Im looking for a fuel system diagram for my 1985 Chevy C10 to figure out how to run a 2nd return line to my tanks. Can I just "T" off at the OEM fuel pump back to the original return line?

Asked by Aug 03, 2015 at 10:18 PM about the 1985 Chevrolet C/K 10 Standard Cab SB

Question type: Maintenance & Repair

I just bought a new Crate 350 LB 5.7L engine. Went from a stock 305 and now its pretty
much all custom. I have a OEM mech fuel pump, but new edelbrock carb wants less than
6psi than the 10psi that the mech fuel pump is pushing. I have a Holley fuel press reg but
I want to "T" off back to the fuel pump return line. Is it possible? Plus I can't locate ANY
diagrams for the fuel system anywhere, including the Haynes book.

Any ideas?   Thanks

5 Answers


yes.. higher dollar systems use the return line...i still dont. and if you click on my pictuct you will see a fuel line into my regulator feedind a dominator and 2 stages of nitrous...i dont run a return because tme fuel in my line is not in there long enough to get hot..also..a return will keep a pump cooler and a little bot quieter..but anything stock or a little bigger is a you have a fuel cell..cause you really dont want a return..put a $20.00 fuel pressure gage oi/in the holly reg.and set it at 5lbs at 4000 rpm ..want to add anoyher return line in to the tank do you... dead head it at the holly reg with one line in bottom one outlet pluged and other outlet to carb...a return system with a big pump/volume only returns the fuel to the tank to keep it a little colder

1 of 1 people found this helpful.

i rushed thru that >


let me find what you need.>ill look


omit the red!


here do 2a > fuel_pump_wiring_diagram_110_140_0003.pdf

2 of 2 people found this helpful.

Your Answer

Add photo

Related Questions

C/K 10

Looking for a Used C/K 10 in your area?

CarGurus has 281 nationwide C/K 10 listings and the tools to find you a great deal.


Search Chevrolet C/K 10 Questions

Chevrolet C/K 10 Experts

#1 CaptPKelly
Reputation 680
#2 Rowefast
Reputation 370
#3 F_O_R
Reputation 360
View All

Related Models For Sale

Used Ford F-150
2,138 Great Deals out of 195,050 listings starting at $290
Used Chevrolet Camaro
348 Great Deals out of 31,304 listings starting at $2,500
Used Ford F-100
156 listings
Used Chevrolet S-10
8 Great Deals out of 1,314 listings starting at $1,999
Used Chevrolet Corvette
197 Great Deals out of 21,998 listings starting at $2,500
Used Ford Mustang
687 Great Deals out of 44,975 listings starting at $750
Used GMC C/K 10
11 listings
Used Chevrolet Blazer
1,172 listings starting at $1,495

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.