Hey all, I'm back. Going to try this again...get the 383 running.
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Joined: Oct 2003
Posts: 1,454
From: MN/WI
Re: Hey all, I'm back. Going to try this again...get the 383 running.
The IAC count can certainly go to zero, that is when the computer is trying to lower the idle, but you either have the throttle blades proped too far open or you have a vacuum leak.
As far as the TPS voltage, .9v is the high limit of the computers acceptable range, and IIRC .2v is the low limit. The car goes into PE mode (WOT fueling and timing) when you hit a certain TPS value. So the legendary mod that you speak of would get you into PE mode at a lower actual throttle position. This isn't necessary in a car that is in proper tune, and the TPS is used for so many part throttle tables that I like to give it a larger range of values to work with.
As far as the TPS voltage, .9v is the high limit of the computers acceptable range, and IIRC .2v is the low limit. The car goes into PE mode (WOT fueling and timing) when you hit a certain TPS value. So the legendary mod that you speak of would get you into PE mode at a lower actual throttle position. This isn't necessary in a car that is in proper tune, and the TPS is used for so many part throttle tables that I like to give it a larger range of values to work with.
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Joined: May 2003
Posts: 6,661
From: LA (lower Alabama)
Re: Hey all, I'm back. Going to try this again...get the 383 running.
Originally Posted by Dave88LX
Gotcha...I think my IAC count is at ZERO right now, not sure how that works. 
I guess I have to close the TB blade some.
Curious...what's it matter between .45-.90V? As long as it's under 1V it shouldn't matter right?
One of the legendary "Mustang 5.0" mods is to set the TPS voltage to .98. Supposedly, it is in theory supposed to but you right on the edge of "off idle" in regards to TPS, instead of having to rotate the TB blades the distance required for .5V before the PCM realizes it's off-idle...something to think about I guess, maybe someone can chime in...
I guess I have to close the TB blade some.Curious...what's it matter between .45-.90V? As long as it's under 1V it shouldn't matter right?
One of the legendary "Mustang 5.0" mods is to set the TPS voltage to .98. Supposedly, it is in theory supposed to but you right on the edge of "off idle" in regards to TPS, instead of having to rotate the TB blades the distance required for .5V before the PCM realizes it's off-idle...something to think about I guess, maybe someone can chime in...
Wow, you have a stock cai, that need to be changed asap.
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