Question about Jeep Grand Cherokee

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2004 jeep grand Cherokee fuel injectors stay open

Engine 4.0 Injectors 1 & 5 stay open. What exactly causes that to happen?

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  • Jeep Master
  • 5,252 Answers

If not pulsing, could be a bad pcm. The computer grounds the injectors internally for a split second to pulse them . If trash or debris is not making them stick open, buy a "noid light" for checking injector circuits. Plug it in to #1 or #5 and crank engine over: if circuit is working right, noid light will be blinking. If light is on steady, computer is not interrupting ground to cause pulsing.

Posted on Jul 11, 2013

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Posted on Jan 02, 2017

mcgyver468
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SOURCE: my 93 jeep grand cherokee runs rough while in idle

BEFORE CHANGING THE INJECTORS, TRY REMOVING THE HOSE THAT LEADS TO THE THROTTLE BODY AND CLEANING THE THROTTLE BODY AND THROTTLE PLATE. USING AN OLD TOOTHBRUSH AND A CAN OF CARB AND CHOKE SPRAY, SCRUB IT, WHILE WIPING OFF THE CARBON WITH A CLEAN CLOTH RAG. THIS SHOULD HELP IT RUN CLEANER AND WITH LESS MISSING. SPRAY A LITTLE CARB AND CHOKE WHILE THE ENGINE IS RUNNING AND KEEPING IT AT ABOUT 2000 RPM'S. HOPE THIS HELPS. PLEASE KEEP ME POSTED. THANKS FOR AN HONEST RATING AND FOR USING FIX-YA. GOOD LUCK

Posted on May 20, 2009

Larrysito
  • 73 Answers

SOURCE: diesel injector leaks air on 2002 jeep grand cherokee

There must by a copper ring if isnot under the jet it is y ....replace and tighten it .....

Posted on Jun 08, 2009

  • 31 Answers

SOURCE: how to change fuel injectors in a 2000 jeep grand cherokee

Hi, you have to remove the fuel rail and then remove the electrical connector and then there is a clip that holds the injector to the fuel rail remove that clip and then remove the injector

Posted on Nov 18, 2009

  • 2926 Answers

SOURCE: 99 jeep grand cherokee no start 4.0L no power to

Check the auto shut down (ASD) relay located in the power distribution box.

Posted on Jul 23, 2010

  • 14036 Answers

SOURCE: can you remove the injectors

YEP REMOVE TOP ENGINE COVER AND DISCONNECT INJECTORS ELECTRICAL CONNECTOR,REMOVE FUEL RETURN LINE FROM INJECTOR, REMOVE FUEL INJECTOR HIGH PRESSURE LINE, REMOVE FUEL INJECTOR RETAINER AND RETAINING BOLT,THEN REMOVE FUEL INJECTOR FROM THE CYLINDER HEAD. YOU NEED A FUEL INJECTOR EXTRACTOR TOOL 9075A ON TO INJECTOR AND CYLINDER HEAD.YOU DONT HAVE TO REMOVE THE ENGINE.

Posted on Jun 29, 2011

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Can you remove the injectors on 2003 Jeep Grand Cherokee diesell whithout removing the engine not a lot of space to get the back injector out ???????


YEP REMOVE TOP ENGINE COVER AND DISCONNECT INJECTORS ELECTRICAL CONNECTOR,REMOVE FUEL RETURN LINE FROM INJECTOR, REMOVE FUEL INJECTOR HIGH PRESSURE LINE, REMOVE FUEL INJECTOR RETAINER AND RETAINING BOLT,THEN REMOVE FUEL INJECTOR FROM THE CYLINDER HEAD. YOU NEED A FUEL INJECTOR EXTRACTOR TOOL 9075A ON TO INJECTOR AND CYLINDER HEAD.YOU DONT HAVE TO REMOVE THE ENGINE.

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What could be causing multiple engine missfires


This could be one of many things:

1. Bad or dirty spark plugs. Oil could be getting on the plug tips and fouling the plugs.

2. Bad plug wires. Wires are arching and causing the plugs not to fire properly.

3. Bad electronic ignition. This could be a bad module,

4. Dirty fuel injectors.

5. Cam Sensor is bad. This usually happens after the car warms up.

6. PCM (Powertrain Control Module) could be failing

7. More more more

Check or have checked the OBD codes and verify the exact problem. This will tell you the cause and you can resolve the problem based on this result.

