idles rough, then normal, rough, normal...wtf? - 3000GT/Stealth International Message Center

cryptyq · 08-07-2005, 01:34 PM

as the title says, it's idling erratically...goes between a normal idle and a rough one...when it's idling rough, it's sputters when gas is applied...any ideas? I had it towed home, and now it's idling fine...wtf? this car is my daily driver...any thoughts on this problem are appreciated...

Mitsugirl3kgt · 08-07-2005, 07:15 PM

Didn't you just swap in a new TCU? Did you try resetting the ECU and TCU at the same time?

Caffinated Soap · 08-07-2005, 07:20 PM

How does your IAC look? If you give it gas while it's idling low it will kill it. A good steady idle shouldn't die.

You may want to try backing the idle control screw out a bit. That will bump your idle up more and give the engine more of a cushion when the gas is thrown at it.

Mitsugirl3kgt · 08-07-2005, 07:22 PM

Everyone seems to be having issues with their IAC or TPS lately.

Caffinated Soap · 08-07-2005, 07:24 PM

Mitsu set them to break after peak-sales seasons. It's just one more factor they'll use to get you to buy a new Eclipse.

Mitsugirl3kgt · 08-07-2005, 07:36 PM

I would actually buy a new eclipse. Albert and I sat in one at the Portland Auto Show and they weren't too bad.

Quote:

Originally Posted by Caffinated Soap

Mitsu set them to break after peak-sales seasons. It's just one more factor they'll use to get you to buy a new Eclipse.

Caffinated Soap · 08-07-2005, 07:43 PM

I like the interior, but the bubble butt would need a little help. The front of the car kinda reminds me of a 97 3kgt.

cryptyq · 08-07-2005, 09:26 PM

TPS was checked when the tranny was rebuilt...TCU was just replaced, and that wouldn't have any bearing on idle, as far as I know...if the ECU is going, that would effect idle as it can take two cylinders out of the picture in an instant (I know this from experience)...so, IAC is what? plz excuse me, I still don't know all my acronyms yet...ignition coil pack? what I found odd is how it pops in and out of a normal idle, even right before my eyes...and when it did that, it would consistantly drop and even out to the same respective rpms...I really don't know better, but that seems like electronic/electrical behaviour...also, after the tow, and when it was idling fine, it blew a little darkish exhaust out for a few revs, and then it seemed to be back to normal...am I correct in guessing that would be due to driving the car several blocks on less than 6 cylinders before I got towed? Thx for your help so far...

Caffinated Soap · 08-07-2005, 09:31 PM

Idle Air Control. If you do a search there are a lot of threads around about cleaning them out and having them work great again.

That's just about the only thing I can think of that would have it idle rough and then normal again.

cryptyq · 08-07-2005, 10:11 PM

thx again, man...I'll check that out...

08-07-2005, 01:34 PM	#1 (permalink)
cryptyq MonsterVoodooMachine Join Date: Dec 2004 Location: NY Drives: Black '92 Stealth RT Trader Rating: (14)	idles rough, then normal, rough, normal...wtf? as the title says, it's idling erratically...goes between a normal idle and a rough one...when it's idling rough, it's sputters when gas is applied...any ideas? I had it towed home, and now it's idling fine...wtf? this car is my daily driver...any thoughts on this problem are appreciated... __________________ ...1992 Dodge Stealth R/T is one of 5247...built in 1st week of 08/91...1426th post production car of that model to come out of the plant...19964 other cars of the model year made at the Nayoga plant before your car...56 other cars that were made with both the same interior and exterior color...911 cars with the same exterior color and 649 cars with the same interior color. Exactly Identical 29 (Model, Interior & Exterior color, Equipment, Chassis) Mechanically Identical 1263 (Model, Equipment, Chassis) Same Model+Option Package 3609 Same Model+Build Date 411

08-07-2005, 07:15 PM	#2 (permalink)
Mitsugirl3kgt I've been here way too long Join Date: Jun 2004 Trader Rating: (26)	Re: idles rough, then normal, rough, normal...wtf? Didn't you just swap in a new TCU? Did you try resetting the ECU and TCU at the same time?

08-07-2005, 07:20 PM	#3 (permalink)
Caffinated Soap People are not equal. Join Date: Mar 2004 Location: Cookeville, TN Drives: '93 3kGT Trader Rating: (11)	Re: idles rough, then normal, rough, normal...wtf? How does your IAC look? If you give it gas while it's idling low it will kill it. A good steady idle shouldn't die. You may want to try backing the idle control screw out a bit. That will bump your idle up more and give the engine more of a cushion when the gas is thrown at it. __________________ The Caffy Factor™

08-07-2005, 07:22 PM	#4 (permalink)
Mitsugirl3kgt I've been here way too long Join Date: Jun 2004 Trader Rating: (26)	Re: idles rough, then normal, rough, normal...wtf? Everyone seems to be having issues with their IAC or TPS lately.

08-07-2005, 07:24 PM	#5 (permalink)
Caffinated Soap People are not equal. Join Date: Mar 2004 Location: Cookeville, TN Drives: '93 3kGT Trader Rating: (11)	Re: idles rough, then normal, rough, normal...wtf? Mitsu set them to break after peak-sales seasons. It's just one more factor they'll use to get you to buy a new Eclipse.

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08-07-2005, 07:43 PM	#7 (permalink)
Caffinated Soap People are not equal. Join Date: Mar 2004 Location: Cookeville, TN Drives: '93 3kGT Trader Rating: (11)	Re: idles rough, then normal, rough, normal...wtf? I like the interior, but the bubble butt would need a little help. The front of the car kinda reminds me of a 97 3kgt.

08-07-2005, 09:26 PM	#8 (permalink)
cryptyq MonsterVoodooMachine Join Date: Dec 2004 Location: NY Drives: Black '92 Stealth RT Trader Rating: (14)	Re: idles rough, then normal, rough, normal...wtf? TPS was checked when the tranny was rebuilt...TCU was just replaced, and that wouldn't have any bearing on idle, as far as I know...if the ECU is going, that would effect idle as it can take two cylinders out of the picture in an instant (I know this from experience)...so, IAC is what? plz excuse me, I still don't know all my acronyms yet...ignition coil pack? what I found odd is how it pops in and out of a normal idle, even right before my eyes...and when it did that, it would consistantly drop and even out to the same respective rpms...I really don't know better, but that seems like electronic/electrical behaviour...also, after the tow, and when it was idling fine, it blew a little darkish exhaust out for a few revs, and then it seemed to be back to normal...am I correct in guessing that would be due to driving the car several blocks on less than 6 cylinders before I got towed? Thx for your help so far...

08-07-2005, 09:31 PM	#9 (permalink)
Caffinated Soap People are not equal. Join Date: Mar 2004 Location: Cookeville, TN Drives: '93 3kGT Trader Rating: (11)	Re: idles rough, then normal, rough, normal...wtf? Idle Air Control. If you do a search there are a lot of threads around about cleaning them out and having them work great again. That's just about the only thing I can think of that would have it idle rough and then normal again.

08-07-2005, 10:11 PM	#10 (permalink)
cryptyq MonsterVoodooMachine Join Date: Dec 2004 Location: NY Drives: Black '92 Stealth RT Trader Rating: (14)	Re: idles rough, then normal, rough, normal...wtf? thx again, man...I'll check that out...