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,
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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