'91 Olds Regency Idle Issue.

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dandyd
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'91 Olds Regency Idle Issue.

Post by dandyd »

Just tonight my Olds started running down the road (without foot on Accelerator) at about 35-40 mph. Upon getting it home the engine idles really fast and will not come down. TPS? Anything else to check? Thanks.
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harofreak00
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Re: '91 Olds Regency Idle Issue.

Post by harofreak00 »

First unplug the TPS and see if the idle changes.

Is the throttle plate stuck open? Remove the airbox/MAF screen to make sure it is moving freely.
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dandyd
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Re: '91 Olds Regency Idle Issue.

Post by dandyd »

Idle does not change with unplug and thottle plate working fine.....IAC?
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myfirstbonnie
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Re: '91 Olds Regency Idle Issue.

Post by myfirstbonnie »

SES light?
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dandyd
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Re: '91 Olds Regency Idle Issue.

Post by dandyd »

No check engine light at all.
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J Wikoff
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Re: '91 Olds Regency Idle Issue.

Post by J Wikoff »

Unplug the IAC and start the car. See if the condition changes. Try plugging it back in while it's running. Then stop the engine, plug it back in, restart, and unplug it again. See if any of those change the condition.

Also, look for any unhooked/broken vacuum lines, and listen for hissing of a vacuum leak.
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dandyd
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Re: '91 Olds Regency Idle Issue.

Post by dandyd »

Plug IAC...cleaned it off/out....pulled MAF, cleaned electrodes with electronics contact cleaner.....put back together......wa-la!! Runs like a top....Thanks
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