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Ron, ASE Certified Technician
Category: Car
Satisfied Customers: 35497
Experience:  ASE Certified Tech
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I have a 2002 deville. With a. P0304. Code. I've changed

Customer Question

I have a 2002 deville. With a. P0304. Code. I've changed coil and all plugs and swapped fuel injectors. Still showing a po304. Not sure where else to look. Any ideas on what next
Submitted: 1 year ago.
Category: Car
Expert:  Ron replied 1 year ago.
Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.
Start first with making sure you have spark out if the coil on this cylinder as well as injector pulse . If you have good spark and injector pulse then run a compression test on the cylinder make sure you have proper compression. Check these things for me and post back with the results and we can work from there .