Emissions....I think!!! - JeepForum.com
 
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post #1 of 5 Old 08-17-2013, 08:25 PM Thread Starter
bobdeesr
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Join Date: Dec 2009
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Emissions....I think!!!

My 2002 Jeep Grand Cherokee is acting up. specifically, it started out with a check engine light on. I replaced the TPS and the IAC valve. All that did was turn off the "Check engine light". I thought I solved my problem. The problem is once the car reacheds operating temperature (210 degrees), it start to act up. I could be driving 40 miles an hour, and all of sudden the tach goes from 2K to ZERO, and if I'm lucky it will recover, and I'l keep driving. Other times it will stall, and I have to restart it and keep going. Also, when I resume after stopping at a stop sign, it will completely stall.
Has anybody have experienced these problems, even after what I have already done? I appreciate your feedback, as I want to get back to enjoying my Jeep.

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post #2 of 5 Old 08-18-2013, 10:55 AM
Olese
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I had a similar issue, got worse when it warmed up and it was the map sensor. Does it post an error code when you do the on/off 3 times thingy?
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post #3 of 5 Old 08-18-2013, 11:00 AM Thread Starter
bobdeesr
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No, when I installed the throttle position sensor and the idle air valve control, the check engine light went out. But I am still having the same characteristics
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post #4 of 5 Old 08-18-2013, 11:01 AM Thread Starter
bobdeesr
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I was thinking next the camshaft or crank sensors, but I don't want to keep dumping money into sensors with no results. But if that will fix the problem, I have no problem purchasing them
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post #5 of 5 Old 08-18-2013, 11:16 AM
Olese
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Turn the key all of the way on and off 3 times leaving it on the last time. Read what it says on the odometer. If it says 'done', then it didn't find a code, otherwise an error code will appear.
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