1227165 ECU Questions

American GM ECUs and PCMs
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Re: 1227165 ECU Questions

Postby delcowizzid » Mon Jul 30, 2018 11:32 am

header leaks will make the wideband read wrong and cause backfiring out the exhaust
If Its Got Gas Or Ass Count Me In.if it cant be fixed with a hammer you have an electrical problem

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Re: 1227165 ECU Questions

Postby K1ng0011 » Mon Jul 30, 2018 11:58 am

Yah its smooth when I drive it now its really nice even with open loop forced. Not sure why it affected the AE but I am glad at this point that I am on the right track.

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Re: 1227165 ECU Questions

Postby oldn64 » Mon Jul 30, 2018 5:22 pm

As delco has stated manifold leaks are not good for metering devices or smoothness and will make a racquet.

They are one of the worse I have seen and suspect that your original backfire issue did not help these. Good to here it is resolved though!

cheers
oldn64

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