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)

Since you are just fishing... check the ignition coil input/output
coil voltages and the capacitor. Verify spark can jump a large gap
when engine is not running. Check this article:

http://mgaguru.com/mgtech/ignition/ig108.htm

Do you sense that there are "misses"?

I would still check the fuel pressure and the fuel presssure
regulator.

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)

Since you are just fishing... check the ignition coil input/output
coil voltages and the capacitor. Verify spark can jump a large gap
when engine is not running. Check this article:

http://mgaguru.com/mgtech/ignition/ig108.htm

Do you sense that there are "misses"?

I would still check the fuel pressure and the fuel presssure
regulator.

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)

Since you are just fishing... check the ignition coil input/output
coil voltages and the capacitor. Verify spark can jump a large gap
when engine is not running. Check this article:

http://mgaguru.com/mgtech/ignition/ig108.htm

Do you sense that there are "misses"?

I would still check the fuel pressure and the fuel presssure
regulator.

Re: Lost top end power in 88 Cherokee 4.0.
 

Yes Bill

I agree that it sounds like water in the float bowl, but I thought the
Canadian 88 4.0 was FI. Don't hesitate to tell me I am wrong.

Merrill

On May 27, 9:38 pm, "L.W. \(Bill\) ------ III" <billhug...@cox.net>
wrote:
> Water in your float bowl.
> God Bless America, Bill O|||||||O
> mailto:LW------...@aol.comhttp://www.----------.com/
>
> "Mike Romain" <roma...@sympatico.ca> wrote in message
>
> news:4659a194$0$3020$9a6e19ea@unlimited.newshostin g.com...
>
>
>
>
>
> > 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)
>
> --
> Posted via a free Usenet account fromhttp://www.teranews.com- Hide quoted text -
>
> - Show quoted text -

Re: Lost top end power in 88 Cherokee 4.0.
 

Yes Bill

I agree that it sounds like water in the float bowl, but I thought the
Canadian 88 4.0 was FI. Don't hesitate to tell me I am wrong.

Merrill

On May 27, 9:38 pm, "L.W. \(Bill\) ------ III" <billhug...@cox.net>
wrote:
> Water in your float bowl.
> God Bless America, Bill O|||||||O
> mailto:LW------...@aol.comhttp://www.----------.com/
>
> "Mike Romain" <roma...@sympatico.ca> wrote in message
>
> news:4659a194$0$3020$9a6e19ea@unlimited.newshostin g.com...
>
>
>
>
>
> > 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)
>
> --
> Posted via a free Usenet account fromhttp://www.teranews.com- Hide quoted text -
>
> - Show quoted text -

Re: Lost top end power in 88 Cherokee 4.0.
 

Yes Bill

I agree that it sounds like water in the float bowl, but I thought the
Canadian 88 4.0 was FI. Don't hesitate to tell me I am wrong.

Merrill

On May 27, 9:38 pm, "L.W. \(Bill\) ------ III" <billhug...@cox.net>
wrote:
> Water in your float bowl.
> God Bless America, Bill O|||||||O
> mailto:LW------...@aol.comhttp://www.----------.com/
>
> "Mike Romain" <roma...@sympatico.ca> wrote in message
>
> news:4659a194$0$3020$9a6e19ea@unlimited.newshostin g.com...
>
>
>
>
>
> > 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)
>
> --
> Posted via a free Usenet account fromhttp://www.teranews.com- Hide quoted text -
>
> - Show quoted text -

Re: Lost top end power in 88 Cherokee 4.0.
 

Yes Bill

I agree that it sounds like water in the float bowl, but I thought the
Canadian 88 4.0 was FI. Don't hesitate to tell me I am wrong.

Merrill

On May 27, 9:38 pm, "L.W. \(Bill\) ------ III" <billhug...@cox.net>
wrote:
> Water in your float bowl.
> God Bless America, Bill O|||||||O
> mailto:LW------...@aol.comhttp://www.----------.com/
>
> "Mike Romain" <roma...@sympatico.ca> wrote in message
>
> news:4659a194$0$3020$9a6e19ea@unlimited.newshostin g.com...
>
>
>
>
>
> > 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)
>
> --
> Posted via a free Usenet account fromhttp://www.teranews.com- Hide quoted text -
>
> - Show quoted text -

Re: Lost top end power in 88 Cherokee 4.0.
 

Hi Merrill,
I would seem so as all Ford and GMs were electronically injected by '83.
But Chrysler dances to a different tune, like this newer than a CJ, YJ:
http://home.sprynet.com/~dale02/list.htm
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

"merrill" <merrill@can.rogers.com> wrote in message
news:1180320853.088615.237200@m36g2000hse.googlegr oups.com...
> Yes Bill
>
> I agree that it sounds like water in the float bowl, but I thought the
> Canadian 88 4.0 was FI. Don't hesitate to tell me I am wrong.
>
> Merrill



--
Posted via a free Usenet account from http://www.teranews.com

Re: Lost top end power in 88 Cherokee 4.0.
 

Hi Merrill,
I would seem so as all Ford and GMs were electronically injected by '83.
But Chrysler dances to a different tune, like this newer than a CJ, YJ:
http://home.sprynet.com/~dale02/list.htm
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

"merrill" <merrill@can.rogers.com> wrote in message
news:1180320853.088615.237200@m36g2000hse.googlegr oups.com...
> Yes Bill
>
> I agree that it sounds like water in the float bowl, but I thought the
> Canadian 88 4.0 was FI. Don't hesitate to tell me I am wrong.
>
> Merrill



--
Posted via a free Usenet account from http://www.teranews.com

Re: Lost top end power in 88 Cherokee 4.0.
 

Hi Merrill,
I would seem so as all Ford and GMs were electronically injected by '83.
But Chrysler dances to a different tune, like this newer than a CJ, YJ:
http://home.sprynet.com/~dale02/list.htm
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

"merrill" <merrill@can.rogers.com> wrote in message
news:1180320853.088615.237200@m36g2000hse.googlegr oups.com...
> Yes Bill
>
> I agree that it sounds like water in the float bowl, but I thought the
> Canadian 88 4.0 was FI. Don't hesitate to tell me I am wrong.
>
> Merrill



--
Posted via a free Usenet account from http://www.teranews.com