rough idle

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06-23-2011, 07:46 PM

evannnboy

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Year: 1994

Model: Grand Cherokee

Engine: 4.0 l6

rough idle

Hey guys, I have an 1994 jeep grand cherokee laredo with the 4.0. It seems to idle rough but I haven't figured out why yet. I have a cold air intake throttle body spacer magnaflow exhaust accel super coil with new wires plugs distributor cap and rotor. Just did the coil plugs wires and distributor cap today hoping it might solve the problem.....it got a little better but I can still feel it....any suggestions on why it might idle rough???

Last edited by evannnboy; 06-24-2011 at 11:58 AM.

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06-24-2011, 10:30 PM

Quezzy

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Quote:

Originally Posted by evannnboy

Just did the coil plugs wires and distributor cap

What did you gap the plugs too? You have the correct firing order? Any Cels?

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06-25-2011, 02:14 AM

88XJSteve

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Year: 1996

Model: Cherokee

Engine: 4.0

You should take off your TB and clean it as it probably is dirty. See if that helps.

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06-25-2011, 04:01 AM

evannnboy

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Year: 1994

Model: Grand Cherokee

Engine: 4.0 l6

I gaped my plugs to .045 and my firing order is correct

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06-25-2011, 12:18 PM

evannnboy

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Year: 1994

Model: Grand Cherokee

Engine: 4.0 l6

Just cleaned tb and it didn't seem to help any other suggestions???

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06-25-2011, 05:43 PM

jeep-e

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Year: 96

Model: Grand Cherokee

Engine: 4.0 I6

IAC

What about your IAC? That one gets a few jeepers on here. Search it. I've seen write-ups on it here or elsewhere. It will give you a good heads up on what cleaners to use, techniques & what to look out for. Its cheap & easy also. Good luck & keep us posted. Keep searching 'rough idle' to see what others think & have tried.