Question about 2002 Saturn Sl

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How to find and clean the IAC on a 2002 Saturn sl1?

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First disconnect the air vent to the throttle body. The TB will come off with 2 10mm bolts. Dont lose the gasket. Undo the throttle cable, and 2 vacuum hoses on top. Be careful not to lose the spacer on the vacuum hoses. Take the 2 10mm bolts out and remove the TB. The AIC is bolted on the side under the TPS throttle positioning sensor. It can be removed with a torex socket or screw driver. When you take this off be careful not to lose the O ring. Spray the plunger down with brake cleaner and spray the throttle body down too, especially where the AIC fits into the flange. When you are cleaning the AIC Dont push it in or force it to move. It's not supposed to move by hand. Now, the back of your throttle body maybe [will be ] carboned up, you must spray this and scrape the carbon off. Get all the dirt off and make sure the vacuum holes are clear and the flap closes flush. Replace the opposite of removal. What are the car's symptoms? Over idling? If so, take the can of brake cleaner directly onto the intake manifold gasket. Near the power steering pump and across . Spray this directly on while car is running. If the idle changes at all, your intake manifold gasket is shot. These cars are well known for this , that is why I added that info. I just replaced my own last week. Let me know how you make out. If this was helpful, please rate solution

Posted on Jan 16, 2013

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Posted on Jan 02, 2017

SOURCE: Timing chain or Belt?

hi  it has a timing chain

Posted on Jan 25, 2009

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SOURCE: egr valve on a 2002 Saturn SL1

Take off air breather tube,you should see a cone shaped part, on top and at back of engine right by the gas pedal cable. Remove the 2 10mm bolts, and it should come right off.

Posted on Mar 16, 2009

Molson02536
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SOURCE: 2002 Saturn SL1 has transmission problems, lost

Sorry but no. Check your fluid level and see if your transmission fluid is burnt. Good luck

Posted on Apr 08, 2009

  • 77 Answers

SOURCE: Saturn SL 2002 High Idle

Intake manifold gasket. Leaking where intake meets head.

Posted on May 07, 2009

ZJLimited
  • 17970 Answers

SOURCE: 2002 Saturn SL1 check engine light code P0303

For old models, Saturn/GM also used the same material fiberglass gasket in your model, you almost certainly have a leak from a crumpled, sucked-in gasket as I suffered (and many others). I would say going to Saturn dealership to make repairs is probably not good idea if they are going to put in the same GM intake gasket part. Maybe possible to specify Felpro gasket with whatever shop you go to if you don't do the repair yourself. I would not go too long with your car in that condition as there is localized leaning at your cyl-3, that could cause a burnt exhaust valve there.

The exhaust is extra hot venting out that cylinder. P0303 is misfire at cyl-3. Mine was P0301 (cyl-1). You may get P0507 once in a while when PCM fails to control the fast idle caused by the leak under certain conditions. Most of the time, it is very slow idle caused by 3 cylinders running. You run smoother in cold idle because the IAC opens up to increase idle and end up lowering the manifold vacuum, so the reduced vacuum causes less leaking at the failing intake manifold gasket.

I'd say try cleaning everything with your ignition before replacement; Idle problems could be caused by engine coolant sensor (ECTS). Are you sure it was changed? Did they put on a new wire connector along with it?

Hope helps.

Posted on Dec 29, 2009

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Your Idle Air Control (IAC) valve may be dirty with carbon, simple fix with throttle body cleaner through the IAC passageway through the throttle body. Make sure it's throttle body cleaner and not carburetor cleaner, the carb cleaner is to corrosive to the gaskets used on the throttle body.
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Sounds like a dirty IAC (Idle Air Control) valve. It is located on the throttle body. Remove it and clean it throughly as well as the throttle body underside as well where a lot of carbon build up is.

However, since it is such a high idle, check for any vacuum leaks. Check your hoses and lines running inside the engine bay, specifically near the intake. Spray some carb cleaner around while the engine is running to see if you can hear or see a leak. Check the intake gasket as well.

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