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Chris, Shop Foreman
Category: Jeep
Satisfied Customers: 3340
Experience:  Jeep Certified Master Tech
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2004 grand cherokee 4.0 started with error code P0303 anyway

Customer Question

2004 grand cherokee 4.0 started with error code P0303 anyway have replaced #1,3,6 electors, new plugs,new coil packs, MAP, cam shaft synchronizer and cam shafts positioner sensors. ECM is throwing out random codes P0201, P0203, P0300-306, P1297 a temperature sending sensor also but it is unplugged be the engine wants to stall. Anyway this has even going on for 2 months car backfires, engine will shake really bad while driving when you let off the gas pedal. Stutters from a stopped position, loss of power, engine light stays on and sometimes blinks. My mechanic says it needs a new ecm
Submitted: 9 months ago.
Category: Jeep
Expert:  Amedee replied 9 months ago.

Hello and welcome!

My name isCustomerand I can assist you with your question.

Expert:  Amedee replied 9 months ago.

If you clear all of the codes, which code comes back first?

What is the engine vacuum at idle?