Question about 2001 Chevrolet Blazer

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Idle rpm on 2001 blazer 4.3 eng 4x4 - 2001 Chevrolet Blazer

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: setting idle on 2001 blazer

there is no manual setting for idle speed it is computer controlled the only thing you can do is make sure the thottle bore is clean.good luck from schleck.

Posted on Sep 03, 2008

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SOURCE: 1999 chev blazer 4x4 system

When you say that the 4wd won't engage, I assume you mean that the front differential is not locking in. If memory serves me correct there is a 3 port vacuum switch located on the top of the transfer case that gave a lot of problems. When the transfer case is shifted to a 4wd mode (high or low) this vacuum switch changes position and routes engine vacuum to the actuator located under the battery tray. This actuator then pulls a cable that move a fork inside the front differential that locks the front diff in 4wd. The vac switch gave a lot of trouble, but any broken vac hoses or differential internal mechanical issues could present as the same issue.

Posted on Nov 23, 2008

  • 14 Answers

SOURCE: s-10 blazer 4x4 idles fast

idle control valve

Posted on Mar 06, 2009

The GQ
  • 32 Answers

SOURCE: 2000 Blazer 4.3/ idle control, high idle 950 rpm,

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

Posted on Oct 08, 2009

  • 5 Answers

SOURCE: intermittent fuel starvation,high rpm at idle restart eng all ok

You should verify you have proper fuel pressure. Check with a gauge when cold and hot. Possible clogged fuel filter is not allowing enough gas to feed engine. Verify pressure at idle and also under load when driving.

Posted on Dec 06, 2009

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96 4x4 Blazer runs rough when you first start going ,when you give it the gas it's having a hard time ,but smooths out ?only low RPM


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I have a 2001 blazer 4.3 4x4 why does it miss at low rpm and run fine at higher rpn changed wires cap &button still does it


Stop by any good parts store and have them do an OBII scan (fault scan). Most will do this free. I suspect MAF (Mass Air Flow sensor) but have them do the scan vs throwing parts at it. Also run a good fuel system cleaner through it, there's ALOT of questionable fuel going around & avoid cheap gas.

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Intermittent fuel starvation,high rpm at idle restart eng all ok


You should verify you have proper fuel pressure. Check with a gauge when cold and hot. Possible clogged fuel filter is not allowing enough gas to feed engine. Verify pressure at idle and also under load when driving.

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95 s-10 blazer idles rough


CHECK FOR A LEAKING INTAKE MANIFOLD GASKET, USE A CAN OF CARB SPRAY AND SPRAY AROUND THE TOP OF THE ENGINE, IF U HIT ON A LEAK U WILL HEAR THE ENG CHANGE TONE AND IDLE RPM.

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Setting idle on 2001 blazer


there is no manual setting for idle speed it is computer controlled the only thing you can do is make sure the thottle bore is clean.good luck from schleck.

Sep 03, 2008 | 2001 Chevrolet Blazer

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