Re: 87 GMC Sierra R3500 7.4L TBI vacuum diagram
Quote:
Originally Posted by DieselSJ
Cap it.
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Done, I also connected the AC line as you mentioned (����),
I’ve replaced all vacuum hoses with new silicone hoses, old ones are brittles,
Thanks to you ��
If the truck runs rich, how do I tune the TBI?
This a video that I made on YouTube on how this truck,
https://youtu.be/WHcGnic6_Yo
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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
Last edited by Captain J; 10-17-2019 at 05:03 AM.
Reason: Add more texts
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