Question about 1996 Chevrolet Impala SS

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Idle gon crazy

My 96 has an erratic idle for the forst start of the day... just recently it started and died out after it sat for about 5 hours, but started the next morning with the crzazy idle... and now the exhaust is blowing black... any assistance

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Ck for vacuum leaks if none found unplug mass air flow sensor and see if it runs better common problem on lt1 cars

Posted on Sep 26, 2008

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Posted on Jan 02, 2017

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My 2002 Buick park Ave. stalled sometime ago,, i have had the idle control, idle air, and maf, all replaced,, the car runs, now and then it feels like it stumbles,, it has stalled and restarted and ra


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I have a 99' bmw 323ic and my problem is it idles erratically and when it does it starts to lose power. Any Ideas?


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I have a 2004 Jeep Grand Cherokee Laredo 4x4 with the 4.0L. It has approximately 150k miles on it. I started the Jeep with 1/4 tank of fuel in it and it started rough and acted like it was going to die....


long post.
ill reduce it for you.
misfires. (is RPM below 700 then misfire can be normal) for idle speed controls dead.
ISC the isc controls speed, of idle,.
mine stuck like zillion times, in 400k miles. endless.sticking
mine was a tiny gutless stepper motor drive ISC valve.
the cone valve is side gets nasty and sticks (
(PCV gases caused as seen on all engines)
i clean it.
the proof is the easy press of right foot easy raises idle back to 700rpm and engine stops misfiring.
ever get a tuneup this decade or running spark parts 500,0000 miles
for the new world record.?


now the tricky part of ISC, , fully explained in the SM serv. man.
the PCM learns its behaviors.
it learns all hot start settings and cold
so when you key on, it goes to the correct HISTORICAL spot.
if it can move there(sticks) engine car race.
or run too slow,
cold start would be worse, as hot isc is more closed
so if sticks there closed, the next cold start will be horrid
some newer manuals telly you to add 5% throttle if car is hard starting this is so common.

clean it. end story.
ISC

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I have a 96 chevy c3500 6.7 turbo diesel runs fine on hwy but while driving in the city it tends to die most times will start right back up but some yimes it takes 5 or 10 min then t will start up then...


YOU COULD HAVE A RESTRICTED AIR FILTER OR FUEL LINE OR FILTER.YOU COULD HAVE DEFECTIVE FUEL SUPPLY PUMP OR DEFECTIVE INJECTION PUMP.YOUR IDLE SPEED TOO LOW OR FAST IDLE INOPERATIVE.

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Pt idle went crazy and car died now throwing codes


start by checking all the fuses inside the car and under hood

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