Mechanics

IGNITION TIMING

1993 GMC C1500

1993 GMC C1500 V8 Four Wheel Drive Automatic 203, 00 miles

had to pull the intake manifold to fix water inlet. Did not mark distributor. When putting back I set #i cylander up on comp stroke and mark appears tdc on pully and put distibutor pointing towards #1 tower. Fianlly got it to fire but and run, barely runs, I move distributor but gets no better, rough, someone said I need to unhook wire and set timing then plug back in, computer? What and where is wire. I might be a tooth off but cant move oil pump? I need help, tim ing light is broke but should be able to get to run by ear to get to town to set a garage
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Katmandu_1
June 4, 2010.




I'm not sure what wire they are refering to. However, when you put the distributor in @ TDC, it will be slightly ahead of #1 on the cap. Based on everything you mentioned, it sounds like you are a tooth off.

Just to confirm, turning the distributor makes no change?



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