TB screw
Thread Starter
Launching!
Joined: May 2004
Posts: 295
Likes: 0
From: Dallas, Tx
TB screw I got the ls1edit (mods are Hooker Lt's, X pipe, F1 cam specs are 230/226 .591/.569 114, and lid) thats aboit it for horse power mods, and when they were tunning it they messed with the screw on the TB (i guess to get it to idle or what not) when i was driving it home it wouldnt slow down once i let off the gas, it would maintain speed or the car would actually speed up after i let off the gas. So i got home and tightened the screw a little, my question is, is that ok to do or will it mess with the edit?
Screw needs to let the blade close, to get you onto
the idle program. If not the TPS voltage will be high
and some stuff may be not so stoplight-friendly. The
flip side is that if they jacked with the hardware, then
maybe their tune is not as complete as it ought to be.
That doesn't look like so big a cam that idle can't be
fixed by proper tune. Tuning against improper mechanical
blade position is not a proper tune. But whether it's an
improper blade position, is all about TPS voltage and
blade bind. I believe you want the blade stop screw,
rather than blade-body interference, to set the closed
position (no wear, no crust-up snagging etc.). Measure
TPS (blue to black) wire voltage at idle, looking for
something under 0.65V on a DVM or scanning tool.
A 0% TPS interpreted reading is OK too.
The "cruise control effect" may be a tuning artifact or
may go away with idle relearn, and unrelated to the
stop screw, too.
the idle program. If not the TPS voltage will be high
and some stuff may be not so stoplight-friendly. The
flip side is that if they jacked with the hardware, then
maybe their tune is not as complete as it ought to be.
That doesn't look like so big a cam that idle can't be
fixed by proper tune. Tuning against improper mechanical
blade position is not a proper tune. But whether it's an
improper blade position, is all about TPS voltage and
blade bind. I believe you want the blade stop screw,
rather than blade-body interference, to set the closed
position (no wear, no crust-up snagging etc.). Measure
TPS (blue to black) wire voltage at idle, looking for
something under 0.65V on a DVM or scanning tool.
A 0% TPS interpreted reading is OK too.
The "cruise control effect" may be a tuning artifact or
may go away with idle relearn, and unrelated to the
stop screw, too.
