Question about 1999 Chevrolet Malibu

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2000 Blazer 4.3/ idle control, high idle 950 rpm, spec 625 rpm.

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Idle air control valve or a vacuum line has a bad leak of sorts

Posted on Oct 08, 2009

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1 Answer

High idle 2000 blazer


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Sep 29, 2012 | Cars & Trucks

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Runs very rough and idles at 950 rpm, is this fast?


Sounds like a vacuum hose leak. Look under the hood for any cracked vacuum hoses and replace. listen for hissing noise.

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What is the timing specs for a 1968 ford thunderbird


The timing specifications for that vehicle with all V-8 engines 302, 390, 428, 429 are the same.

Spark Plug Type: BF32

Spark Plug Gap: .034 In. - .035 In.

Ignition Point Dwell Angle: 27 Degrees

Ignition Point Gap: .021 In.

Ignition Timing: 6 Degrees Before Top Dead Center

Engine Compression: 150 Psi.

Engine Idle Speed:

302-390-428 Engines: 625 Rpm M/T or 550 Rpm A/T

390 GT Engine: 700 Rpm M/T or 550 Rpm A/T

429 Engine: 550 Rpm M/T or A/T



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Oct 16, 2010 | Ford Thunderbird Cars & Trucks

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I have a 2000 chevy silverado, i am looking for curb idle and tune up specs , it seems that the idle is low when parked, 500+ -- and when done running around it may be as high as 950 rpm, when i turn it oo...


T here are no adjustments they are computer controlled, you can not adjust them, what you need to do is check the idle air control valve it sounds like its bad and not working this is common, when start the truck it should idle up and slowly drop to idle replace that valve.heres a picture of it.its located on intake on throtlebody. hope this helps.also idle spec is 650rpm at idle.f3cecb3.jpg

Feb 11, 2010 | 2000 Chevrolet Silverado 1500

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2005 jetta tdi high idle


If a/c, headlights,.. other stuff is on 950 is about right.

Jun 19, 2009 | 2005 Volkswagen Jetta

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High idle in park and nutreal


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May 02, 2009 | 1999 Isuzu Amigo

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S10 has very high idle when cold and sticks to the gas when warm


you need to replace the throtle body controll sensor. Also you may want to make sure all your linkage from the pedal to the throtle body is cleaned and lubed correctly. While playing in this direct area. Your throtle body is only 4 bolts away. Why not get some carb cleaner and get to know your truck just a litle more.

If this is a carborator, then you need to turn my warmup idle down. there are 2 sets of idles on carborators. the one to warm up the engine, automatic choke or pin settings. Get a Chilton, find out which idles pin is for what. and play a litle bit.

I think you have a throtle body so I would also check the automatic air intake sensor. It could be going bad. Check your filter and make sure its clean.

hope all this helps.

tepfy

Feb 27, 2009 | 1992 Chevrolet S-10 Blazer

1 Answer

Not reving high on cold start


Here is the most common cause of surges and stalls and low idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake

Feb 06, 2009 | 1998 Volkswagen Jetta

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High Idle speed on 1989 Merc Sable, 3.0L V-6. Approx 2000 RPM


My wife had a 93 ford tempo 4 cylinder with same problem.It turned out to be the idle air solenoid mounted on the air intake manifold.

Jan 17, 2009 | 1989 Mercury Sable

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