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  #1  
Old 03-17-2014, 05:11 PM
1990 NC SSP 1990 NC SSP is offline
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Default Please help! Idling issues.

My 1990 NC SSP will not idle and stay running unless I keep my foot on the accelerator. So far I have checked for vacuum leaks, replaced IAC, TPS, fuel filter. Also went by Advance auto to see if they could check codes, but the said the oldest they check is 1995. All help is greatly appreciated.
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Old 03-17-2014, 08:37 PM
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John10608 John10608 is offline
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try watching this. Mine was idleing high. I adjusted the TPS and it brought it down to where it's suppose to be.

This might help, might not. Try searchign on YouTube anything about Adjusting Throttle or TPS or anything to try different things to get it fixed.

Did you put a new TPS on it ? It may need adjusted if so.
It's easy to do and worked for me.

Hope this helps some.
http://www.youtube.com/watch?v=wQXnMku7UHE

Also, make sure you use Throttle Body Cleaner, not carb cleaner !!!
Clean everything with it, it helped me.
John
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Old 03-17-2014, 08:43 PM
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This is the one I watched that help me fixed mine.

http://www.youtube.com/watch?v=HUwr0g5Qn7s
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Old 03-17-2014, 08:57 PM
1990 NC SSP 1990 NC SSP is offline
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Default Thanks, I will purchase a voltage meter and try the TPS adjustment.

I will post my results after the weather permits and after I purchase a voltage meter. Thanks for the help.
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Old 03-19-2014, 06:32 PM
1990 NC SSP 1990 NC SSP is offline
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Default Still trying to resolve idling issue.

I purchased a voltimeter and obd1 code reader for my birthday. Hopefully I will be able to figure why my car will not idle unless I keep my foot on the accelerator lightly. As soon as I take my foot off, it cuts off. I am very frustrated, but I will not give up. It is my daily driver due to giving my other car to my 16 year old daughter. Will try to adjust my new TPS with the voltimeter first. Then I will search for codes. My service engine is not on though. Thanks again for the help.

Randy
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Old 03-19-2014, 06:40 PM
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Also... adjust the idle screw, screw it in some until it starts to idle by itself.
I fixed the CHP Museum's mustang that way. It had the same problem as you are having.
It was screwed all the way out.
Put a newer TPS on it, adjusted it and the idle screw.

Ran perfectly after all of that. A little throttle body cleaner, adjust the TPS and the idle screw. See what happens.

Best
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Old 03-19-2014, 08:22 PM
1990 NC SSP 1990 NC SSP is offline
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Default Thanks for the help. Will try and post results asap.

Is the idle screw adjusted with an Allen wrench? I will try adjusting it tomorrow and will post results. Thanks again.
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Old 03-22-2014, 03:38 PM
1990 NC SSP 1990 NC SSP is offline
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Default Still need help with my 1990 NC SSP idle issues.

I adjusted my new TPS and I also reset my idle. When it is cold I still have to keep my foot on the accelerator, but after it warms up, it idles pretty level. Do you guys think I should adjust my throttle body set screw or what recommendations do you guys have. I appreciate all of the help.
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Old 03-23-2014, 09:22 AM
1990 NC SSP 1990 NC SSP is offline
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Default Once I burn more of my 93 octane out I will add 87/89 octane.

Is it okay to add Sea Foam or other cleaners once a month? Will post as soon as I have an update. Hopefully when I get most 87/89 octane fuel in my car it will help the cold idle issue I have. I thought that putting 93 octane in my car was helping, little did I know that it could be hurting my car. Thanks again for help.
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Old 03-23-2014, 12:59 PM
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Sounds like you fixed some of the problem. Outside of taking the car to a mechanic, I'd drive it around for a while, try to use up a tank of gas, at the same time stopping and using Throttle Body Cleaner as often as you can.

New fuel is good, in case you have seperation in this new junk they are selling us. If this fails to fix it, I guess I'd be going to a mechanic as I am somewhat limited on mechanical issues.

Sometimes a computer can pin point the issue, saves loads of time.
Best
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