Anyone had this problem before??


Old 12-30-03, 01:51 AM
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Anyone had this problem before??

I have a 1987 Chevy S10 Tahoe And the Idle is too fast.

The truck runs good in every respect other than that.

It has a 2.8 V6 with auto transmission, PB,PS,AC.

When the engine is first started It idles fast and then slows slightly but not enough to keep it from lurching pretty hard when put in gear.

It has a throttle body injected carb and I cant seem to find an idle screw.

Do these have a fast idle modual that can go bad or something?

All help appreciated.Thanks in advance.

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Old 12-30-03, 02:37 AM
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The idle is computer controlled and not adjustable. You need to check for vacuum leaks and also scan computer and check temp sensors.
Old 12-30-03, 04:23 AM
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Thanks Desi501.
Old 12-30-03, 04:27 AM
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Check the gasket under the tbi unit very common to find them leaking.I spray carb cleaner at suspected leak sources with the engine idleing,if the rpms change you've found the leak.Don't spray near the exhaust manifold or plug wires because it's flammable.
Old 12-30-03, 05:03 AM
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Thanks davo.
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