Timing problems - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Rons86 · 02-19-2009, 11:32 AM

A little history on my truck, 86 c10 with reman. stock 350 (about 6k miles), 400 trans, eledbrock performer intake and 1406 carb, stock hei distributor.

I have a problem after replacing the coil, pick-up coil, module, cap mechanical advance weithgs and springs (used the medium springs) and rotor, when i set timing with vacuum advance plugged it runs great. When I hook the vacuum advance up again (either on the timed vacuum port on the manifold vacuum port) it runs terrible and has a very bad hesitation just off idle. Was wanting to get your opinions. I think the vacuum advance is bad, but not sure.

02-19-2009, 11:32 AM	#1
Rons86 Registered User Join Date: Sep 2008 Location: Holt, Missouri Posts: 94	Timing problems A little history on my truck, 86 c10 with reman. stock 350 (about 6k miles), 400 trans, eledbrock performer intake and 1406 carb, stock hei distributor. I have a problem after replacing the coil, pick-up coil, module, cap mechanical advance weithgs and springs (used the medium springs) and rotor, when i set timing with vacuum advance plugged it runs great. When I hook the vacuum advance up again (either on the timed vacuum port on the manifold vacuum port) it runs terrible and has a very bad hesitation just off idle. Was wanting to get your opinions. I think the vacuum advance is bad, but not sure.



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