Question about 1998 Jeep Grand Cherokee

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I have a 1998 Jeep Grand Cherokee, an automatic, with approximately 100,000 miles on it. In the last 2 weeks it has started hesitating, misfiring, and stalling at low speeds like around 30 mph or slower. When the jeep dealer performed the diagnostic the found the tps sensor failed the pinpoint sweep test, they were running the engine and found crank sensor signal dropped out at PCM. Plugs and wires are marginal. The replaced the crank sensor, the tps sensor, cap and rotor, removed and cleaned the throttle body, replaced the gaske and reinstalled. Also replace the spark pugs and wires. They also replace the battery which was only 1 1/2 years old. The right turn signal now only works intermittenly and it was fine before they started working on it. I am now into the vehicle for $1500.00 and would like to know what to do next. Any suggestions?

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Throttle position sensor is not the only sensor or component involved in Idle, or full speed driving. Remember that on a fuel injected engine AIR is everything. Unless the computer can't send the proper signals to the injectors, fuel ( aside from a bad fuel pump ) is not going to be an issue. Make sure that the other sensors on the throttle body are working fine. Take a look at the throttle body yourself. It's not a hard procedure. Just look at it and run the engine. Is running correctly at all temperatures? As far as the directional signal, you have to trouble shoot that one, but it may not be difficult to find the issue. Check for a loose bulb.

Posted on Apr 18, 2014

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Posted on Jan 02, 2017

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Mikey108
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SOURCE: 2002 Jeep Grand Cherokee Lardo misfiring

You say you changed the cam sensor. A1391 code is a crank sensor on the top of the trans. bell housing.

Posted on Feb 24, 2009

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SOURCE: 1993 Jeep Grand Cherokee engine problem

If the crank sensor (reaR at bellhousing) is dirty, will not start, clean up and visually inspect

Posted on Apr 29, 2009

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SOURCE: 2001 jeep grand cherokee no start, no cam signal or ASD control from pcm

IF YOU PULL OUT CAM SENSOR YOU HAVE TO PUT A TOOTH PICK IN THE TWO HOLES ON THE TOP AND THEN PUT IT BACK IN AND FACE IT TO THE BACK OF THE ENGINE.KING OF 4.0

Posted on May 15, 2009

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SOURCE: MISFIRE CYLINDER #3 CHECK ENGINE LIGHT COMES ON VEHICLE

Check spark plug wires for corrosion

Posted on Aug 27, 2009

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SOURCE: stalls and backfires 1997 jeep

you need to check the fuel pressure,and did you mean you replaced the distributor or just the rotor because inside the distributor is a pickup plate that some times causes this also 02 sensor can cause this.is your check engine light on if so go to chain auto parts store they usually read your codes for free.

Posted on Nov 26, 2010

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