Question about 1993 Jeep Grand Cherokee

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Miss fire with black smoke - 1993 Jeep Grand Cherokee

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  • Jeep Master
  • 22,219 Answers

Erg valve disconnect it and it will run just fine

Posted on May 16, 2010

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Posted on Jan 02, 2017

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Smell fuel when idling


Were your plugs gaped correctly?

When you pulled the old plugs, were they very black or covered in oil?

If they were black, you have an oil leak. Check the area around the wires and see if there is any excessive oil buildup.

The fuel smell would be coming from the unburned fuel passing through your engine.

Did you have all the wires put back on one at a time? If not, you might have gotten the firing order wrong, or you have a bad coil pack.

Jan 08, 2014 | Chrysler Cars & Trucks

1 Answer

1996 jeep cherokee miss fires and white smoke from exhaust. replaced head gasket and still runs the same.. runs fine when cold.


White smoke is usually the sign of a blown headgasket. I would have the coolant system pressure tested before any serious damage is done.

Keep in mind this codes:
- Black is excessive fuel
- Blue is oil
- White is coolant

Then, if you see white smoke from the tailpipe, you have coolant escaping into the intake system.


Keep us updated.

Dec 21, 2010 | 1996 Jeep Grand Cherokee

1 Answer

Lack of power, exhaust smoke and engine miss firing, EGR Valve has been removed and cleaned, new EGR Valve was fitted, made no difference, old EGR Valve refitted, car runs with no exhaust smoke and no miss...


Just an idea but the Ford Mondeo ( european car ) from which I believe your engine
is taken has a habit of splitting a low pressure tube at the back
of the engine this is a relatively
cheap, easy fix. The other symptom this used to throw up was a
little more black smoke from the exhaust and a pacing/ surging from
the engine.

Mar 24, 2010 | 2004 Jaguar X-Type

1 Answer

My truck misses when it is first started and run ok when it warms up. It is a 4.3 motor automatic.


Do you get black exhaust smoke when first started? If so, then there is too much fuel at first which probably fouls several spark plugs, but as the engine warms up, the plugs start firing again. If no black smoke--is the check engine light ON? Read the code(s) if so and follow the clues.

Aug 02, 2009 | 1996 GMC Sonoma

1 Answer

RUNNING RICH AND MISSES,IT SMOKES BLACK


check your spark plug wires to make sure they are in the correct firing order, thats what it seems like the problem is

Apr 18, 2009 | 1993 Toyota Pickup

1 Answer

Flooding/shutting off/black smoke/harder on gas


Sounds to me like you have a bad coolant temperature sensor. Or a bad o2 sensor. Leaning towards the coolant temp. sensor. I hope that I helped. Best wishes.

Jan 20, 2009 | 2002 Chevrolet Silverado

2 Answers

Saab 93 2001 - kicks out white smoke when started then drives ok until it gets to certain temp then starts miss firing and kicking out smoke


is car consuming any antefreeze? does the temp fluctuate? on worst case, you could be looking at poss. headgasket problem white smoke is usually antifreeze. black smoke is fuel, and gray smoke is oil

Nov 30, 2008 | Saab 9 Cars & Trucks

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