Help with odd Idle - Ford Mustang Forum
 
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post #1 of 8 (permalink) Old 09-29-2006 Thread Starter
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Help with odd Idle

I searched and tried what i found, nothing.The car when u start it goes up to 2k then very very slowly drops to just under 1k. When u come to a stop sometime it will idle at 9-1k or it will stick at 1500. Any ideas? i have cleaned the throttle body, clean the iac and and adjusted the tps. If anyone suggests a vacuum leak explain where i should be looking .. I've gone thru and seen nothing.

BTW its the car is an 04 cobra with a bbk twin 65 throttle body.I know that i'm in the wrong forum now that I'm a terminator owner , but what am i supposed to do no one hangs out in the svt section lol.

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post #2 of 8 (permalink) Old 09-29-2006
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Hmmm.........a BBK TB???

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post #3 of 8 (permalink) Old 09-29-2006
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Is there a CEL comeing on? Usually when it runs that rought it throws a code. If you replaced the Tb recently the Throttle Positon Sensor could need adjusted.
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post #4 of 8 (permalink) Old 09-29-2006
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Sorry, I don't mean to sound like a jerk, but if I may ask....why on earth did you go with a BBK TB...those things are notorious for horrible quality...I'm assuming $$$. Accufab FTW!!!

What was the voltage of the TPS? If you can't find a leak then you might want to replace the TPS...Those things are crazy sensitive and sometimes just removing them can cause them to go bad.
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post #5 of 8 (permalink) Old 09-29-2006 Thread Starter
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Quote:
Originally Posted by jjtgiants
Sorry, I don't mean to sound like a jerk, but if I may ask....why on earth did you go with a BBK TB...those things are notorious for horrible quality...I'm assuming $$$. Accufab FTW!!!

What was the voltage of the TPS? If you can't find a leak then you might want to replace the TPS...Those things are crazy sensitive and sometimes just removing them can cause them to go bad.
LOL i didn't put on. It came with the car and your right its a hunk of ****. I'm getting the original back so i can put that on till i can afford a nice single blade accufab and plenum. I cleaned the iac for the second time and the problem is corrected. Still the slightly choppy idle thanks to the pos bbk but other then that good to go. My local Ford is ordering the new part and replacing under warranty. thanks for every ones replies .
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post #6 of 8 (permalink) Old 09-30-2006
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Quote:
Originally Posted by mp23
Is there a CEL comeing on? Usually when it runs that rought it throws a code..
Ha!

No, not really.

The engines in my dyno cell misfire their asses off, and run 20:1 A/F and i never see any codes :eyepoppin
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post #7 of 8 (permalink) Old 10-01-2006
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You may need to actually REPLACE the IAC. I cleaned the hell out of mine, and still had a "hanging idle". I went to NAPA, bought a new IAC and she idles like new now.

1998 SVT Cobra #4941 of 5174 built on June 19,1998
4.30s, Speedcal, WMS CAI, Pro 5.0 shifter, Sniper Tuner, March pulleys, Mac O/R H pipe, Flowmaster orig. 40's, King Cobra clutch, D/S rotors, FRPP 9mm's, Max. Motorsports C/C plates, Termy front control arms, H&R SS springs, MM solid steering rack bushings, Tokico HP struts and shocks, Mac subrames, HID Bi-Xenon 6000k kit, Saleen 18" wheels, Saleen S-281 spoiler, sequential tails
Up Next: Termi diff, 31 spline Axles, LPW girdle, MM LCAs
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post #8 of 8 (permalink) Old 10-01-2006
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Quote:
Originally Posted by markwondi
Ha!

No, not really.

The engines in my dyno cell misfire their asses off, and run 20:1 A/F and i never see any codes :eyepoppin

Yep when my IAC crapped out, it never threw a code.
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