Need Help! Suburban vacuum problem
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Need Help! Suburban vacuum problem
Hi guys.
I have a 1989 Chevy Suburban 5.7L 350 V20 4x4 TBI and I was hoping that someone might be able to tell me about the vac ports on the throttle body. My vac diagram sticker is nowhere to be found and I have a dilemma as to what ports should be open and used. There are four letters for four ports... J, C, A and S. o.k. My throttle body has ports C, A and S open with C for the PCV, A for the evap canister and S for the EGR. I haven't been able to find this setup except on some newer model 7.4L engines. The diagrams in the book for my year/model engine show ports J,A,C open and used.
Does anyone have any info?
I appreciate any help.
Thanx a million, Jay
I have a 1989 Chevy Suburban 5.7L 350 V20 4x4 TBI and I was hoping that someone might be able to tell me about the vac ports on the throttle body. My vac diagram sticker is nowhere to be found and I have a dilemma as to what ports should be open and used. There are four letters for four ports... J, C, A and S. o.k. My throttle body has ports C, A and S open with C for the PCV, A for the evap canister and S for the EGR. I haven't been able to find this setup except on some newer model 7.4L engines. The diagrams in the book for my year/model engine show ports J,A,C open and used.
Does anyone have any info?
I appreciate any help.
Thanx a million, Jay
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