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Could name them Snap Crackle and Pop

First is not a sensor it is the idle air control valve and has a stepper motor and a piston

Next is MAP sensor it measures the manifold pressure

Last is top of the OPDA (oil pump drive assembly) and the sensor on top is either called cam angle sensor or cam position sensor
The OPDA has a gear spun by a gear on the camshaft


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The one not circled in middle of first photo senses the angle of opening of throttle body butterfly and is called the throttle position sensor


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Discussion Starter #8
Thank you for all your input I did replace all of those sensors in my Jeep I also replace the ECM module and my issue is as I am driving the jeep I am getting hesitation the RPM gauge gets stuck once in awhile and it's very frustrating. Any more input would be completely gratifying. I have no vacuum leaks as I have checked all the hoses and had my mechanic check them as well. He seems to believe it was the ECM so I replaced it with a plug-in play the Jeep Ran fantastic for about 3 days, and it started doing the same thing. I sent the original ECM to get repaired for $225 and I have not received it back yet I'm hoping that they find a problem with it and fix it.
 

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Check the ground both battery cable and engine to tub ground

Look at base of hood on underside should see a ground strap
Follow that strap to bolt on firewall the from that same bolt on firewall ground strap goes to rear of engine
That firewall to engine strap needs clean tight connections both ends

Parts darts if foolish and expensive and replacing a PCM on a hunch is a very bad bet

Miss when warmed up can be coil
97-99 4.0 have one coil
2000-2006 4.0 have a coil rail with three coils that each fire 2 spark plugs at a time
Coil rail 4.0 are pretty sensitive about which spark plugs you use as they fire two at a time


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Discussion Starter #10
Show about a week ago I replace the throttle position sensor on my 2000 Jeep Wrangler TJ Sport 4.0 6 cylinder. Today my engine light came on the jeep was surging and hesitating and I decided to go to AutoZone to get a checked. It red code P0122 the throttle position sensor. I have replaced all the major sensors I think as you've read earlier on my post when you hear. Can anyone tell me what the heck is going on I also replace the ECM computer with a plug-in play the original computer is out to be repaired right now it was causing the Jeep just to shut down at any given time so I replace the crankshaft sensor the map sensor the ICM sensor the throttle position sensor and the cam sensor. Any thoughts would be greatly appreciated have a great day Jeep Riders.
 

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Of the sensors you replaced, I hope that you installed Mopar sensors. Our TJs are very particular about that sort of thing.
 

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NGK's are good for O2 sensors, but usually the on top of engine sensors should be replaced with Mopar.

X2 Digger84, The battery cables might look good on the visible surfaces but inside the insulation there could be major corrosion.
 

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Thanks, Digger for my new term.... Parts Darts :)

Yeah unless you specifically know what's wrong, throwing parts can equal throwing more problems into the engine. Hell, I would NEVER touch my PCM unless I knew for sure it was broken, like right do to a known problem then confirm myself type sure. You are likely out over $500 right there by guessing.

Only code I am seeing you say is the TPS, replace with a Mopar one, watch the problem for reoccurance. Don't swap or change any other parts unless you get a provable code.

Get a good analyzer, look at the data streams, the engine is giving you clues but you need to confirm.
 

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Discussion Starter #17
I need some more help jeepers I have replaced the throttle position sensor with a Mopar one and I am still having trouble with the idle and stuttering. Have check all hoses for vacuum leaks.
 
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