High idle on cold start up, hesitation, etc.... - Page 2 - 3000GT/Stealth International Message Center

lawdogg · 04-10-2008, 04:39 AM

Sounds like your IAC may in fact be bad.

I would suggest removing it and testing the resitance over all 4 coils like outlined in the Stealth316 link.

Stealth 316 - ISC Servo Motro

jdshookup · 04-10-2008, 09:52 AM

I've already pulled it out. It is the new model that they show in the pictures. It even looks brand new. I took it apart and everything. I'm thinking whoever owned the car before had already replaced it.

I started to think it was a vac leak, but that doesn't make sense if it doesn't hesitate all the time. I know the gaskets on the intake plenium and the TB are good, because I just changed my plugs and wires, those looked brand new. My plugs even looked new, but I changed them anyway.

I don't know what else is left. My timing belt squeels sometimes when it's wet, but I don't think that is a problem. It doesn't look like it has cracks or anything in it. So, I kinda want to rule out timing issue.

Could possibly be a fuel filter problem, but I have a feeling that if the person before me already did the 120K tune up, then that should have been changed. I bought it at 124K it now has 125K miles on it now. I'm almost thinking it'd be the ECU. But I really cannot go without a car while I send it somewhere to get rebuilt.

Dammit!

Stealthee · 04-10-2008, 09:56 AM

You may want to make sure your SAS screw hasnt been messed with.

Its the screw with a lock nut on it that acts as a stopper for the throttle plate. It is set from the factory and should never be messed with.

If it does get messed with it can cause hesitation issues.

jdshookup · 04-10-2008, 11:14 AM

Isn't that the same thing as the BISS screw?

lawdogg · 04-10-2008, 11:18 AM

I don't know what an SAS screw is, but the BISS doesn't have a lock nut. I wish I could help out more.

jdshookup · 04-10-2008, 11:21 AM

Just so I know what the BISS screw is, it has a rubber top that you have to pull off in order to get to the screw, correct?

lawdogg · 04-10-2008, 11:27 AM

Yes, that's it.

You know, have you looked at your TPS to make sure it's in the right spot? If your throttle sensor is improperly adjusted, that could produce symptoms like the ones you're having.

jdshookup · 04-10-2008, 11:31 AM

What exactly is the TPS? Isn't it around where the IAC is?

lawdogg · 04-10-2008, 11:33 AM

Yeah it's on the front of the throttle body (towards the front of the car) ... do you have the CAS thing or not?

Stealthee · 04-10-2008, 04:16 PM

The SAS is on the backside of the throttle body.

Its an old ass picture thats semi blurry but it should get the point across.

The TPS would bolt on opposite of the spring. in that pic.

04-10-2008, 04:39 AM	#11 (permalink)
lawdogg Wingless 3000GT Club Join Date: Jul 2003 Location: Williamsport, PA Drives: The Speed Limit Trader Rating: (54)	Re: High idle on cold start up, hesitation, etc.... Sounds like your IAC may in fact be bad. I would suggest removing it and testing the resitance over all 4 coils like outlined in the Stealth316 link. Stealth 316 - ISC Servo Motro __________________ 2002 WJ -- 1994 VR-4 -- 1993 ZJ --Canon Rebel XTi

04-10-2008, 09:52 AM	#12 (permalink)
jdshookup Forum Member Join Date: Feb 2008 Drives: 92 Dodge Stealth R/T Trader Rating: (0)	Re: High idle on cold start up, hesitation, etc.... I've already pulled it out. It is the new model that they show in the pictures. It even looks brand new. I took it apart and everything. I'm thinking whoever owned the car before had already replaced it. I started to think it was a vac leak, but that doesn't make sense if it doesn't hesitate all the time. I know the gaskets on the intake plenium and the TB are good, because I just changed my plugs and wires, those looked brand new. My plugs even looked new, but I changed them anyway. I don't know what else is left. My timing belt squeels sometimes when it's wet, but I don't think that is a problem. It doesn't look like it has cracks or anything in it. So, I kinda want to rule out timing issue. Could possibly be a fuel filter problem, but I have a feeling that if the person before me already did the 120K tune up, then that should have been changed. I bought it at 124K it now has 125K miles on it now. I'm almost thinking it'd be the ECU. But I really cannot go without a car while I send it somewhere to get rebuilt. Dammit!

04-10-2008, 09:56 AM	#13 (permalink)
Stealthee Damage Control Join Date: Jul 2003 Location: 1 hr south of Pitt Drives: 1994 Stealth Trader Rating: (74)	Re: High idle on cold start up, hesitation, etc.... You may want to make sure your SAS screw hasnt been messed with. Its the screw with a lock nut on it that acts as a stopper for the throttle plate. It is set from the factory and should never be messed with. If it does get messed with it can cause hesitation issues. __________________ Kbizzle [11:25 P.M.]: my ass is really sore Kbizzle [11:25 P.M.]: this is most displeasing

04-10-2008, 11:14 AM	#14 (permalink)
jdshookup Forum Member Join Date: Feb 2008 Drives: 92 Dodge Stealth R/T Trader Rating: (0)	Re: High idle on cold start up, hesitation, etc.... Isn't that the same thing as the BISS screw?

04-10-2008, 11:18 AM	#15 (permalink)
lawdogg Wingless 3000GT Club Join Date: Jul 2003 Location: Williamsport, PA Drives: The Speed Limit Trader Rating: (54)	Re: High idle on cold start up, hesitation, etc.... I don't know what an SAS screw is, but the BISS doesn't have a lock nut. I wish I could help out more.

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04-10-2008, 11:21 AM	#16 (permalink)
jdshookup Forum Member Join Date: Feb 2008 Drives: 92 Dodge Stealth R/T Trader Rating: (0)	Re: High idle on cold start up, hesitation, etc.... Just so I know what the BISS screw is, it has a rubber top that you have to pull off in order to get to the screw, correct?

04-10-2008, 11:27 AM	#17 (permalink)
lawdogg Wingless 3000GT Club Join Date: Jul 2003 Location: Williamsport, PA Drives: The Speed Limit Trader Rating: (54)	Re: High idle on cold start up, hesitation, etc.... Yes, that's it. You know, have you looked at your TPS to make sure it's in the right spot? If your throttle sensor is improperly adjusted, that could produce symptoms like the ones you're having.

04-10-2008, 11:31 AM	#18 (permalink)
jdshookup Forum Member Join Date: Feb 2008 Drives: 92 Dodge Stealth R/T Trader Rating: (0)	Re: High idle on cold start up, hesitation, etc.... What exactly is the TPS? Isn't it around where the IAC is?

04-10-2008, 11:33 AM	#19 (permalink)
lawdogg Wingless 3000GT Club Join Date: Jul 2003 Location: Williamsport, PA Drives: The Speed Limit Trader Rating: (54)	Re: High idle on cold start up, hesitation, etc.... Yeah it's on the front of the throttle body (towards the front of the car) ... do you have the CAS thing or not?

04-10-2008, 04:16 PM	#20 (permalink)
Stealthee Damage Control Join Date: Jul 2003 Location: 1 hr south of Pitt Drives: 1994 Stealth Trader Rating: (74)	Re: High idle on cold start up, hesitation, etc.... The SAS is on the backside of the throttle body. Its an old ass picture thats semi blurry but it should get the point across. The TPS would bolt on opposite of the spring. in that pic.