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My 07 Suburban has a P0300 diagnostic code and I have

Customer Question
My 07 Suburban has...

My 07 Suburban has a P0300 diagnostic code and I have replaced the coils but I keep getting the code

Mechanic's Assistant: Thanks. Can you give me any more details about your issue?

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

Submitted: 2 years ago.Category: Chevy
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Answered in 18 minutes by:
2/24/2016
Chevy Mechanic: Roy, import/domestic specialest replied 2 years ago
Roy
Roy, import/domestic specialest
Category: Chevy
Satisfied Customers: 7,888
Experience: ASE master tech for 40 years
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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

Roy

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Customer reply replied 2 years ago
Would that make the service stabilitrak and service traction control message come on?
Chevy Mechanic: Roy, import/domestic specialest replied 2 years ago

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

Roy

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Customer reply replied 2 years ago
There's only one code. P0300
Chevy Mechanic: Roy, import/domestic specialest replied 2 years 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

Roy

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Chevy Mechanic: Roy, import/domestic specialest replied 2 years ago

how are you making out

Roy

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