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1995 jeep grand cherokee laredo will not accelerate


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ITSMEAGAIN
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Jul 18, 2011, 6:39 PM

Post #1 of 15 (3365 views)
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1995 jeep grand cherokee laredo will not accelerate Sign In

hello. i have a 1995 jeep grand cherokee laredo, 4.0 liter, 6 cylinder. after driving to the point where the engine warms up, the thing acts like it does not want to take the gas - as i push on the accelerator it starts to buck and jump around, like there is a "miss". if i ease off of the throttle, to the point where i am barely pushing on it, it will smooth out and run fine - but i am only moving at about 2 miles an hour. sometimes if i stop and let it cool down for awhile, it may run okay for a few miles, and then back to bucking and jumping. when i park it for the night and get into it the next day, it will run fine - until it warms up - and then start all over again. when it is going through these "episodes", the motor will run fine when i put it in park. i can "dead rev" it in park and it purrs like a kitten. put it in drive and the rodeo begins! any help would be greatly appreciated. thank you. mike


(This post was edited by ITSMEAGAIN on Jul 18, 2011, 7:24 PM)


Discretesignals
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Jul 18, 2011, 7:09 PM

Post #2 of 15 (3353 views)
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Re: 1995 jeep grand cherokee laredo will not accelerate [In reply to] Sign In

RIDEM COWBOY!! YEE HAW!!

Which engine do you have in this filly?





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


ITSMEAGAIN
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Jul 18, 2011, 7:19 PM

Post #3 of 15 (3349 views)
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Re: 1995 jeep grand cherokee laredo will not accelerate [In reply to] Sign In

sorry, didnt realize i forgot the engine. its a 4.0 liter, 6 cylinder


(This post was edited by ITSMEAGAIN on Jul 18, 2011, 7:25 PM)


Hammer Time
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Jul 18, 2011, 7:26 PM

Post #4 of 15 (3346 views)
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Re: 1995 jeep grand cherokee laredo will not accelerate [In reply to] Sign In

Those symptoms are consistent with either a bad coil, Mass Air flow sensor or restricted Catalytic converter.




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Discretesignals
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Jul 18, 2011, 7:51 PM

Post #5 of 15 (3341 views)
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Re: 1995 jeep grand cherokee laredo will not accelerate [In reply to] Sign In

Well, you can rule out the MAF sensor. Coil breaking down and worn out plug wires can cause missing under load.

You can check for restricted exhaust by screwing a back pressure gauge into the O2 sensor bung hole before the converter. If you have more than 3 psi at 2000 rpm, you got some corking going on.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


ITSMEAGAIN
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Jul 19, 2011, 2:51 PM

Post #6 of 15 (3320 views)
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Re: 1995 jeep grand cherokee laredo will not accelerate [In reply to] Sign In

thank you for your time and your help. any other suggestions? the plug wires, plugs, distributor cap are near new. the ignition coil is new. the catalytic converter is unrestricted. when you say coil, do you mean the "pickup coil" within the distributor? thanks again.


Hammer Time
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Jul 19, 2011, 2:55 PM

Post #7 of 15 (3318 views)
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Re: 1995 jeep grand cherokee laredo will not accelerate [In reply to] Sign In

No, I mean the "ignition coil"




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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Hammer Time
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Jul 19, 2011, 7:12 PM

Post #8 of 15 (3297 views)
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Re: 1995 jeep grand cherokee laredo will not accelerate [In reply to] Sign In

I deleted your other question. please don't create duplicate questions. Post your response here.




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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



ITSMEAGAIN
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Jul 19, 2011, 8:32 PM

Post #9 of 15 (3286 views)
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Re: 1995 jeep grand cherokee laredo will not accelerate [In reply to] Sign In

im sorry. i thought that when i was asking about engine fault codes, that i should do that within the "engine fault codes forum"


ITSMEAGAIN
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Jul 19, 2011, 8:38 PM

Post #10 of 15 (3284 views)
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Re: 1995 jeep grand cherokee laredo will not accelerate [In reply to] Sign In

can anyone tell me what problem is associated with fault codes #22, and #55 on a the 1995 jeep grand cherokee laredo, 4.0 liter, 6 cylinder? thanks.


Hammer Time
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Jul 19, 2011, 8:42 PM

Post #11 of 15 (3281 views)
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Re: 1995 jeep grand cherokee laredo will not accelerate [In reply to] Sign In

The 55 just means test complete. the 22 is for low voltage on the coolant temp sensor.




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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



ITSMEAGAIN
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Jul 20, 2011, 4:37 PM

Post #12 of 15 (3255 views)
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Re: 1995 jeep grand cherokee laredo will not accelerate [In reply to] Sign In

thanks for the fault codes hammer time. i just received more info on the problem. i spoke to the previous owner of the vehicle and was told that this happened to him several times, but it usually only did it when the car was sitting, idling, with the a/c on. he thought it also was low on fuel when it happened. he replaced the fuel filter, but obviously that didnt work. any thoughts? fuel pump or something related to fuel delivery? thanks again.


Hammer Time
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Jul 20, 2011, 7:03 PM

Post #13 of 15 (3244 views)
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Re: 1995 jeep grand cherokee laredo will not accelerate [In reply to] Sign In

I don't know what any of that would have to do with a temp sensor code.




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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



ITSMEAGAIN
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Jul 20, 2011, 8:12 PM

Post #14 of 15 (3238 views)
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Re: 1995 jeep grand cherokee laredo will not accelerate [In reply to] Sign In

the temp sensor code is obviously another problem. the post on the info i received was referring to my intial post on the vehicle not accelerating and/or bucking and jumping when depressing the accelerator. thanks.


Hammer Time
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Jul 20, 2011, 8:15 PM

Post #15 of 15 (3235 views)
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Re: 1995 jeep grand cherokee laredo will not accelerate [In reply to] Sign In

That could be directly related to the temp sensor so you need to resolve that first.




~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.





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