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sprinkles08
sprinkles08, ASE Certified Technician
Category: Jeep
Satisfied Customers: 21570
Experience:  Chrysler/Dodge/Jeep Master Certified, ASE Master and Advanced Certified, Trans and Hybrid Specialist
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As soon as it warms up it starts running like the timing is

Customer Question

as soon as it warms up it starts running like the timing is retarted
JA: What is the make/model/year of your car?
Customer: 94 grand cherokee
JA: Are you fixing your Grand Cherokee yourself? What have you tried so far?
Customer: dist cat. cam pos sen,crank pos sensormass air flow
JA: How long has this been an issue? How many miles are on the car?
Customer: 160.000
JA: Anything else you want the mechanic to know before I connect you?
Customer: nope
Submitted: 17 days ago.
Category: Jeep
Expert:  david craig replied 17 days ago.

Hi Im David, thanks for visiting the site. why are you replacing all of these parts? are they testing bad?

Expert:  david craig replied 16 days ago.

hello????

Expert:  david craig replied 16 days ago.

do you still need assistance??????

Expert:  david craig replied 15 days ago.

do you still need assistance????????

Expert:  david craig replied 14 days ago.

..

Expert:  sprinkles08 replied 12 days ago.

Hello and welcome to JustAnswer!

I believe you may be describing a weak upstream oxygen sensor heater. Does it run ok initially when the engine is started, it goes through a period where it hesitates, backfires or possibly dies, and then runs ok when the engine is hot?