I have a 91 efi stock 460 with an exhaust and headers.
When it’s cold it runs great! Once it warms up to normal operating temperature it falls flat and has no power. It does have a random miss at idle Compression is good (lowest was 125 with no more then 10% difference between cylinders) and no codes are present. I have done the normal tuneup and it didn't help at all.
I was thinking either EGR or O2 sensor. Is there any way to check these?
Thanks for the help
Chris
When it’s cold it runs great! Once it warms up to normal operating temperature it falls flat and has no power. It does have a random miss at idle Compression is good (lowest was 125 with no more then 10% difference between cylinders) and no codes are present. I have done the normal tuneup and it didn't help at all.
I was thinking either EGR or O2 sensor. Is there any way to check these?
Thanks for the help
Chris