Guzzler
10-28-2009, 01:54 PM
#1
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Year: 1988
Model: Cherokee
Engine: 4.0 Renix I6
Guzzler
Ok, my 88 is getting 10mpg lately!
Ran seafoam.
I replaced the oxygen sensor, and adjusted the tps,
also checked/moved the air temp sensor to the airbox,
but no improvment. (maybe should replace that one too)
should I look to the coolant temp sensor, and fuel pump next?
Run more seafoam?
Ran seafoam.
I replaced the oxygen sensor, and adjusted the tps,
also checked/moved the air temp sensor to the airbox,
but no improvment. (maybe should replace that one too)
should I look to the coolant temp sensor, and fuel pump next?
Run more seafoam?
10-28-2009, 02:07 PM
#3
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Year: 1988
Model: Cherokee
Engine: 4.0 Renix I6
Its a manual trans. I just filled it with redline.
No leaks, besides I don't think any leaks would account for this much usage
it sounds like a sensor is bad, or telling it to dump fuel.
I'm going to keep replacing stuff, just wanted to know what ppl thought about next thing to go on.
Update: I'm going out to double check on the leak idea
No leaks, besides I don't think any leaks would account for this much usage
it sounds like a sensor is bad, or telling it to dump fuel.
I'm going to keep replacing stuff, just wanted to know what ppl thought about next thing to go on.
Update: I'm going out to double check on the leak idea
Last edited by fallenknight308; 10-28-2009 at 02:10 PM.
10-28-2009, 02:49 PM
#5
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Year: 1988
Model: Cherokee
Engine: 4.0 Renix I6
Yeah, it does that sometimes, it also "searches" as it idles I.E. it fluctuates.
at idle. I read some where to disco the idle stepper control, but I did that and though it idles nice and low now (rumply-bump)
this did not improve the mileage problem.
Any RENIX guys wanna jump in too? lol
at idle. I read some where to disco the idle stepper control, but I did that and though it idles nice and low now (rumply-bump)
this did not improve the mileage problem.
Any RENIX guys wanna jump in too? lol
10-28-2009, 02:52 PM
#6
Yeah, it does that sometimes, it also "searches" as it idles I.E. it fluctuates.
at idle. I read some where to disco the idle stepper control, but I did that and though it idles nice and low now (rumply-bump)
this did not improve the mileage problem.
Any RENIX guys wanna jump in too? lol
at idle. I read some where to disco the idle stepper control, but I did that and though it idles nice and low now (rumply-bump)
this did not improve the mileage problem.
Any RENIX guys wanna jump in too? lol
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10-28-2009, 02:59 PM
#8
11-01-2009, 04:24 AM
#11
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Year: 1988
Model: Cherokee
Engine: 4.0 Renix I6
HELLO? 
Guess I'm on my own with this one..............
Guess I'm on my own with this one..............
Last edited by fallenknight308; 11-01-2009 at 04:26 AM.
11-01-2009, 10:58 AM
#13
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Year: 1997
Model: Cherokee
Engine: 4.0
Just Empty Every Pocket
Well mine went from 17 to 12 when my cat was about to take a dump along with my CPS I also needed a new fuel filter, but I don't know anything a bout RENIX sorry.
Well mine went from 17 to 12 when my cat was about to take a dump along with my CPS I also needed a new fuel filter, but I don't know anything a bout RENIX sorry.
11-01-2009, 02:05 PM
#14
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Year: 1988
Model: Cherokee
Engine: 4.0 Renix I6
Hey thanks! 
I have not tried the coolant sensor yet, but I will.
And thanks for the all the advice.
Regarding the cat/cps I'm putting new exhaust in soon, so might as well replace cat. and might as well replace cps.....cheap insurance.
I have not tried the coolant sensor yet, but I will.
And thanks for the all the advice.
Regarding the cat/cps I'm putting new exhaust in soon, so might as well replace cat. and might as well replace cps.....cheap insurance.
