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Captain J · 10-15-2019, 07:07 AM

Excellent, thank you very much
The AIR system is removed,
there is a 2ed PCV on the second valve cover do you know where the hose go to?
Additionally there is a valve behind the TBI (F port) from the manifold sticking out with its port capped, do you know where if it should be capped or what

10-15-2019, 07:07 AM	#5
Captain J Registered User Join Date: Nov 2017 Location: H, Q Posts: 180	Re: 87 GMC Sierra R3500 7.4L TBI vacuum diagram Excellent, thank you very much The AIR system is removed, there is a 2ed PCV on the second valve cover do you know where the hose go to? Additionally there is a valve behind the TBI (F port) from the manifold sticking out with its port capped, do you know where if it should be capped or what __________________ 1972 GMC Sierra C2500, V8-350 1986 GMC Sierra C2500, V8-454 1986 GMC Sierra C2500, V8-LS1 1986 GMC Sierra K2500, V8-350 1987 GMC Sierra R3500, V8-454 1997 GMC Sierra K2500, V8-454