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Jim, ASE Certified Technician
Category: Dodge
Satisfied Customers: 1317
Experience:  ASE Certified A6,A8,L1 and California Licensed Smog Technician
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2005 Dodge: with a 3.7 V6..cylinder 4 misfire..coils..fuel injectors

Customer Question

I have a 2005 Dodge 1500 with a 3.7 V6 with a code of PO304, cylinder 4 misfire. We have changed spark plugs, switched coils between different cylinders and fuel injectors, ran a compression check with no big difference between compression. Truck not running out of fuel. Don't think it's the catalytic converter because we have no loss of power or rotten egg smell in the exhaust. That's all the stuff that we have ruled out. What would be our next step, or is there a normal fix to this problem?
Submitted: 5 years ago.
Category: Dodge
Expert:  Jim replied 5 years ago.

Jim :

We have seen this problem caused by carbon build up, the following should be done.. Run top engine cleaner through the engine when fully warmed up.

Shut off the engine and let it set for 2 hours.

Start the engine and run it hard down the road to clear out carbon.

Jim and other Dodge Specialists are ready to help you
Expert:  Jim replied 5 years ago.
Let me know if you need further assistance