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?
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
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
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.
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
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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.
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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.
drawing to much vacume through throttle body. it runs rough, and dies when throttle body cover is taken off.
s10 blazer 2.8 v6
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