USMCFieldMP

My 92 Topaz 2.3L idles in between 3000 and 4000 rpm. I've been told that it is either the Mass Air Flow sensor (which I just ordered off of eBay for $15), the Idle Air Temp sensor, or a Vacuum Leak.

I'm just curious as to whether or not there are any other things that I should possibly check/replace.

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USMCFieldMP

Bump...

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blackshewolf

I have the same Mercury Topaz '92 and I JUST replaced the air flow sencers. I can't remember which one it is but its one of the two. Whoever told you is exactly right on dot. Its very easy to access and replace - its right on top. Also check into the oxygen censor I just had to replace that and the motor mounts...lol. Honestly you and I are in for alot with our cars...I'm having the same difficulty I'am hoping to buy a Ford Taurus instead I wish you luck in your car.

jglen490

I had the same thing on my 94 Tempo 2.3 auto. It turned out to be a sticky idle air control valve. Also, for what it's worth to whoever else comes across this thread, the front tranny mount is bunged up because of high idle speed shifts.

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Mr3GTP

It wouldn't hurt to check the TV link from the throttle body to the trans; if it's 'bound up', it could cause the throttle to not move freely. Beyond that, check the idle speed control as posted above.

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'88 Tempo LX 5-speed, S/C'd & Intercooled 2.3 HSC.
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