Removed emissions, car runs bad at low rpms.

Whizbang · 09-09-2008, 05:18 PM

trying to figure out where something went wrong. I also removed the thermowax, so i expected some cold resistance towards idling but this is also just plaining running bad at low rpms.

Did most of the emission removal (left the spider rack since i didnt have fuel line) but now the car seems to run real choppy up til 2000 rpms.....

I am running the FPR off the bottom vac nipple on the back of the UIM. That showed vacuum on the boost gauge, where as the top two didnt. So i am sure the FPR is seeing signal.

Other than that, the pressure sensor is seeing signal as well.

I can find no obvious vacuum leaks, but i wont rule any out, i just double checked the hell out of everything and i can't find it.

TPS and coolant sensor are plugged in.

any ideas?

Phoenix7 · 09-09-2008, 06:24 PM

did you check to make sure your TPS is within specs?

Take a break and go over everything once you're calm.

Whizbang · 09-09-2008, 09:20 PM

so curve ball here.

figure out a few things, but the end issue is that throttle is now getting stuck at high rpms. I pull the TB out and sure as hell the butter flys are getting stuck. I removed the secondary butterflys and related.

Interesting fact here. I HAVE SIDE TO SIDE PLAY IN THE RODS AND BUTTERFLYS. Almost 1 to 1.5mm. I think this might be problem....

I can still feel it binding in the primary. I used about 10 dollars worth of throttle body cleaner, felt better. Seemed to actually work, but i stalled it. fired it up touched the throttle...bam....5000 rpms...and staying.

So i think i need a new throttle body.

09-09-2008, 05:18 PM	#1
Whizbang Respecognize! Join Date: Jul 2008 Location: Δx = ħ/2Δp iTrader: (5) Posts: 3,190 Rep Power: 20	Removed emissions, car runs bad at low rpms. trying to figure out where something went wrong. I also removed the thermowax, so i expected some cold resistance towards idling but this is also just plaining running bad at low rpms. Did most of the emission removal (left the spider rack since i didnt have fuel line) but now the car seems to run real choppy up til 2000 rpms..... I am running the FPR off the bottom vac nipple on the back of the UIM. That showed vacuum on the boost gauge, where as the top two didnt. So i am sure the FPR is seeing signal. Other than that, the pressure sensor is seeing signal as well. I can find no obvious vacuum leaks, but i wont rule any out, i just double checked the hell out of everything and i can't find it. TPS and coolant sensor are plugged in. any ideas? __________________ For current updates and event coverage check out Follow on Twitter! @WhizbangRally Whizbang Rally's Webpage \| Facebook

09-09-2008, 09:20 PM	#3
Whizbang Respecognize! Join Date: Jul 2008 Location: Δx = ħ/2Δp iTrader: (5) Posts: 3,190 Rep Power: 20	so curve ball here. figure out a few things, but the end issue is that throttle is now getting stuck at high rpms. I pull the TB out and sure as hell the butter flys are getting stuck. I removed the secondary butterflys and related. Interesting fact here. I HAVE SIDE TO SIDE PLAY IN THE RODS AND BUTTERFLYS. Almost 1 to 1.5mm. I think this might be problem.... I can still feel it binding in the primary. I used about 10 dollars worth of throttle body cleaner, felt better. Seemed to actually work, but i stalled it. fired it up touched the throttle...bam....5000 rpms...and staying. So i think i need a new throttle body. __________________ For current updates and event coverage check out Follow on Twitter! @WhizbangRally Whizbang Rally's Webpage \| Facebook