low/rough idle cherokee, need help
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Joined: Aug 2011
Posts: 43,971
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From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Well I was bored tonight after work, I decided to do some tinkering on the jeep, here is a little video clip of it at idle. Since I have done all these tips on your list cruiser my jeep runs much better, also with the addition of the new motor but still haven't been able to shake this low idle problem before and after the new motor.
What is that ba ba ba ba poh ba ba poh ba poh exhaust sound? Is that how it is suppost to sound?
http://youtu.be/QhofSUY8k2I
What is that ba ba ba ba poh ba ba poh ba poh exhaust sound? Is that how it is suppost to sound?
http://youtu.be/QhofSUY8k2I
CF Veteran
Joined: Aug 2011
Posts: 10,489
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From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
Tack out to lunch? That sounds closer to 1000 then 200..... Btw when the inside of that filter there on the VC gums up it will act like the RM seal went bad as crankcase pressure rises.
Last edited by DFlintstone; May 12, 2015 at 07:27 PM.
Thread Starter
Junior Member
Joined: May 2014
Posts: 63
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Model: Cherokee
its close to 500-550rpm I checked it with a scanner a few weeks ago
CF Veteran
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Posts: 8,357
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From: Canton, MI
Year: 1999
Model: Cherokee
Engine: 4.0
Is that soot on the inside of the tailpipe? Looks black. If so, you may be running a little rich.
Senior Member
Joined: Dec 2014
Posts: 509
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Model: Cherokee
On my jeep the 500 mark is just barely above 0, next is 750 and after that 1000 which is actually labeled. You can tell the intervals are 250 looking at the rest of the tach.
So I don't think they ever intended for you to be able to read/measure rpm <500 with the factory dash tach.
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Better if it's not in the Metric mode, at least for those in the US.
Plugs, wires , rotor, and cap should be NGK plugs, cap and rotor with brass terminasl, and Napa wires.
Are your intake manifold bolts tight? .
Plugs, wires , rotor, and cap should be NGK plugs, cap and rotor with brass terminasl, and Napa wires.
Are your intake manifold bolts tight? .
Thread Starter
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Joined: May 2014
Posts: 63
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Model: Cherokee
the plugs are champion (they have about 10 000km )
yup bolts are all tight
ill try to change the units
Last edited by noraayrrek; May 15, 2015 at 12:15 AM.
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Model: Cherokee
Thread Starter
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Joined: May 2014
Posts: 63
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Model: Cherokee
Well I think I am going to get some new injectors the 746 give them a try. I been doing some reading and it seems some people with the Renix have problems with the 703 ( which I have and they are brand new)
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0