Well I installed the GM S/C on my car last weekend. I brought it in to get flashed, and it was running like crap on my way in. The tech's managed to reflash the comp, fix a few problems, and now the car is running, however, she's idling at 4000 RPM. WTF is going on. Its costing me 80$/hour on labour, and they are having issues figuring it out.

Ill elaborate a little. The install went as smoothly as I expected with a few mishaps. My friend who was helping me install the blower ripped the primary 02 sensor wires out of their connector. That has been solved. He also ripped the EVAP Purge solenoid wires out of their connector as well. That has been solved as well. Apparently there was a misfire on #2, the spark plug boot wasnt on properly, that has been solved. In my kit, which i bought used from Qwik2k2z24, I didn't have the Evap Vaccuum Line, we made one out of some air hose we had laying around. I doubt this is causing any issues. Also, my friend was taking the 2 bar map sensor off the tb, because I told him i needed the stock map sensor on until the reflash. While taking it off, he snapped the sensor. 300$ later, I got a new map sensor, and its on the car and the car has been flashed with the proper VCI# for manual transmission.

As you can see, quite a few little problems happened and have been solved. Although, im totally confused as to why the car is idling at 4000 rpm. I still dont have premium gas in my car, I have approximately 1/3 of a tank of regular gas. I doubt that would cause the car to idle so badly. The car is running way to rich. Can anyone help?

this might be a wild shot..but i'd suggest looking at the throttle cable and/or the throttle stop

and try to look into the IAC

Are you sure the new sensors are wired properly? Just thinking maybe a wire is crossed and could be sending the wrong signal. I know I have had no problem with mine. Even on regular gas the car didn't act funny at all.

ur friend should not be working on cars lol! but yea chekc all the wires to the sensors maybe the wires are crossed or something, goodlluck man hope u figure it out

thanks for the answers, ill head to the GM dealership that my car is getting worked on and see if they tried any of those and if not, do them.

IAC
Happened to me.
Its a small boot that goes to the TB.



Save a Tranny, Roll-on
15.3@88m.p.h.(I/E)
15.2@94m.p.h.(S/C'd)
15.5@89m.p.h.(Stock GTP)

idling at 4000 rpm = vacuum leak... a big one. Your car runs off of air and the computer compensates with fuel. There is no level of sensor failures or anything else that could make the air come out of nowhere and help burn fuel. Look around for a disconnected vaccuum line... Usually that wont let it idle so high but with the blower it may a vacuum leak to have more of an effect. If your brake pedal is stiff, it is the booster line. A good trick is to throw a tiny bit of flour in the air and watch where it gets sucked in it.



Cardomain|Myspace

Well Kris, first of all, you shoulda got Bill and I to install it on your way home, we know how to work on cars, unlike your friend that seems to know next to nothing.
I would definately say that it is a vacuum leak, a BIG one at that.

Well, apparently there was no Vaccum leak whatsoever. The techs are claiming they think its my PCM. They are replacing it as a warranty issue. Im just wondering, how the hell is this possible? Why would my PCM be fine for 4 years, then they touch it and all of a sudden I have a bogus PCM? I have to call the BS flag on this one. I have a feeling that they probably screwed the PCM when they flashed it. Im very upset because now I have to cancel a show this weekend, and I have a 1000$+ bill for labour. It took them over 12 hours of labour at 80$/h to diagnose this. WTF took them so long?

Its not easy to find diagnose and find a problem like this. I was thinking though, you sure the blower is right up to the block and sealed properly? Because I know the bottom 2 bolts are a royal pain in the ass to tighten proplery. Also, did you put that little cap on the throttle body to cover up the vacuum port?

Wow we did 2 in 4 hours and both of them started up like stock and run mint.....

-Chris-



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Slowly but surely may some day win this race...