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Old 03-18-2008, 08:32 AM
marek12886 marek12886 is offline
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High Rev on idle

Hey guys,

I just bought a 97 Saturn SW1 as a secondary car to drive to work. When I bought the car it would usually rev up to 3000 everytime I would get out of a gear. It also had trouble starting from cold. But when it finally started it would idle at 2500-3000 for maybe 5 seconds before it dropped down to the normal 1200 (i forgot the exact number) rpm. Also, once I started driving it in the morning it would die on me a couple times when I pressed the accelerator. Then it drove just fine.

So here is the deal. The genius I am I thought that I could make it better, and of course it backfired on me.

I took out the throttle body and found a carbon deposit of about 1/4 inch on the back of the valve! I was excited that I found the reason for all those problems but after I cleaned it and put it back in, my rpm tried to shoot through the roof when I started the car. I checked all the connections to the sensors and everything seemed fine. So I tried it again and once again the rev just go up without any intentions to stop. I've also noticed a lot of smoke coming from the exhaust, which it didn't do before.

I started the car again and noticed that it is bouncing of 4500 rpm and hitting it like a limit bounding back to 4400 and then going back 4500. it completely freaks me out becuase it seems like that thing is about to blow up.

I was wondering why there is so much air going into it to let it rev that high, so i disconnected the cable to the throttle body to make sure the valve stay close but i didn't have the slightest effect.

What could be the reason for this?

Also, to my dismay, I see a few wires that seem to come from our regular Wal-Mart electroncs section, taped into the factory wire harness in several places under the hood.

Could it be the idle controller? Does it have one?

Any help is greatly appreciated!!!
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