May 25, 2011 | 2000 Jeep Grand Cherokee

1 Answer

Hi, I Purchased a 2001 Jeep Grand Cherokee LTD with a 4.7L engine. Please keep in mind. I had the jeep fully inspected, when i purchased it. At the time it passed with flying colors. I have taken the...


check the O2 sensors in the exhaust manifold with a automotive meter not a code reader ,then trade it in for a diesel manual version as these are impressive but 4.7 litre gas guzler at our petrol prices about 10 dollars a gallon in the -uk and around 7/8 dollars here in spain this vehicle you couldnt give away here

Mar 04, 2011 | 2001 Jeep Grand Cherokee

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When i start the engine on my 04 jeep 4.7 liter engine it sputters but clears up and idles good and it runs good no loss of power and no check engine light. it happens when it sits for a priod of time i...


The first thing i would check is the fuel system hook a fuel pressure gauge up to the fuel rail and check the fuel pressure, after you have verified the fuel pressure is good let the gauge sit and monitor how much "bleed down" occurs if the bleed down is out of spec i would bet the fuel pressure regulator is bad or theres a leaking fuel injector causing fuel to drip into 1 or more of the cylinders causing a rich condition at startup.

Dec 06, 2010 | 2004 Jeep Grand Cherokee

1 Answer

Jeep cherokee 2.8 CRD smoking. Replaced the injectors without any improvment. The garage told me that the smoke will stop after I have driven it for a couple of handred miles. Is this true.


from what you say, they said," it was the injectors that were faulty",hence changeing them,you could have tried a fuel additive/injector cleaner which could have had the same effect.....try a can to 5 gallons of fuel and if no improvement within 100 miles,give them HELL.smoke from a turbo engine could be dirty fuel/compression low/air leak from the turbo pipes/lazy turbo,etc but this engine is not exaclty the cleanest on emmisions.so expect a SMALL amount of smoke when cold or when accelerating HARD.

Dec 03, 2010 | 2004 Jeep Grand Cherokee

1 Answer

How to replace fuel injectors


disconnect the battery depressurize the fuel rail from the test port schrader valve unplug the injector clips one at a time marking them from front of engine # 1 - # 6 at rear of engine unbolt the fuel rail from the intake gently wiggle the fuel rail while pulling it up the injectors will stay in the fuel rail undo the clips on the rail holding the injectors to it changing them all greasing the o-rings on top and bottom of injectors install the fuel rail and injectors back on engine plug them in reconnect battery cycle key on and off a few times bleed air out of fuel rail and your done this is for the 4.0 engine as you did not specify what you have . the v8 engine is similar hope this helps

Jul 25, 2010 | 1995 Jeep Grand Cherokee

1 Answer

2001 jeep Grand Cherokee fuel injectors


check the injectors on that bank for pulses.. a regular 12v text light will do it should flash when cranking... its very possible that the crank sensor or camshaft sensor on the replacement engine is bad and giving you all the problems you have now.. are you using the original injectors? if you have injector pulses then check the coil for pulses the same way.. btw make sure you have 12v to them even before cranking engine could be a bad asd relay..wet plugs on one bank would also indicate a possible leaking injector and basicly draing the fuel starving the oposite bank for fuel.. to verify that the rail must be lifted by removing all 4 bolts make sure the clips hold the injectors firmly and turn the key to run but dont crank it then look for fuel leakin from bottom of injector(s) any drips is a bad injector..

Jan 28, 2009 | 2001 Jeep Grand Cherokee

1 Answer

2004 Jeep G Cherokee diagnostic code open injector


It could be a faulty pcm or wiring as you stated in you post. the pcm pulses a ground to the injector circuit allowing the solenoid in the injector to activate momentarily are inject fuel into the intake. if you give me the engine size. V8 4.7L or strait 6 cylinder 4.0L and i will post the proper wiring diagram for the fuel injectors to help you out with your battle

Jan 09, 2009 | 2004 Jeep Grand Cherokee

3 Answers

1996 Jeep Grand Cherokee - Will Not Start or Run


they have crankshaft sencers on the transmission on jeeps. it would be up high on the drivers side on front of transmission. they will cause it to not get fuel or fire and can run then quit.

Jul 19, 2008 | 1996 Jeep Grand Cherokee

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