Lost top end power in 88 Cherokee 4.0.
06-01-2007, 09:17 PM
#121
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)
06-01-2007, 09:27 PM
#122
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)
Mike, curious; what is the latest?
> 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)
Mike, curious; what is the latest?
06-01-2007, 09:27 PM
#123
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)
Mike, curious; what is the latest?
> 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)
Mike, curious; what is the latest?
06-01-2007, 09:27 PM
#124
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)
Mike, curious; what is the latest?
> 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)
Mike, curious; what is the latest?
06-01-2007, 09:27 PM
#125
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)
Mike, curious; what is the latest?
> 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)
Mike, curious; what is the latest?
06-01-2007, 10:02 PM
#126
Guest
Posts: n/a
Re: Lost top end power in 88 Cherokee 4.0.
stilllearning wrote:
> 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)
>
> Mike, curious; what is the latest?
>
The vehicle hasn't been here, it is used by my wife to go to work.
I might look more at it this weekend depending on rain.
There is one ratty coil to ignition module connection I want to address
and I want the fuel pump connection cleaned just in case.
Mike
> 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)
>
> Mike, curious; what is the latest?
>
The vehicle hasn't been here, it is used by my wife to go to work.
I might look more at it this weekend depending on rain.
There is one ratty coil to ignition module connection I want to address
and I want the fuel pump connection cleaned just in case.
Mike
06-01-2007, 10:02 PM
#127
Guest
Posts: n/a
Re: Lost top end power in 88 Cherokee 4.0.
stilllearning wrote:
> 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)
>
> Mike, curious; what is the latest?
>
The vehicle hasn't been here, it is used by my wife to go to work.
I might look more at it this weekend depending on rain.
There is one ratty coil to ignition module connection I want to address
and I want the fuel pump connection cleaned just in case.
Mike
> 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)
>
> Mike, curious; what is the latest?
>
The vehicle hasn't been here, it is used by my wife to go to work.
I might look more at it this weekend depending on rain.
There is one ratty coil to ignition module connection I want to address
and I want the fuel pump connection cleaned just in case.
Mike
06-01-2007, 10:02 PM
#128
Guest
Posts: n/a
Re: Lost top end power in 88 Cherokee 4.0.
stilllearning wrote:
> 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)
>
> Mike, curious; what is the latest?
>
The vehicle hasn't been here, it is used by my wife to go to work.
I might look more at it this weekend depending on rain.
There is one ratty coil to ignition module connection I want to address
and I want the fuel pump connection cleaned just in case.
Mike
> 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)
>
> Mike, curious; what is the latest?
>
The vehicle hasn't been here, it is used by my wife to go to work.
I might look more at it this weekend depending on rain.
There is one ratty coil to ignition module connection I want to address
and I want the fuel pump connection cleaned just in case.
Mike
06-01-2007, 10:02 PM
#129
Guest
Posts: n/a
Re: Lost top end power in 88 Cherokee 4.0.
stilllearning wrote:
> 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)
>
> Mike, curious; what is the latest?
>
The vehicle hasn't been here, it is used by my wife to go to work.
I might look more at it this weekend depending on rain.
There is one ratty coil to ignition module connection I want to address
and I want the fuel pump connection cleaned just in case.
Mike
> 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)
>
> Mike, curious; what is the latest?
>
The vehicle hasn't been here, it is used by my wife to go to work.
I might look more at it this weekend depending on rain.
There is one ratty coil to ignition module connection I want to address
and I want the fuel pump connection cleaned just in case.
Mike
06-03-2007, 10:54 AM
#130
Guest
Posts: n/a
Re: Lost top end power in 88 Cherokee 4.0... Solved
We solved our power loss problem.
RIP
88 Cherokee
316K km
We had a nice ten years together.
Don't even think there is enough metal left on it to make a new car door
once it's melted down....
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
RIP
88 Cherokee
316K km
We had a nice ten years together.
Don't even think there is enough metal left on it to make a new car door
once it's melted down....
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)