Rough Idle

Tiny
91STEALTHRT
  • DODGE STEALTH

Make- Dodge
Modle- Stealth R/T NA
Year- 1991
Mileage- 175,000 recent engine work, including heads.

Bought a 91 dodge stealth R/T NA last summer, ran fine for a while, then the IAC went out. I drove it for a while before I really noticed the idle problem. I replaced the IAC and now when its cold it idles around 2000 rpm and when its warmed up it idles around 600-700. It jumps slightly thought at idle, like someone is giving it a tiny bit of throttle, then it drops to 500 speeds up a little then goes back down over and over again. Also if I give it gas when its just idleing it revs up nice but when I get off the throttle right away it slows down and it almost dies, then comes back up around 600. I checked vacum lines, and the resistence on the IAC is still around 40 ohms on all pins so what else can I look for that would cause a rough idle. I also noticed that the rubber plug that goes in the idle adjustment screw was taken out so someone before me was messing with that. Does anyone know how far in or out it should be screwed at stock settings?
Thanks guys

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Monday, January 8th, 2007 AT 8:14 PM

12 Replies

Tiny
CARUNDELL
  • MEMBER

Hey 91
There is a procedure to reset base idle, it also involves a timing check, though I can't remember the whole procedure. I will pm Service Writer with your dilemma and he can check in Alldata for ya!

Chris

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Tuesday, January 9th, 2007 AT 1:01 PM
Tiny
91STEALTHRT
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Thanks alot for the reply!

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Tuesday, January 9th, 2007 AT 1:30 PM
Tiny
CARUNDELL
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Anytime! He should get back to ya sometime tonight!

Chris

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Tuesday, January 9th, 2007 AT 1:49 PM
Tiny
SERVICE WRITER
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Payback is a bitch :lol:

91stealthrt,
I'll scan what I found into PDF files and send them later. Being a Service Writer, You may not be getting exactly what you need but I'll do what I can :)

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Tuesday, January 9th, 2007 AT 4:49 PM
Tiny
CARUNDELL
  • MEMBER

Don't even go there. You gave me homework last night and this morinin' LOL

Chris

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Tuesday, January 9th, 2007 AT 5:04 PM
Tiny
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I meant this is the payback to me :
And that's why it's a bitch :lol:

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Tuesday, January 9th, 2007 AT 5:10 PM
Tiny
91STEALTHRT
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Any info yets guys? I appreciate the help

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Wednesday, January 10th, 2007 AT 1:17 PM
Tiny
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Did you check your email buck snort? :

I sent you info yesterday and copied Chris. It didn't come back as undeliverable? He got his.

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Wednesday, January 10th, 2007 AT 3:35 PM
Tiny
91STEALTHRT
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Sorry, I just checked. I didn't have anything. :S
sorry yo can try to send it again if you want

bucksnort1988@hotmail. Com

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Wednesday, January 10th, 2007 AT 6:34 PM
Tiny
SERVICE WRITER
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I will re send right now. Maybe the hotmail isn't big enough?

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Wednesday, January 10th, 2007 AT 7:52 PM
Tiny
91STEALTHRT
  • MEMBER

Thanks guys. Not exactly what I was looking for but thanks for the effort. I guess all I wanted to know what is there any other things that could be affecting my idle. Runs fine down the road just at idle if goes up and down a little. I was also looking to see if anyone knew what the stock idle screw setting was. Like how many turns in or out.
Thanks though guys!

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Thursday, January 11th, 2007 AT 12:05 PM
Tiny
91STEALTHRT
  • MEMBER

Figured it out! I am supposed to have 4 small honeycomb filters in my Mass AirFlow sensor "Box" I don't have them there so thats PROBABLY whats wrong. Do you know where to get these small Filters?

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Thursday, January 11th, 2007 AT 1:56 PM

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