99 jeep grand cherokee, when started and cold, runs fine as temp rises it runs like crap. mis fires and hesitates to go. i have various code thrown for ecu... timing advanced, trans temp sensor,

Asked by Mar 21, 2017 at 09:25 AM about the 1999 Jeep Grand Cherokee Laredo 4WD

Question type: Maintenance & Repair

1 Answer

70

Start by checking the TPS sensor. It relates to almost every symptom you list. Also check the MAP sensor. The TPS sensors are notorious for failure on Jeeps. If you need one purchase from the dealer only. You can buy a cheap one from a big box store, but it will fail early. Chryslers are a better quality actually in this case.

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