Running Rich
Thread Starter
Junior Member
Joined: Jul 2012
Posts: 99
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From: Succasunna NJ
Year: 1988
Model: Cherokee
Engine: 4.0

Can't see it that well, but I am pointing at the MAP line.. used plastic tubing and rubber fittings, cut to fit so there are no bends in the line... like a glove..
Thread Starter
Junior Member
Joined: Jul 2012
Posts: 99
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From: Succasunna NJ
Year: 1988
Model: Cherokee
Engine: 4.0
Changed air filter as well. It was dirty but no rodents or nests in the tube.
I must say the .3 volts from the CPS is in the back of my mind...
I must say the .3 volts from the CPS is in the back of my mind...
Thread Starter
Junior Member
Joined: Jul 2012
Posts: 99
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From: Succasunna NJ
Year: 1988
Model: Cherokee
Engine: 4.0
CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 24
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
Yet! here, they are like death and taxes. (it actually rains mice in my shop at night, judging by what I find in a bucket now and then)
Yea...mine died shortly after reading .03. Get this. the new Echlin read .4 right after I installed it....but went up to .5+ after a couple weeks. I understand plain old induction pretty well..but that thing is a little more tricky. Somehow it's iron core and the windings make current when nearby iron leaves. Maybe some "latent" magnetism, (alignment of polarization), occurs during operation. Check it again?
Yea...mine died shortly after reading .03. Get this. the new Echlin read .4 right after I installed it....but went up to .5+ after a couple weeks. I understand plain old induction pretty well..but that thing is a little more tricky. Somehow it's iron core and the windings make current when nearby iron leaves. Maybe some "latent" magnetism, (alignment of polarization), occurs during operation. Check it again?
Last edited by DFlintstone; Aug 25, 2012 at 04:12 PM.
Thread Starter
Junior Member
Joined: Jul 2012
Posts: 99
Likes: 0
From: Succasunna NJ
Year: 1988
Model: Cherokee
Engine: 4.0
Yet! here, they are like death and taxes. (it actually rains mice in my shop at night, judging by what I find in a bucket now and then)
Yea...mine died shortly after reading .03. Get this. the new Echlin read .4 right after I installed it....but went up to .5+ after a couple weeks. I understand plain old induction pretty well..but that thing is a little more tricky. Somehow it's iron core and the windings make current when nearby iron leaves. Maybe some "latent" magnetism, (alignment of politicization), occurs during operation. Check it again?
Yea...mine died shortly after reading .03. Get this. the new Echlin read .4 right after I installed it....but went up to .5+ after a couple weeks. I understand plain old induction pretty well..but that thing is a little more tricky. Somehow it's iron core and the windings make current when nearby iron leaves. Maybe some "latent" magnetism, (alignment of politicization), occurs during operation. Check it again?
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Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Thread Starter
Junior Member
Joined: Jul 2012
Posts: 99
Likes: 0
From: Succasunna NJ
Year: 1988
Model: Cherokee
Engine: 4.0
I'll test the MAP tomorrow.. Are you saying above, that I should do the bypass?
CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 24
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
http://www.bc4x4.com/faqs/yj.cfm?cat=5&faqid=164
No. my.o2 is it's not the CPS...Unless Pete disagrees, wouldn't think that^.
No. my.o2 is it's not the CPS...Unless Pete disagrees, wouldn't think that^.
Last edited by DFlintstone; Aug 25, 2012 at 07:20 PM.
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I gave it a good run.. about an hour. It ran beautifully. I pulled in the driveway and it started screwing up again. Black smoke, hesitation, the whole bit.. Son of a GUN!! I can't believe how smooth it was running and how fast that all changed.
I'll test the MAP tomorrow.. Are you saying above, that I should do the bypass?
I'll test the MAP tomorrow.. Are you saying above, that I should do the bypass?




...You give her a real "go" yet?