Question about 1994 Jeep Grand Cherokee

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1994 Jeep, Grand Cherokee starts to stumble after warming up. Aic motor goes wild and tps loses all voltage for a few seconds and then returns to idle voltage (0.71)V

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Has all the electrical connections been inspected including the harness that these wires run together in?

Posted on Apr 05, 2011

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Engine stumbles only in no load circumstances. Idles smoothly, and stumbles only in no


no miles stated, 400k miles> or 100 = 100k?
if any 95 has 100k miles that be like a new car. no ?
5k /year, wow...
trouble is i cant drive car. and see this effect.

the issue is acceleration, right? :called Hesitations !
and only happens on a hot engine , yes?
and never happens wide open throttle.? correct?
HAPPENS:
only when tipping in the throttle at cruise. (then self corrects )
THE TPS sensors does that.
The TPS is a demand sensor. it sees driver DEMAND
acceleration, and this is detected and the PCM goes to ENRICH mode. this is done or the engine goes LEAN until the MAP BARO READINGS, catch up and correct fueling.
that is my wild useless guess. (not driven and me not scanning the PCM while it fails.)

The TPS is a rate of change sensor.
This is because all air meters made are slow.
The TPS hides this fact. until bad.
there are other causes,but im not there with my scan tool..
and (box of gauges)

Aug 29, 2015 | 1995 Jeep Grand Cherokee

1 Answer

1999 jeep tps voltage to high


Well, it could be the computer, the sensor, or a problem in the wiring harness.
The computer sends a 5 volt reference to the sensor and it should return something like .5 volts when the throttle is closed. As the throttle is opened the resistance goes down and the return voltage goes up.
If the return voltage is the same as the input, the sensor is shorted internally. Or something is going on in the wiring harness.
The 5 volt reference is aprox, it should be the same as the other sensors. So 5.7 volts may be ok coming from the computer.

Dec 18, 2012 | 1999 Jeep Cherokee

1 Answer

Jeep grand cherokee choking problem after a few minutes.


Check your idle air control valve. Sounds as though it may be the problem. The other item could be the TPS, but I doubt it because it would idle poorly all the time even after warming up.

Apr 07, 2012 | Jeep Cars & Trucks

1 Answer

1993 Grand Cherokee won't stay running or turn over


Sounds like a clogged fuel filter to me, maybe look into the TPS: throttle positioning sensor. Good luck

Feb 11, 2012 | 1993 Jeep Grand Cherokee

1 Answer

My 1997 jeep grand cherokee starts o.k i have no check engine light on, but every now and then the idle will go down for a few seconds and sudden acceleration will occur. this happens regardless of the car...


there is a rpm magnet that bolt on top of your transmission i had a jeep that done the same thing and repleced that and havent had a problem sinceits located on the left top side of your tranny has one little bolt that holds it in and a wire coming off of it that should fix your problem.

Feb 02, 2011 | 1999 Jeep Grand Cherokee

1 Answer

Will not idle but will stay running if under load. I changed the TPS but only changed the idle for about ten minutes. Please help im lost


Sounds like the AIC (Air Idle Control) motor might be bad or stuck in the closed position not allowing enough air to enter the engine at idle. Also when you changed the TPS you need to make sure that it is set for 0 deflection, if not the same will occur because the computer won't know that the throttle is at idle and will close the the AIC thinking you have you throttle depressesed.

Sep 15, 2010 | 2002 Jeep Grand Cherokee

1 Answer

1994 Jeep Grand Cherokee will start up fine but stalls only a few seconds later


The check engine light should be on--go to Autozone or a similar business that allows free use of their computer scanner and check for any stored codes. This should point you in a general sense to any current problems. Watch for any fuel related troubles like a bad fuel pump, or a plugged fuel filter. It could be a bad crankshaft or camshaft sensor, but they usually either work or don't. Don't try to 'shotgun' the problem with parts as that can get very expensive when you buy non-returnable parts. Good luck!

Jul 03, 2010 | 1994 Jeep Grand Cherokee

2 Answers

94 jeep grand cherokee will not shift into overdrive


My 97 Jeep Grand Cherokee was doing the same thing. I changed the TPS ( Throttle Position Sensor) Now it is great goes into overdrive fine. It is really easy to change.

Jan 27, 2009 | 1994 Jeep Grand Cherokee

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