Question about 2002 Cadillac Escalade

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Running rich and hesitation on starting out but overall runs and idels good

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  • Cadillac Master
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Check for stored codes,and check the air filter.

Posted on Sep 11, 2010

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Posted on Jan 02, 2017

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1 Answer

Idels fine when cold if I run it about 5 miles it starts to miss end wont idel then dies


Check the ECT coolant sensor for sticking in a false low range letting engine run rich when warm. Check for vacuum leaks also.

Nov 06, 2015 | Cars & Trucks

1 Answer

My 91 laser will idel fine then warms up a bit and dies out! Then I have to give it fuel to start it again, then it runs rich and dies out again


Is the check engine light on? This can lead you to the source of the problem with a code scan test. Is it 4 or 6 cyl? Make sure the EGR valve is not stuck open as this will definately make it run rich and idle/stall. Common on the 6cylsfor a higher mileage engine.

May 18, 2015 | Cars & Trucks

1 Answer

Engine running rich


you could have a dirty or clogged air filter which would send a signal to the computer to add more fuel.

Feb 08, 2014 | Nissan Cars & Trucks

1 Answer

Starts & runs ok when cold , starts to run poorly as it warms up


Is the check engine light on ?
Has anyone checked the fuel pressure cold and hot ?

Feb 18, 2013 | 1991 Buick Park Avenue

1 Answer

Running rich its has new plugs the fuel press reg


MANY THINGS CAUSE RICH FUEL MIXTURE.FUEL INJECTORS.MASS AIR FLOW SENSOR AND BAD OXYGEN SENSOR.

May 24, 2010 | 1996 Nissan Maxima

1 Answer

4.3 L will not idel


check the Idle Stop Solenoid

May 22, 2010 | 1992 GMC Safari

1 Answer

My 1994 blazer is running very rich.black smoke is comming out of the exhaust.it runs good at a higher idel.i replaced many sensors already,


Most likely the fuel pressure regulator and injector spyder,under the intake manifold. You can get rebuilt ones. Look on internet for info,on the system.

Mar 11, 2010 | 1994 Chevrolet S-10 Blazer

1 Answer

My 1997 Jeep Grand Cherokee Laredo is starting to have a ''slight'' hesitation after I shut it off and re-start it again. WHen I accelerate at first it hesitates a bit. I let off the gas for a few seconds...


A slight hesitation after engine shut off due to engine running rich meaning not meeting golden air:gas ratio of 14.6:1 so fuel residue in chamber continue to burn for the last moment. The same rich fuel problem that was why you had to let gas off during acceleration. Need to Check out the O2 sensor Check out MAP sensor Good luck

Sep 13, 2009 | 1997 Jeep Grand Cherokee

1 Answer

Runs rich, check engine light, shudder when idleing


On your fuel rail is a fuel pressure regulator. It is round metal part and will have a vaccuum hose on it. With the truck running pull the vaccuum line off of the regulator and see if any fuel comes out. If so replace the regulator.While a PCM can fail it is rare and you most likely have some other type of issue.There are some other sensors that can make it run rich but without any codes I can't guide you any better. Good Luck

May 21, 2009 | 1995 Ford F150 Styleside Regular Cab

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