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Hi I have a 97 gmc 1/2 ton 5.7 l. It has trouble starting when it is hot. I have changed the starter and battery and alternator. It cranks over slow when it is hot and sometimes it cranks over for awhile before starting. Where do I start looking?


   
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Location: Oregon
sounds like you might have more than just one problem. for the slow cranking hot, you might want to vetify your ignition timing and see what the battery draw in amps is when it acting up.

the long cranking, you should check your fuel pressure and/or for a leak in the fuel system. also make sure the coolant temp is accurate


   
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