I dont understand my 4.0 HELP
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Newbie
Joined: Mar 2009
Posts: 4
Likes: 0
Year: 1993
Model: Cherokee
Engine: 4.0 slant 6
I have replaced plugs,wires,battery,satrter,alt,neutral safety switch,distributer cap and button and my jeep still isn't starting sounds like it wants to but it don't. ANY ideas would be great
Last edited by daddystoy; Mar 20, 2009 at 09:00 AM.
Seasoned Member
Joined: Sep 2008
Posts: 459
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From: ny (not the city)
Year: 1991
Model: Cherokee
Engine: 4.0
is it getting gas? prime it, pour a little gas in the tb (like a 1/4 cup) and try to start if it runs for a sec and shuts off then its not gettin gas.
well I know that works for a carb. maybe wait and see if anyone else thinks this is a good idea...
well I know that works for a carb. maybe wait and see if anyone else thinks this is a good idea...
Last edited by chefeagles; Mar 20, 2009 at 09:14 AM.
"CF Moderator"
Joined: Sep 2008
Posts: 3,045
Likes: 3
From: N.J. Shore Area
Year: 1994
Model: Cherokee
Engine: l6 HO
Have you tried changing the CPS (crank position sensor) ? if you have no spark or intermittent spark this can be the problem... Tj
Last edited by TrekkerJmm; Mar 20, 2009 at 03:03 PM.
yeah, sounds like youve got spark, have you pulled a plug still wired up and watched the spark ? then u need to check for gas ^ what he said ^ and check fuel pressure.
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CF Veteran
Joined: Mar 2009
Posts: 28,068
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From: Tenn. and Mich.
Year: 2004
Model: Grand Cherokee
Engine: 4.7L V8
If it's fuel-injected, check the ASD. "Auto Shut Down" relay is in the Power Distribution Center under the hood. It supplies power to the fuel pump.
Seasoned Member
Joined: May 2008
Posts: 253
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From: Nor Cal
Year: Gone but not forgotten
Model: Cherokee
Engine: 4.0
More than likely its your CPS If this is out there will be no spark and no fuel injector pulse. If you haven't changed it you really should. I'd almost bet this will fix it.
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