging the EGR just to make sure it isn't
> blown vacuum wise because it only bogs under throttle when things like
> the EGR are active.
>
> Any other ideas?
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> (More Off Road album links at bottom of the view page)
> Ok, I am on a fishing expedition for likely things to check.
>
> Our 88 Cherokee with the 4.0 has lost power above half throttle. It
> goes fine up to that point, then just bogs, no matter what gear it is
> in. It has been neglected for 4 years as far as tuning goes due to me
> not being up to it.
>
> I first changed out the 'very' dirty distributor cap and rotor which
> made starting 'much' faster and smoother.
>
> I then changed the gas filter because it was once again rusted to the
> rot point after about 8 years.
>
> Air filter is new.
>
> I cleaned the connections on the TPS and IAC and verified the TPS
> doesn't have any 'dead' spots with my meter.
>
> I cleaned the CPS and coil connections also.
>
> No joy on any of that.
>
> I have been having some cold idle issues and have been thinking on
> cleaning the IAC, but don't know if that will have a top end effect or not.
>
> I am also thinking on unplugging the EGR just to make sure it isn't
> blown vacuum wise because it only bogs under throttle when things like
> the EGR are active.
>
> Any other ideas?
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06http://www.imagestation.com/album/pictures.html?id=2115147590
> (More Off Road album links at bottom of the view page)