Another tune cold air question

[robmustang201528]

Car made 410 at the wheels with a cold air and tune. Tuner said computer or engine was taking the timing out of the engine. Said it could be something with the fuel that I filled up with. Does that sound right? I didn't use shell I used exxon supreme. Another question is 410 a good number with a tune and JLT cold air?

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[Barrel]

Car made 410 at the wheels with a cold air and tune. Tuner said computer or engine was taking the timing out of the engine. Said it could be something with the fuel that I filled up with. Does that sound right? I didn't use shell I used exxon supreme. Another question is 410 a good number with a tune and JLT cold air?

My shop had to drain my tank and fill it again with 93 before the computer was happy. Gas station fuel quality can vary. I also put in a bottle of octane booster with every tank to be sure the fuel is good enough to run.

 

[beefcake]

very fuel is different,

if the knock sensors are pulling time, then more than likely fuel

 

[robmustang201528]

What fuel would your recommend? what fuel do you use?

 

[Choking_Victim]

What Afr is being targeted? Is the stock gauge able to tattle back as fast as a aftermarket WB? I'd assume 12 to 12.8 at the leanest for N/A ?

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