All,
I am trying to straighten out my street tune on my CLASSIC FAST for when I lift the throttle and then mash the gas again (tune PIA engaged lol). Anyway, the problem I am working on is the engine is going to 9.80AFR and lower when I lift the gas and the throttle blade closes. So much that the engine stumbles a little. If I try to press the gas again too quickly, it hesitates and stumbles real bad. The issue as I see it, is the computer uses the same cell numbers during deceleration as acceleration in some cases. The tracer (little white bubble) goes right through a few cells, that I have identified, when I lift the gas. I have decreased these numbers, but I can only go so low for the very same cells are used to provide fuel when the gas is reapplied. I am aware not to create a lean hesitation on acceleration thus I am caught. I could be wrong (prob so) about my thinking. I know this is a very tricky thing to work out, so that is why I am asking for some help.
Thoughts so far:
1) Might be the case that when you quickly close the throttle body you are cutting off the air supply before the computer can react(maybe) and so have have a surplus of fuel. But I can be convinced that the computer is very fast and can react with the proper fuel adjustments.
2) What about DFCO is this a real thing in the classic FAST
3) Maybe the IAC is not fast enough to compensate. Is this because it could be clogged and needs to be cleaned, or is there an upgrade IAC that is faster the the stock one.
Thank you
I am trying to straighten out my street tune on my CLASSIC FAST for when I lift the throttle and then mash the gas again (tune PIA engaged lol). Anyway, the problem I am working on is the engine is going to 9.80AFR and lower when I lift the gas and the throttle blade closes. So much that the engine stumbles a little. If I try to press the gas again too quickly, it hesitates and stumbles real bad. The issue as I see it, is the computer uses the same cell numbers during deceleration as acceleration in some cases. The tracer (little white bubble) goes right through a few cells, that I have identified, when I lift the gas. I have decreased these numbers, but I can only go so low for the very same cells are used to provide fuel when the gas is reapplied. I am aware not to create a lean hesitation on acceleration thus I am caught. I could be wrong (prob so) about my thinking. I know this is a very tricky thing to work out, so that is why I am asking for some help.
Thoughts so far:
1) Might be the case that when you quickly close the throttle body you are cutting off the air supply before the computer can react(maybe) and so have have a surplus of fuel. But I can be convinced that the computer is very fast and can react with the proper fuel adjustments.
2) What about DFCO is this a real thing in the classic FAST
3) Maybe the IAC is not fast enough to compensate. Is this because it could be clogged and needs to be cleaned, or is there an upgrade IAC that is faster the the stock one.
Thank you