Question about 1998 GMC Sierra

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I have 1998 sierra 1500 vortec 5.0 liters,when engine is cold (below 35 degre f )engine turn but don t start,i have fire,fuel pump run and i have pressure on my main fuel line juste before injector pack but dont inject fuel,if i plug block heater engine can start when is warm,and last time i start engine is missing and smell gasoline at exhaust pipe and very low power and i run the truck for 1 mile and the catalaser come overheat(red),i have two code when engine running(p1345 and other is missfiring )i change crank sensor ,plug,wiring,distributor cap and rotor,and my problem stay here.

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Camshaft To Crankshaft Position Correlation Fault is what p1345 means. if the problem isnt electrical I would imagine the timing chain could be stretched and the engine is out of time somehow

Posted on Nov 18, 2009

  • jz auto Nov 19, 2009

    just thinking about it a little more the truck may need to have the ignition module replaced part #MPE TP58SB $131 from napa. good luck

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