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New 4.0 in a 1999 jeep grand Cherokee, at start, engine accelerates to max, have changed out throttle body and its components, still takes off like a jet, new to site, call me Tom at 505-901-1055

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  • Cars & Trucks Expert
  • 305 Answers

You may have a problem with the throttle position sensor,check your IAT well

Posted on Jun 18, 2014

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GM Elec
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SOURCE: 2000 grand jeep cherokee dies while slowing down

Its not unusual for the crankshaft sensor to intermittanly fail. The crank sensors are not real expensive and are not extremely hard to change.
The Crankshaft Position Sensor (CKP) is mounted into the engine block above the starter motor. Engine speed and crankshaft position are provided through the crankshaft position sensor. The sensor generates pulses that are the input sent to the powertrain control module (PCM). The PCM interprets the sensor input to determine the crankshaft position. The PCM then uses this position, along with other inputs, to determine injector sequence and ignition timing. The sensor is a Hall effect device combined with an internal magnet. It is also sensitive to steel within a certain distance from it.
Below is a pic of the sensor location.
Good luck.
Regards,

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Posted on Jul 23, 2009

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I've got a 1996 jeep grand Cherokee with the 5.2 v8 fuel injected Holley throttle body. My problem is while driving at soft or low acceleration it accelerates fine, but if you hit the throttle hard it


I would check the voltage on the throttle portion sensor with the engine off from idle to wide open throttle.If there are any dead spots, replace the sensor. If the tps checks out, you should check fuel pressure. If you have good fuel pressure, you may want to make sure there isn't a lot of slack in your timing chain. I don't believe you mentioned the mileage of your vehicle. Best of luck.

May 03, 2014 | 1996 Jeep Grand Cherokee

1 Answer

1996 Jeep Grand Cheerokee. Will only start will accelerator pushed and will only keep running if it is pushed. If I let off, it stalls completely.


Could be the idle air control valve or a dirty throttle body.
The computer controls idle speed by how much air enters the throttle body and intake.
You would need to check the throttle body and test the control valve.

Feb 15, 2013 | 1996 Jeep Grand Cherokee

1 Answer

How do you set the throttle position sensor on 1999 jeep grand cherokee 4.0 litre


That sensor is not adjustable. It slides onto the throttle shaft and is screwed in place to the throttle body. Idle speed is controlled by the computer by adjusting air flow through the idle air control valve. If the idle is too high (you did not say) first clean the throttle body bore and plate, then if necessary remove the control valve, cleaning out the passage in the throttle body and carefully cleaning the valve itself, without turning the plunger. If that does not help, you will need to do electrical testing on that and other components to find out what's going on as well as checking all vacuum hoses attached to the engine for cracks or leaks.

Nov 12, 2010 | 1999 Jeep Grand Cherokee

1 Answer

How do you change the tps on a 2000 jeep grand 4.7


The exact placement of the throttle position sensor generally is located on the side of the throttle body below the air intake tube on top of the engine.

To replace simply remove the air intake duct (usually one plastic screw), locate the sensor, disconnect wire plug in, remove the two sensor mounting screws (torx screw variety, size not remembered) and the sensor will come off. When replacing be sure to line up the throttle shaft with the proper groove inside the sensor...it should just slip in there pretty easily with a little bit of wiggling. Reinstall doing the reverse of the above.

Take's about 5 - 10 min to replace from start to finish and remember to clean the throttle body before starting this job to ensure no dirt will enter the engine. Good luck, Merry Xmass

Dec 24, 2009 | 2000 Jeep Cherokee

3 Answers

98 jeep grand cherokee limited 4.0 litre. starts up, during warm up process engine will idle irradically and stall out. starts back up and does the same thing. no check engine light on. cleanrd throttle...


Does this thing have a throttle body that looks like a computer-controlled carburetor?

If so, start motor and verify that it behaves irratically and then stalls.

then, spray WD-40 liberally around base of throttle body where tb meets intake manifold.

Start motor...

Does the problem go away, at least whilst for a little while?

Yes?

You gotta vacuum leak. Replace gasket under TB and tighten bolts to factory spec.

Mar 09, 2009 | 1996 Jeep Grand Cherokee

2 Answers

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.

Feb 22, 2009 | 2002 Jeep Grand Cherokee

3 Answers

Rough idle stalls at low rpm's


check your transmission fluid,the motor will stall when fluid is low

Dec 06, 2008 | 1996 Jeep Grand Cherokee

1 Answer

Cruise control 2000 jeep grand cherokee


insufficient info. The cruise control has a cable that runs from the servo, located just in front of the battery, to just behind the air intake, to the throttle body. (This is on the 4.7L V8 engine.) Check for that cable being connected at the throttle body. That connect is adjacent to the accelerator cable.


Jul 16, 2008 | 2000 Jeep Grand Cherokee

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