Question about 1999 Chevrolet Blazer

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1999 S10 Blazer 2WD 4.3L V6. Starts hard, idles rough.

1999 S10 Blazer 2WD 4.3L V6. Car starts hard then idles rough. Some black smoke from exhaust. At speed the car runs fine though it may run rough at a traffic light. The air filter is clean. I removed the air induction tube from the throttle body to get a look inside. I opened the throttle plate and noticed that it was wet on the back side. To my way of thinking this indicates an abundance of fuel at low engine speed. I don't know how this fuel injection system works other than it is the throttle-body type. Any suggestions besides shoving it over a cliff, which would be difficult here as it's quite flat?

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  • redneckoutla Apr 08, 2009

    I have the same problem with mine so I replaced the CPI unit along with both the inlet and return lines under the plunem then did a tune up finally got it out to try it today and it was doing great then It started getting real ruff and gutless again and a real bad fuel smell any suggestions.

  • Anonymous Mar 13, 2014

    drawing to much vacume through throttle body. it runs rough, and dies when throttle body cover is taken off.

  • Anonymous Mar 25, 2014

    s10 blazer 2.8 v6

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  • Master
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You have a single injector under the intake plenum it has 6 branching fuel leads off of this.A very common problem is the regulator attached to this and it leak off fuel which falls into the intake .causing this problem. it needs to be replaced .i have done at least 80 of these in my career.this will fix your problem.thanks for choosing fix ya

Posted on Mar 04, 2009

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  • Contributor
  • 28 Answers

Lol just clean the intake with a tooth bruch and some INTAKE KLEEN but its more like a vacume leak or a tune up wires, plugs, cap, rotor

Posted on Mar 04, 2009

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motor1258
  • 6674 Answers

SOURCE: Hard start, rough idle, some black smoke, engine service light on

A scan for trouble codes may point you in the right direction quickly, rather than hit & miss, with replacing parts. Some of the autoparts stores will scan for free, and your right where you need to be to get the right part at the same time.

Posted on Mar 04, 2009

6ya6ya
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Posted on Jan 02, 2017

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2 Answers

I have a 1993 chevy s-10 blazer 2wd with a 4.3. vortec and it sometimes idles rough and when it does black smoke comes out of th exhaust i have changed the plugs wires rotor button and distirbutor cap and...


two things pop to mind with this truck, first these motors are notorious for having bad intake gaskets take a flashlight and look very carefully around the valley of your intake/block-head seal you'll possibly see either antifreeze leaking or a weird looking whitish or greenish sort of foam you can also use propane around the seal and look for obvious idle changes, I have done tons of these intakes in my shop, the other two things I would suspect if that looks fine are 02 sensors, or maf sensor.

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NISSAN CEDRIC 2001, ENGIN STOPS WHEN PRESS BRAKE PEDDEL


There are few possibilities that can cause such problem.
I recommend you few help links related to your problem.Click the link below and follow the troubleshooting;-----Idles rough and quits when gas pedal is pressed less? http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html-----------
Brake pedal stuck? http://howtobyme.blogspot.in/2012/03/brake-pedal-stuck.html

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Car only starts when gas pedal is pressed? http://technoanswers.blogspot.com/2012/01/car-only-starts-when-gas-pedal-is.html

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Car won't start without hitting the gas pedal? http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-without-hitting-gas.html

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emits whitish bluish smoke and bad fuel smell from exhaust

http://schematicsdiagram.blogspot.com/2011/12/van-emits-whitish-bluish-smoke-and-bad.html

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White smoke and Acrid Smell? http://whoisbyme.blogspot.in/2012/07/white-smoke-and-acrid-smell.html
---------- Car stalls and throws white smoke from exhaust? http://repairhelpcenter.blogspot.com/2012/01/car-stalls-and-throws-white-smoke-from.html

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This will help.
Thanks.

Jul 20, 2012 | Cars & Trucks

1 Answer

Hard to start then black smoke out exhaust rough idle


Check the fuel pressure regulator. It may be bad. Pull off the vacuum hose to it and check for any sign of gas in the hose. A busted diaphragm in the regulator could let extra gas into the intake through the vacuum hose. The black smoke indicates it is getting too much gas-running rich.

Jun 12, 2012 | Cars & Trucks

1 Answer

Black smoke from exhaust, rough idle, black soot on plugs


signs of a bad fuel pressure regulator-- the vehicle will run rough, the engine will not start ( usually in the mornings,) many times engine starts but stalls shortly after starting. a bad regulator can result in fouled plugs. replacement is only cure. 1- black soot on plugs-2-black smoke from tailpipe-3- running rough-4- stalling, good-day! repost if need be.

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I have a 1998 Chevy s10 blazer that is running ruff and shaking and bad smell from exhaust like sulfur.When I step on gas black smoke comes out of exhaust.There are no codes when hooked to code...


Check the spark, it should be blue, if it is yellow than you need to check your ignition system, coil,spark plugs, spark plug wires, dist cap, rotor ect.
Black coming out the exhaust is unburned fuel, when you have the spark plugs out do a compression test.

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2 Answers

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It sounds like you have a blown head gasket, or maybe both head gaskets....it has all the symptoms of such.....

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Exhaust blows black on ford explorer


look for a vacume leak. black smoke means it is running very rich

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1 Answer

Hard start, rough idle, some black smoke, engine service light on


A scan for trouble codes may point you in the right direction quickly, rather than hit & miss, with replacing parts. Some of the autoparts stores will scan for free, and your right where you need to be to get the right part at the same time.

Mar 04, 2009 | 1999 Chevrolet Blazer

3 Answers

91 chevy s10 blazer.


have you checked the fuel pump? mine would shake rough then stall... i doubt it is the tune up but check the fuel stuff

Nov 22, 2008 | 1991 Chevrolet S-10 Blazer

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