Idle Issues?!

TMASTER · 06-11-2003, 03:32 PM

Problem: My car has a slight miss or rough idle, but when I rev it up steady, it runs smooth. Also when im in the car, I rev it up and it will come back down to 1100 RPm's and sit for 2 seconds, then it drops back to 700 rpms, like normal.

I bought the car doing this, and Ive modified it and its exactly the same still, lol! Ive checked the vaccum lines, and they all seem soild. I have a new cap, rotar, plugs, wires, heads, intake.
Iv'e cleaned the IAC also and that didnt help. Timming doesnt matter either.
Im seeing if you guys would have some ideas on what to check. I dont want to take it in and spend like $70 to diagnose it. Im a cheap sob.

drtbiker · 06-11-2003, 11:53 PM

tps??? usually if it is a computer related issue to a idle problem it leads to the tps make sure it is set from the range of .95-.98

later

TMASTER · 06-12-2003, 10:02 AM

.98 volts is set too

GhettoPop · 06-12-2003, 10:45 AM

Did you check the throttle body? I noticed mine always gets dirty and hurts idle. Gumout TB cleaner works wonders.

06-11-2003, 03:32 PM	#1
TMASTER Registered Member Join Date: Sep 2002 Location: TEXAS Posts: 161	Idle Issues?! Problem: My car has a slight miss or rough idle, but when I rev it up steady, it runs smooth. Also when im in the car, I rev it up and it will come back down to 1100 RPm's and sit for 2 seconds, then it drops back to 700 rpms, like normal. I bought the car doing this, and Ive modified it and its exactly the same still, lol! Ive checked the vaccum lines, and they all seem soild. I have a new cap, rotar, plugs, wires, heads, intake. Iv'e cleaned the IAC also and that didnt help. Timming doesnt matter either. Im seeing if you guys would have some ideas on what to check. I dont want to take it in and spend like $70 to diagnose it. Im a cheap sob.

06-11-2003, 11:53 PM	#2
drtbiker Registered Member Join Date: Jan 2002 Location: Mt. Prospect,IL Posts: 474	tps??? usually if it is a computer related issue to a idle problem it leads to the tps make sure it is set from the range of .95-.98 later __________________ 87-ford-mustang-SOLD! mods: 3:73's, off road h-pipe, b303 cam in gt- 40 motor w/ Power Plus intake, edelbrock 70mm tb & egr spacer, 72mm C&L, bbk long tubes, tremec tranny, centerforce dual friction clutch, upr and lwr CA's 255lph FP and soon more to come.... when i have money again SOME ADVICE Don't do burn outs in reverse it is very expensive New times with dead hook on dr's 13.27@103 with 2.0 60 foots w/100lb system Fastest time to date: 12.8@113

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06-12-2003, 10:02 AM	#3
TMASTER Registered Member Join Date: Sep 2002 Location: TEXAS Posts: 161	.98 volts is set too

06-12-2003, 10:45 AM	#4
GhettoPop Gimme a Drink! Join Date: Dec 2002 Location: NYC Posts: 694	Did you check the throttle body? I noticed mine always gets dirty and hurts idle. Gumout TB cleaner works wonders.