Question about 1987 Chevrolet R20

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My truck today i when outside to start my truck it rn smooth until it heated up and then started idling bad and sputtering ive replaced the iac the tps and map sensor and the egr valve but theres a egr solnod replaced tbi gaskets and i can smell gas like its burning lean i replaced the fuel pump and regulator and i sprayed soapy water around the intake and no bubbles what could it be i need help and i see bubbles in my radiator now and then but there no water in my oil or comin out the tail pipe can someone help me out

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You have eather a really slow head gasket leak or a crack between cylanders

Posted on May 25, 2009

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