Question about 2001 Chevrolet Blazer

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Flashing check engine light on a 2001 chevy blazer ls 4.3 v-6. Rough acceleration. Low idle: 750 rpm. Any ideas?

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  • Chevrolet Master
  • 34,541 Answers

Yes first thing is get it scanned for codes set

Posted on Sep 25, 2018

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5 Suggested Answers

Anonymous

  • 178 Answers

SOURCE: rough idle stalls at low rpm's

hello first check your idle with the car running foot on brake see were your rpm reading is if your below 500rpm check your label underhood for your curb idle setting second see if theres a adjustment screw you can increase were your gas cable lever rest against your set screw underhood if you feel confident enough remove your iac motor idle air control valve if the bore were the end of the pintle extracts out to close has varnish builup our carbon it will stick creating vacuum leak type senario causing stalling rough idle sometimes even no start conditions good luck

Posted on Sep 18, 2008

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Anonymous

  • 12 Answers

SOURCE: rough idle / engine surges until power is applied

Sounds like a possible vaccume hose leak?

Posted on Feb 07, 2009

Anonymous

  • 1 Answer

SOURCE: rough idle stalls at low rpm's

check your transmission fluid,the motor will stall when fluid is low

Posted on Mar 24, 2009

countrysi248

Jerry Koski

  • 443 Answers

SOURCE: rough idle, backfire on acceleration

check everything you can under the hood your air intake system all of it especially make sure all clamps are tight .. and make sure all vacuum hoses are good and not cracking or broken or just loose . you might run a little fuel cleaner through a tank of gas too cleaning the engine fuel system up some. just a few ideas.. Jerry

Posted on Apr 12, 2009

Anonymous

  • 4 Answers

SOURCE: 1992 pontiac grand am no acceleration, a rough idle (engine miss)

Does it have the 2.3l Quad 4 engine? If so replace the plastic piece that the coils go into, they go bad and leak spark to the cam towers and then you get a nice one or multiple cylinder misfire.

Posted on Apr 30, 2010

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Flashing service engine lights are very bad, means there is a problem that can potential cause harm to the engine. Sounds like you may have a bad coil. Take it to a place like Autozone which can check the check engine light. They'll give you a print out that will give you a better idea on what's going on. If it's a misfire on a cylinder or two, check plugs and coil, also could be an injector.

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1992 chevy blazer idols too low when engine is cold it idols around 800 rpm but when it warms up it drops down to around 400 rpm n alittle lower when i put it in gear


The problem is in the idle air control motor. It is mounted on the throttle body with two bolts, you can pull it off and make sure it is not caked with carbon also check where it mounts on the throttle body and make sure it is not caked with carbon.

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The sensor on the bellhousing is a crank position sensor...rpm is read from the ignition coil. It sounds like you have gone everywhere I would have gone, but, what if the flashing lights are the result of low charge rate from low idle (not the other way around)? Then you would be looking at an idle air control valve or something causing low idle condition.If the passageway is clogged up it could be lowering the idle speed. When it rains the air density changes, but It dosen't make a lot of sense. Map sensor is pressure sensitive but usually causes rough running if failed, manifold temp sensor could have something to do with it, but I've never seen one do that.
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