Question about Jeep Grand Cherokee

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I have a 1994 jeep grand cherolee it takes a while idle after several starts and once it starts it idles good but once you on the road and stop it doesnt want to accelerate right away and once you park it wont start again, have new crank sensor, sparkplugs, wireset, distributo all new what can be wrong?

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  • Jeep Master
  • 20,706 Answers

We cant help at all , until you disclose the engine option.
what engine, of the many?
ZJ car./

generic answer.
1: check all fuses.
2: do the skipped ? 60k mile tune up now.
3: if engines has EGR clean it , now the main valve must not stick.
4: clean the ISC valve.

for you:
did you for get filters at the 60k tune?

so it wont start ,so do you have spark at all 6 or more spark plugs.?
that be First., (the PCM cuts fuel if spark is lost) so........
when it fails to start we check for spark and also
connect the Diagnostic jumper, and see the CEL flash
and see if we get DTC errors cranking. (5 sec. crank minimum)
if you get these errors, BINGO, no more wasted money replacing senors. the PCM reports a bad CKP sensor fast.


see ZJ here.
http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service

also watch the ASD relay ,
does it close at key on and stay closed for 2 seconds.
and if you key on and crank fast, does the ASD stay closed
for full cranking duration?
yes, good
no, the PCM sees errors and drops the ASD by DESIGN. (fire safety)
learn how your ASD works.,

did you replace the whole distributor and not read the FSM
on HOW TO DO IT? oops..... now its 2 times busted.

Posted on Feb 13, 2014

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: 4.9 liter will idle but wont accelerate have to start with ether

yes checked fuel pressure and replaced the fuel filter, checked the mapp sensor,tested throttle position sensor, has strong spark, 50psi fuel pressure, fresh tune up, runs real rich and rough idle but wont rev up like fuel injectors arent speeding up, also checked exhaust. thanks julius

Posted on Oct 10, 2008

  • 393 Answers

SOURCE: bogs when accelerating from an idle, rough starts.

listen for a vaccum leak.also try disconecting bat for 5 min the reconnect and start truck and hold idle at 1500-2000 for 5 min. this resets and teaches computer to self adjust

Posted on Nov 16, 2008

losflip
  • 94 Answers

SOURCE: Low idle, stalling frequently

Hi, Check all vacume hoses and fittings make sure there are no vacume leaks also make sure ignition timing is correct.

Posted on Dec 01, 2008

ourhowse
  • 2007 Answers

SOURCE: High idle in a 2004 Grand Am

Yes, the sensor is the first thing you should replace.

Posted on May 08, 2009

  • 1 Answer

SOURCE: 97 grand prix gtp starts then immediatly dies

If you have a GTP these engines use a hi output fuel pump. they use a fuel pump resistor located under the battery tray (look up from under the car) This resistor lowers the voltage to the fuel fump when not in boost mode. because of its locatoin it is prone to corrosion. if you bypass the wires and the engine starts and stays running replace the resistor

Posted on May 16, 2009

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2 Answers

Jeep heat is not working and when I am driving has a loud rumbling sound every once in a while.when I am stopped car seems to idle to high and wants to take off by itself.


Sounds like you have several different problems.

For the heater you may just be low on fluid in the radiator. Your thermostat may also be stuck open.

The loud rumbling could be several things as well. You could have a CV boot, Universal that is going out or gone already, It could also be a brake rotor issue or a wheel bearing.

Does the idle ever operate in a normal range or does it always idle high and wants to take off.

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1 Answer

1995 jeep grand cheerokee laredo 6 cyl. randomly dies then takes anywhere from five minutes to hours to restart


The only component I know of, that shuts a Jeep off while idling or driving 40mph down the road, is a bad crank sensor. Usually when it starts going bad, it will sporadically shut off, like yours does. Eventually, it will just die and the Jeep will not start at all. Have it tested and replaced, if necessary.

Mar 15, 2013 | 1995 Jeep Grand Cherokee

1 Answer

My 2004 jeep grand cherokee is stalling when driving slowly or stopping?


simple test
ut the hand brake on and start the car
idling ok --good --apply the foot brake-- idling bad --replace the brake booster
check for other vacuum leaks including transmission actuator hose , dash vent controls hoses

May 09, 2017 | 2004 Jeep Grand Cherokee

1 Answer

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

My 1999 jeep will stop running while driving it


Hi, i have a 1999 jeep grand cherokee, 4.0 litre, had the same problem, quits running out of the blue, driving down the road, or sitting idling. starts right back up or takes some cranking to get it running. found out that the crankshaft position sensor was going bad, cost 40$ for the part, but had to have mechinac replace it due to it's location, hard to get at. jeep runs great now.

Jun 17, 2011 | 1999 Jeep Grand Cherokee

1 Answer

The engine in my 1994 jeep grand cherokee 4.0 idles very low (below 400 r.p.m's) when it sits still, Can I idle it up....how??


The idle speed adjustment on most fuel injected vehicles is located in a recessed hole near the throttle butterfly on the intake manifold(sometimes with a plug in it). Screwing out the adjusting screw should increase idle speed.

Aug 18, 2010 | 1994 Jeep Grand Cherokee

2 Answers

Stalling when stopping idleing high


had the same problem and it was a blown head gasket check and see if water in oil

Aug 04, 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

My jeep studders like it is starving for fuel


It could possibly be your TPS or throttle position sensor. It plugs into the side of the throttle body and tells the injectors how much fuel to squirt. If the voltage source to the sensor is incorrect it may cause the jeep to idle rough.

Sep 21, 2009 | 1994 Jeep Grand Cherokee

1 Answer

Once I start my 1994 Jeep Grand Cherokee it starts hestating.


check idle control valve mounting hardware & electrical connection on tbi. do not over torque bolts.

Mar 25, 2009 | 1994 Jeep Grand Cherokee

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