Question about 2000 Saturn SL

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In cold weather thecar starts`ok but the rpms go to 2000 and slowly returns to around 1200 and stays there

When it is hot, I need to crank for a long period before it will start. If thetemp is around 75 to 80 it starst with a short crank

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I went through the same thing on my 02 saturn last week. The very first thing I would do is start car, spray some brake cleaner, or even wd 40 directly onto the Intake manifold gasket. This is behind the valve pan, to the right of the power steering pump. Spray liberally as it evaporates quickly. Listen to the RPMs and see if there was any change up or down. If so , and these cars are known for this, it is a bad intake manifold gasket. $40 part 4 hour change. Also spray all vacuum lines that are visible If the RPMs do not change, it may be your AIC [air idle control], or TPS[ throttle positioning sensor.] These are located on the side of the throttle body. The throttle body can be removed by 2 10mm bolts. Unplug the 2 vacuum lines on the top of throttle body, and dis connect the throttle cable. Remove the throttle body being careful not to lose or damage the metal gasket , and with a torex 20 socket. remove the 2 bolts on the AIC [bottom sensor ] , and the TPS on the top. When you take out the AIC it will have a mushroom shaped cone. Clean that cone, and look inside the throttle body and clean all the surfaces that this sensor touches. Be careful not to lose the rubber O ring in there, and make sure it stays in place when you put it back on. .The TPS , just make sure its clean. NOW, on the back side of your throttle body will have a build up of carbon. Scrape as much as you can off. You then use varsol or brake cleaner, even wd40. . Clean throttle body with the AIC off so that you can clean thoroughly. Pay special attention to the 2 vacuum holes , and hold flap open and clean well. You should have a brand new looking part by the time it's done. Replace the opposite of removal. Be sure to put gasket back in properly. These cars are known for this. I own 2 of the same cars and things go wrong with the both of them exactly the same . If you spray the brake cleaner around the intake manifold gasket and it does change your RPMS, let me know and I can place my full video of the replacement I did last week. I decided to film it to help others and show how easy it was to do. Let me know how you make out. My own car hasn't worked this well in years. Please rate my solution thanks. keep me informed

Posted on Jan 07, 2013

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Idle air control valve is suppose to let the rpms go high to warm the motor to normal temp,and then drop it to 1200 rpms

Posted on Jan 07, 2013

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Posted on Jan 02, 2017

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SOURCE: 2000 SL-1 fast idle problem during cold weather only

You need to check and/or replace the thermostat and/or the temp. sensor. Take a meat thermometer and stick it in the overflow tank. The temp gauge on the dash should register above the 1/4 mark after at least 15 minutes of driving. If so, the meat thermometer should read above 180 degrees. If the meat thermometer reads 180 but the gauge isn't above 1/4, then you need to replace the sensor. If the meat thermometer doesn't read 180 or higher, then you need to replace the thermostat. The thermostat in these cars, though it doesn't fail on its own, has an unnecessary rubber gasket that fails, and allows coolant to leak past even when shut, causing the engine to not warm up thoroughly. IF the engine doesn't warm up, the idle won't come down--speaking from personal experience. I had to replace both items on my car. Now it idles fine, and after a bit of driving the gauge registers between 1/4 and 1/2, but always above 1/4. DO NOT tamper with idle adjustments unless you have exhausted all other possibilities. They are factory set, critical, and almost never need readjusting. Good luck.

Posted on Dec 10, 2008

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SOURCE: 02 sl1idles at 3000rpm when warmed up

BAD IDLE SPEED CONTROL. Good luck thanks for using FIX YA

Posted on Jan 12, 2009

  • 1 Answer

SOURCE: does anyone know a way

Hello Tricia,

The fix is unbelievably simple and NOT the ignition switch. It is however the pass lock white wire. The wire is located in the steering column. You can find a youtube video on it. You simply remove the airbag fuse (for safety), unscrew two screws under the steering wheel, you will see many wires. Find the wire wire (a guy has a complete instructional video on youtube), crank your Ion, cut the wire while it is cranked, seal the ends and replace everything. The only draw back is the passlock dashboard light will stay on. The passlock system is basically is someone steals your car without a key, it tells the computer to stop giving it gas. I had the same problem and since I cut the white wire it has cranked EVERY time. Good Luck, it will only cost you around 5 bucks...
Kelly

Posted on Nov 15, 2010

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1 Answer

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