Question about 1994 Jeep Grand Cherokee

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94 grand cherokee limited- engine dies when returning to idle after rev

When engine is rev'd up...it dies upon return to idle

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Is your a/c running when it dies if so tern it off because the a/c is draging your motor down and if it is on defrost because the defrost runs the compressor so in the winter you have to unplug the a/c
because it does the same thing on my 94 JGC

Posted on Sep 10, 2008

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Vacuum sense or EGR sensors somehow off calibration, low idle, high friction in engine or bearings.... Seriously, do some searching before you offer a symptom with no evidence to narrow a diagnosis; form better questions.

Posted on Aug 16, 2008

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94 jeep grand cherokee. starts,idle. throw warmup. as soon as I touch the excellerator let up the rpm drop & engine stalls.


Most low idle speed problems on these engines are due to a faulty idle air control valve but since you state the idle will go up and return to idle then i would say it is working properly i think you have a throttle body coking problem ( dirt and grit accumulates around the butterfly valve in the throttlebody ) to fix this simply remove the fresh air hose from the throttlebody and open the throttle all the way up use a clen rag and wipe clean you may use a solvent such as B12 on the rag but dont use too much 1_4_2013_4_54_06_am.jpg

Jan 04, 2013 | 1994 Jeep Grand Cherokee

1 Answer

Engine starts and idles fine, but will not rev up (2001 Jeep Grand Cherokee 3.1 diesel auto)


If it was a fuel shortage the engine would rev but to limited speed. This is a lack of air to throttle body. Check for clogged air filter and all the piping and the throttle body.

Sep 28, 2012 | 2001 Jeep Grand Cherokee

1 Answer

94 chevy 5.7 4X4 has oil pressure at 40 psi when starting engine after warming engine oil pressure drops to 15 psi no engine noise?


15 is ok at idle, 10 will return the light on in the cluster. I would not worry about it unless it goes lower. The causes can be worn bearings, but if they were that loose you would hear a know for a second on cold start. Have you checked the pressure with a mechanical gauge to verify the notoriously inaccurate electric system

Sep 17, 2012 | 2001 Jeep Grand Cherokee

1 Answer

1996 Jeep Grand Cherokee. When I stop at a light engine revs up and feels like it is trying to push the car. Then the car dies.It will start back and run fine after that.


Could be a sticking idle air control valve, or dirty throttle body.
The computer uses the valve to control idle speed by regulating the amount of air into the intake.

Jul 18, 2012 | 1996 Jeep Grand Cherokee

2 Answers

My grang cherokee2002 us spec, while driving trnz changes fine but when cick down or full excelrate and RPM reaches 4.5 or 5 engine is loosing power and getting noisy and RPM not going more, while gear on...


You are hitting the rev limiter top range, which cuts off your ignition.

I have a 2001 Grand Cherokee and the problem drives me crazy, but it is the way the car is designed- as soon as you hit the rev limit, it shuts down ignition and your jeep will "buck" - a real pain when you are trying to accelerate into traffic!

You have the 4.0L straight six engine, yes?

If so, please take my advice and learn to live with the minor annoyance of the rev limiter- that engine is IMHO the best Chrysler ever made (nearly "bulletproof"!) and it was so reliable you cannot even get it in a jeep now! For decades, that engine was used in welders, tractors, generators...and yes, jeeps... and it is a favorite among mechanics for its durability!

Feb 01, 2011 | 2002 Jeep Grand Cherokee

1 Answer

'94 Jeep Grand Cherokee Limited: Ball Bearing falling off


unless your going to rebuild this yourself i would be bring it back for inspection. Its your only option.

Jul 19, 2010 | 1994 Jeep Grand Cherokee

1 Answer

2002 Jeep Grand Cherokee Limited 8L, engine revs while driving, especially on long road trips


THE FIRST THING IS TO HAVE THE COMPUTER SCANNED FOR CODES, THESE CODES WILL HELP IN FINDING PROBLEM, ALSO CHECK THE IDLE AIR CONTROL VALVE, AS THIS VALVE CONTROLS THE IDLE AND GOES BAD OFTEN. AND LAST TAKE A GOOD LOOK AT VACCUM LINES FOR LEAKS, MOVE THEM AROUND AND LISTEN FOR A HISSING NOISE. GOOD LUCK.

Apr 28, 2010 | 2004 Jeep Grand Cherokee

1 Answer

How do i set the timming on 94 mercury villager van


you only set base timing to 15 degrees BTDC (before top dead center).

Ignition Timing
  1. s1v~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Parking brake control should be applied.
    Depress the parking brake pedal, and warm the engine to the normal operating temperature.
  1. Turn off all electrical loads.
  1. Rev the engine to 2000-3000 rpm two or three times and allow the engine to return to the idle.
  1. Turn off the engine and disconnect the throttle position sensor electrical connector. (not really necessary)
  1. Start the engine and rev it to 2000-3000 rpm two or three times and allow the engine to return to the idle.
  1. Check the idle speed. The idle speed should be between 700-800 rpm in PARK (P) or NEUTRAL (N) position.
  1. NOTE: Make sure that the timing pointer is pointing to the 15° Before Top Dead Center (BTDC) mark on the crankshaft pulley. Each notch on the crankshaft pulley represents 5 degrees.
    Check the ignition timing with a timing light.
632206b.gif go here for villager help

http://autos.groups.yahoo.com/group/villagerquest/

Jun 09, 2009 | 2001 Mercury Villager

1 Answer

RPM opposite effect on oil guage


how many miles are on the vehicle this usually happens when the oi; pump or engine is wore out.

Dec 13, 2008 | 2002 Jeep Grand Cherokee

1 Answer

ENGINE DIES


Check for a vaccum leak at the intake with starting fluid. Frankster016

Oct 22, 2008 | 2001 Jeep Grand Cherokee

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