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Roy, import/domestic specialest
Category: Chevy
Satisfied Customers: 6035
Experience:  ASE master tech for 40 years
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My 07 Suburban has a P0300 diagnostic code and I have

Customer Question

My 07 Suburban has a P0300 diagnostic code and I have replaced the coils but I keep getting the code
JA: Thanks. Can you give me any more details about your issue?
Customer: It first gave me a bad #6 ignition coil code then after replacing them it started running rougher. It idles rough and smokes a little
JA: OK got it. Last thing — Chevy Mechanics generally expect a deposit of about $18 to help with your type of question (you only pay if satisfied). Now I'm going to take you to a page to place a secure deposit with JustAnswer. Don't worry, this chat is saved. After that, we will finish helping you.
Submitted: 1 year ago.
Category: Chevy
Expert:  Roy replied 1 year ago.

good evening my name is ***** ***** I will assist

did you change the plugs??? the missfire code for 6 code be the plug or coil.

the 300 code is another issue. I would have the fuel pressure checked. it is common for low fuel pressure to cause this code to come up. it will make the engine run lean and will trigger miss fire codes from lack of fuel


Customer: replied 1 year ago.
Would that make the service stabilitrak and service traction control message come on?
Expert:  Roy replied 1 year ago.

thats completely different system. you would need to give me the code for the system to narrow down the area of failure


Customer: replied 1 year ago.
There's only one code. P0300
Expert:  Roy replied 1 year ago.

thats for the pcm which does not control the stabiltrack system. that is controlled by the abs system. see if a parts store can read any other codes for you


Expert:  Roy replied 1 year ago.

how are you making out