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Old 08-15-2007, 06:37 PM   #81
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try reseting the idle. unplug the iac motor. start the motor (you may have to have a friend keep it running under the hood with the tb), adjust the idle screw on the tb till the rpm's are sitting where you want them then plug the iac back it.

mine done the same thing and it fixed mine.
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Old 08-15-2007, 09:26 PM   #82
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Quote:
Originally Posted by tls_bmx View Post
try reseting the idle. unplug the iac motor. start the motor (you may have to have a friend keep it running under the hood with the tb), adjust the idle screw on the tb till the rpm's are sitting where you want them then plug the iac back it.

mine done the same thing and it fixed mine.
YOU sir are the man of the hour! :D
After fiddling with the throttle body for hours I tried resetting the idle as tls_bmx suggested.

Here's what I did:
- Cleaned and carefully centered the throttle blade so there was absolutely no sticking when fully closed.
- Pressed out the stock adjustment screw. It wasn't exactly adjustable when I got done with it.
- Replaced that with a small bolt and 2 nuts. Pic later. Worked very well.
- Set the adjustment bolt as low as possible without the blad sticking
- Reinstalled TB
- First tried to start it without touching the IAC and still had some hanging RPMs and idle was higher than I wanted, but better than earlier.
- Unplugged the IAC.. the car sputtered to about 300 RPM but still ran.
- Let the car idle for a minute with the IAC unplugged and it found 700 RPM.
- Shut the car off.
- Plug in IAC connector.
- Started the car and immediately noticed the change.

RPMs are now back to 900 where they were before my meddling and no major hanging RPMs!

Wohoo!
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Old 08-15-2007, 09:33 PM   #83
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^^haha thank you. should i bow
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Old 08-15-2007, 09:40 PM   #84
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^^haha thank you. should i bow
Bow till you're red in the face. Nobody can see you.

I gave you some rep.
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Old 08-15-2007, 09:47 PM   #85
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lol... cool man thanks
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Old 09-03-2007, 01:09 AM   #86
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What I've been up to lately:

- Installed an Innovate LC-1 wideband with square led display.. still figuring out some issues though.
- Moved the vac source of my boost gauge. Now it reads vac and boost.
- Wired up the lights for my gauges because I couldn't see them at night.
I spliced into the dimmable wires of the hvac controls so they dim with the rest of my lights.
- Added a 3" cheapo Summit Racing glasspack (also another thread).
Didn't do much, if anything, to lessen the drone.
I DID however refab the pipes going over my rear crossmember so there are NO more exhaust rattles!
- Routed my catch can vent filter down near the air filter. No more stinky hvac!
- Wrapped my downpipe

Upcoming plans for the next year:
- SPEC stage 3 clutch.
- Torsen Limited Slip Differential
- Something to cure wheel hop.. maybe poly mounts or a torque strap.
- Shorten (cut/weld) wastegate actuator rod to preload spring for even earlier spool
- Stiffer rear springs (has nothing to do with the turbo)

PICS

Innovate LC-1 unit:


LC-1 grounds:


LC-1 display.
No it should not read 9.9 after warmed up and running.
If you know why it does please tell me.
EDIT: Fixed. Had to set voltage-to-AF numbers in LC-1 unit for analog out 1.


Inside of a Summit Glasspack:


Random turbo pic:

Downpipe:
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Last edited by sporadic; 10-02-2007 at 04:36 PM.
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Old 09-03-2007, 01:20 AM   #87
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Pic of my car taken tonight:
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Old 09-03-2007, 08:30 AM   #88
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awesome! check in the duratec forum... egz has a write up on that LC-1... which is where im sure you got the idea from... lol

i installed my autometer wideband yesturday and the engine stays right around 14.7 where autometer's instructions says it should be...
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Old 09-03-2007, 10:54 AM   #89
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at idle and cruise the a/f should fluctuate around 14.7 because of the o2 sensor trimming the stft. at wot the a/f should go down to around 11.5-12 depending on the tune and the set up
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Old 09-03-2007, 05:33 PM   #90
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i havent hit WOT with my wideband... so ill try that out also tls... and ive noticed coming off the highway when i leave it in 5th and coast alittle it peaks at 16.0 it seems and starts blinking... i have the cobalt wideband a/f... i havent read all of the instructions as of yet...
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