ElkySS

iTrader: (6)

not to thread jack but lemme get this straight. ur supposed to drill a 1/64-11/64 hole on the tb through the blades? both or just one? any pics?

Puck

iTrader: (17)

Between the blades in the TB casting, in front of the corresponding hole in the intake manifold. Not in either of the blades.

ElkySS

iTrader: (6)

oh ok. i assume u do this if installing the pipe between the tb and intake doesnt work?

BALLSS

NO

NO

you do this to correct idle issues often associated with aftermarket TB's, especially with head/cam

you do not just blindly drill a hole without confirming what your IAC counts are and your TPS volts are

stock size hole in stock TB is 1/8" "most" people doing this have to make the 1/8" hole larger (or first drilling a 1/8" hole in aftermarket TB). You drill in 1/64" incriments as you measure IAC by scan tool each time. "Generally" the hole winds up being 11/64"-13/64" BUT! this is different for each motor

another method is to crack TB blades open slightly and then drill/slot holes in TPS so you can "rack" it back to within correct vdc range.

in either case you need to have a scan tool to read wtf your IAC counts are so you know when to stop "adjusting"

ElkySS

iTrader: (6)

i have one. datamaster is saying my tps is at a perfect .67 volts and iac counts are 140+

ElkySS

iTrader: (6)

and my blms are way split and inconsistant. i have a bbk 58mm

96LT1355Z28

iTrader: (2)

Sounds like this mod will help you then! Please take time and read the info provided in the links in post #3.

katz_2003

iTrader: (5)

Here you go...this is what I used. http://www.golenengineservice.com/do.../Adj%20TPS.pdf

waltsfastz

iTrader: (4)

Yeah me niether

96LT1355Z28

iTrader: (2)

Opening the TB blades will work if you have a small problem but the trouble with it is your letting idle air into the upper plenum and not routing it through the IAC passages. If you have it open too much you can still get reversion thus creating split BLMs/ fuel trims.

trilkb

iTrader: (4)

is there a hand held device that plugs in to tell you this information? i beleive My car is OBD1 not 2. I wanted to also get something to tell me knock counts to see if im picking up false knock and its probably useful for the TPS settings.

where can i find one?

96LT1355Z28

iTrader: (2)

Most any scan tool that displays live data will show you what you want to know. The big name parts stores will let you use them to pull codes but IDK about letting you take them home to use, they may rent them.

BALLSS

your IAC are way high. They want to be 30-35 (32) at idle with engine at operateing temp and no AC on.

suggest you start by drilling a 1/8" hole and test. drill 1/64" larger each time and re-test.

Buy a few TB gaskets....you will need them for this on/off/drill the TB deal

IAC max out at 160 IIRC so at 140 you have no room left. when you turn the wheel at a stop and add load to your engine, same as turning on AC, you peg the IAC and the car will want to stall.

Drill mod will resolve this.

ElkySS

iTrader: (6)

yea im gonna do both at the same time. just gotta go pick up the pipe

trilkb

iTrader: (4)

when my car is warm the shock of nuetral to drive/reverse will want to kill it lol. Thats why i originally wanted to do this.

So your saying a code reader will also tell me the rest of what i need to know? Just any type?