1997 Saturn SC1 IDLE VARIES ON COLD STARTS

Tiny
TITI44
  • MEMBER
  • 1997 SATURN SC1
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 125,000 MILES
I JUS BOUGHT THE VEHICLE AND WHEN I FIRE IT UP AFTER IT'S BEEN STOPPED FOR A COUPLE OF OURS, IT "STUTTERS" AT IDLE.

ONCE I'VE GONE WHERE I WANT TO GO AND RESTART IT, IT TURN FINE.

COULD IT BE A SENSOR OF SOME SORT THAT I DIRTY OR NEEDS TO BE REPLACED?
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Friday, May 28th, 2010 AT 4:05 PM

5 Replies

Tiny
RASMATAZ
  • MEMBER
Clean out the idle air control valve and see what happens.
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Friday, May 28th, 2010 AT 4:08 PM
Tiny
TITI44
  • MEMBER
Wow ! That was fast !

Where is it exactly on the engine?

Can I do this myself or need to take it in the shop.
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Friday, May 28th, 2010 AT 4:44 PM
Tiny
RASMATAZ
  • MEMBER
It's located on the throttle body assembly-see diagram below:


http://www.2carpros.com/forum/automotive_pictures/12900_i_1.gif



REMOVAL
Turn ignition Off.
Remove air intake tube and resonator.
Remove electrical connector from the IAC valve.
Remove screws and IAC valve. NOTE: The IAC valve is an electrical component and must not be soaked in any liquid solvent; otherwise damage could result.
Remove O-ring from IAC valve and discard.

INSTALLATION
Clean the IAC valve seating surfaces on the throttle body to assure proper seal of the new O-ring and contact of the IAC valve flange. NOTE: Before installing a new IAC valve, retract the pintle using the Scan tool. Refer to Scan tool operating instructions. NOTE: Normal wear of the IAC pintle, characterized by a ring around the cone, is not an indication of a bad IAC valve.
Lubricate new Oring with clean engine oil and install on IAC valve. NOTE: If replacement is necessary, be sure to replace with an identical part. IAC valve pintle shape and diameter are designed for specific applications.
Insert IAC valve in throttle body.
Install IAC valve attaching screws using thread coating, Saturn P/N 21485277 (Loctite 242 Threadlocker or equivalent).
- Torque: 3 N.m (27 in-lbs)
Connect electrical connector to IAC valve. Push in connector until a click is heard and pull back to confirm a positive engagement.

http://www.2carpros.com/kpages/auto_repair_manuals_alldata.htm
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Friday, May 28th, 2010 AT 10:49 PM
Tiny
TITI44
  • MEMBER
HOW WOULD I GO ABOUT CLEANING IT, ANY PREFERED CLEANING PRODUCTS?
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Monday, May 31st, 2010 AT 1:26 PM
Tiny
RASMATAZ
  • MEMBER
Carb cleaner/decarbonizer
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Monday, May 31st, 2010 AT 4:16 PM

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