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Search Auto Parts Search 85 s10 2.8 2bbl Not gettin enough fuel to carb Sign up here!   Email This Post Auto Repair Home>> Truck Repair>> Truck Repair Advice mattcheck New User Aug 24, 2009, 10:03 PM Post #1 of 5 (6388 views) 85 s10 2.8 2bbl Not gettin enough fuel to carb Sign In I have a 1985 s10 p/u 2.8L 2bbl 2wheel drive 4 speed manual transmission. I am not getting enough fuel to the carb. Originally the problem was as soon as I get up to 30-35 mph the truck would bough out loose power but would not stall the lack power would last about 5 seconds and always happen at 30-35 nothing drive train related. So we replaced ignition module, rotor, distributor, plugs and the timing was correct. That did not fix problem so I replaced fuel pump and filter 2 sections of rubber hose problem still there we noticed a lot of fuel being pumped out of the return line that goes back to tank so we plugged up the return line at pump. Truck ran great so I went with that till it started spraying gas around the bolt we had in hose so I replaced fuel pump again we thought it was bad diaphragm on pumps. Replaced pump which is pump 3 on truck and it is still sending to much gas out return line can't idle unless I hold down accelerator about half way and that is real rough and sometime has white smoke but real faint all fluids are fine plenty of gas in it and fresh gas, The jets are clean on carb also. If you got any ideals on fixing problem please let me know and I thank you. Hammer Time Ultimate Carjunky / Moderator Aug 24, 2009, 11:47 PM Post #2 of 5 (6382 views) Re: 85 s10 2.8 2bbl Not gettin enough fuel to carb Sign In Was your fuel pump inside the tank or on the engine? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. mattcheck New User Aug 25, 2009, 7:04 AM Post #3 of 5 (6374 views) Re: 85 s10 2.8 2bbl Not gettin enough fuel to carb Sign In The fuel pump is on engine. The push rod for pump had no wear marks was in good shape. Hammer Time Ultimate Carjunky / Moderator Aug 25, 2009, 7:40 AM Post #4 of 5 (6371 views) Re: 85 s10 2.8 2bbl Not gettin enough fuel to carb Sign In OK, then you do have a carb. Your going to have to test the fuel pump pressure and volume. If you find it low, the check all the lines going back to the tank for a small leak. Replace any rubber lines. If the pressure checks out good, then check the fuel filter and carb. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. Tom Greenleaf Ultimate Carjunky / Moderator Sep 1, 2009, 2:54 AM Post #5 of 5 (6359 views) Re: 85 s10 2.8 2bbl Not gettin enough fuel to carb Sign In As Hammer said - test the pump! Just plain toss the dinky fuel filter it has a few times a year if needed. More: These things rusted while you watched around here anyway! If fuel lines are sucking air that's all you'll get and they can rust bad! Could be sucking air right at the connection at tank too! Comment/opinion: This last of the carbs were a nightmare and that one in particular! Owned one (same just 1984) and spent hours getting it right! T   Email This Post   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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