Question about 1995 Chevrolet Blazer

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Service Engine Soon Light and Rough Idle (Below 1200 rpms)

My 1995 Chevrolet Blazer 4.3 Vortec has had this problem for the past couple of months. I have replaced the fuel pump, fuel filter, spider fuel injection system (CMFI), rotor button, distributor cap, wires, plugs, PCV vent, checked for vacuum leaks, checked for upper intake manifold leak, installed internal fuel lines, replaced the MAP sensors, and the problem still exists.

Can someone please help??

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  • Anonymous Feb 12, 2009

    all the same problems

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  • 599 Answers

Do you get check engine codes?..have you done a leak down test and compression test to determine mechanical engine health?

Posted on Oct 07, 2008

  • Steven C Wilson
    Steven C Wilson Jan 19, 2014

    I have the same problem and we are getting engine codes. The codes indicated problems with the Map sensor, TPS or EGR sensor.

  • Steven C Wilson
    Steven C Wilson Jan 19, 2014

    We have done a compression test and it checked out fine. I am not sure what a 'leak down test' is.

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