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1998 GMC 1500 Pickup Question: hard to start cold

 

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buff mcfagwell, 4.3L V6, Beverly Hills, CA, December 30, 2010, 14:21
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4.3 v6 hard to start when cold starts fine hot has missfire around 2300 &5000 rpm

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  • Answer #1

    December 30, 2010, 15:43
     Master

    Check the fuel pressure of your 1998 GMC 1500 Pickup. It should be 60-66psi with the pump running and the engine off.

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  • Answer #2

    December 30, 2010, 18:42
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     Enthusiast

    From previous experience there is a TSB (Technical Service Bullitin) that maybe the problem.It concerns the crankshaft sensor at times can cause ECM to set timing to 50 degrees advance causing starting problems.

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