1993 GMC C1500 ignition timing

1993 GMC C1500
20,300 MILES • V8 • 4WD • AUTOMATIC
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KATMANDU_1
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  • 3 POSTS
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
Jun 4, 2010 at 11:14 AM
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JACOBANDNICKOLAS
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  • 110,175 POSTS
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?
Jun 5, 2010 at 6:49 PM