Question about 1994 Chevrolet S-10 Blazer

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Why is my 1994 Chevy S10 Blazer lugging? motor shakes and lugs.

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  • Frenchzz1 Apr 15, 2009

    Bought my son a 95 blazer and idle is fine until it warms up. Any thoughts on what to look at.

    Thaks

  • Anonymous Mar 28, 2014

    when it raining my truck shakes and it backs down when shifting

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  • 17 Answers

Could be vacuum leak or bad ignition wire(s).

I had a similar problem on my "93 Ford probe. The engine idled pretty rough with shakes, Turned out to be a head gasket leaking engine coolant into the cylinder during low rpm's. At fast rpm's it was fine becuase the internal cylinder pressure was greater than the hot coolant pressure & would prevent the coolant from leaking in.

A friend has the same problem with his "94 Blazer 4.3 L, throttle body injection, manual tranny. He hasn't fixed it yet, It started a few weeks ago & is getting worse. His gets a fast idle with hiccups which causes the engine shake. He already checked the EGR valve. He also has a severe exhaust problem, Not oilly but very gray & terrible smelly, but only when the fast idle problem happens. THis fast idle hiccup problem starts when the engine is warmed up.

Posted on Nov 21, 2008

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