Question about 1994 Chevrolet S-10 Blazer

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Misfires, runs rough, black smoke-90 blazer

Blazer sat for a year (through a winter) because of tranny issues(would't shift out of first). Put a fresh battery in it and it started right up. Soon as I tried to move it it began running rough and misfiring spewing black smoke all the while. Put a little fresh gas in itand a gas treatment. Was able to get it started (had to keep it to the floor for a few moments) again but still rough and smoky and died a couple of times while trying to get it back off of the street. Want to get it running smooth again before I tackle the tranny..any idea where to start.

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  • 129 Answers

If it's carburated, make sure your butterflies are opening.

Posted on Apr 27, 2017

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Posted on Jan 02, 2017

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SOURCE: 93 5.7 blazer, flooding, getting too much gas

you need to replace the fuel pressure regualtor underneath the plenum , ck fuel pressure if it drops suddenly after you shut the engine down suspect fuel regualtor , use to have to replace the whole spider assembly now i think you can just replace the regulator

Posted on Dec 17, 2008

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SOURCE: engine runs terrible

Fuel line or fuel pressure regulator leaking, both are inside intake.

Posted on Jan 01, 2009

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SOURCE: Blazer rumbling,choking,missing in engine

Check the fuel pressure regulator. generally "failure" position is full open which will richen up the fuel mixture. also check vacuum line to the regulator for cracks and good connection.

Posted on Jun 06, 2009

robshow
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SOURCE: 2001 S-10 with the 4.3 Vortec engine keeps dieing

Most likely the battery and possibly the alternator are bad.

Posted on Sep 23, 2009

csmock132
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SOURCE: 1987 Chevy Blazer Vortec 4.3 engine.

What is the 8th digit of the vin?

Posted on Jun 06, 2010

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