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95 Chevy Blazer 4.3 white smoke at idle

I just replaced the fuel injector spider pump under the plenum,but i still have lots of white smoke on cold starts and then it runs out no smoke but will smoke bad at idle,the check engine light comes on and off but no codes,thanks for any assistance,this smoked like this before i replaced the injectors,i was having a stsrt problem and low fuel mileage and the injectors cured that,but still have the access smoke at idle,thanks again

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  • carlsurratt Jan 12, 2009

    thanks for the info,i am not losing any anti freeze but it does have a cylinder that misses bad when it is smoking,i think you may have a thought that the fuel portion of the intake may have a leaky gasket,i guess i will take manifold off and then the head,thanks again,

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My 1988 chevy blazer 4x4 smokes on cold starts till it warms up then it goes away what is causing it

Posted on Mar 10, 2009

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Are you losing antifreeze? white smoke is usually a sign that antifreeze is getting into the cylinders and the result is the white smoke from the tailpipe. if you do a compression test and inspect the spark plugs for wetness you will find the cylinder that is leaking (you will have to replace the head gasket on the side if the engine if you find antifreeze in the cylinders) some times with blown head gaskets you will notice a lot of pressure in the radiator as well as air bubbles coming out of the radiator (caused by the compression coming from the cylinder through the cooling system and escaping through the radiator overflow or fill cap if you have it removed)
if there is any coolant galleries (water jackets) around the fuel plentum you may be getting the antifreeze into the intake/cylinders that way as well
hope this helps.....and keep me posted with comments here and ill be glad to assist you further.......thanks s60six!

Posted on Jan 11, 2009

  • s60six Jan 13, 2009

    no problem! keep me posted on your progress with a comment or two here in this post or if you need and advice or assistance as well.
    Good Luck!!!



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