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06-08-2014, 11:15 PM | #1 |
Registered User
Join Date: Jan 2012
Location: Lanoka Harbor NJ
Posts: 6
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350 swap fuel problems
hey guys i did a engine swap in my 1980 c10 from a 267 stock carb to a 350 with brand new cylinder heads, pushrods, cam, fuel pump , quick fuel carb, the super stock works lol and im having a problem getting fuel period.
in all seriousness it ran with a high flow 80gph summit fuel pump for about a month then started to act funny.i wanted to be cool and i got on it one day with my friend in the truck, and it backfired when i came down on the gas? also when i slowed down it wanted to stalled out, almost choking, so i shut it off. i had a hard time getting it started again but it started. . a week later in the morning drive to work it started to stall, seeming like lack of fuel, so i adjusted the floats in the carb bc in the fuel window there wasnt gas, but in the secondary there was(750 duel feed carb). ran for a few weeks and just wouldnt start one day, again, lack of fuel. i got it started with a fuel regulator attached after the pump and in between the carb. ran for 4 days and pulled the same ****. mind you basically brand new motor, almost 400 hp, big carb with no vacuum lines hooked up to carb?, but the tank needs a vacuum line to the canister? i blocked those up. i was told to by this guy i work with who has race cars and works on them. he knows about racing but what about kinda stock and the situation with the vacuum and the gas tank? finally i get mad and my friend put in smaller jets and seats for the floats in my carb and she still wont start. i changed my fuel pump to a stock one and the sending unit in the tank and blew out the metal line with a air compressor and no go. i checked for leaks or cracks in the rubber lines and there are none. im really not sure whats up. the new pump is on the pushrod, nothing is leaking. new **** everywhere and i cant get it started lol i can put alittle gas in the carb and get it started but it wont stay running bc of lack of fuel any and all suggestions pastestampthere 1980 c10 2wd short bed 89 camero 350 block stock crank and rods, flattop pistons 2.02 195 intake runner summit heads tapered valves summit towing cam manley double roller timing chain manley 400 thousand over stock pushrods comp die cast roller rockers weiand aluminum intake quick fuel slayer 750cfm duel feed vacuum secondary msd igniton box with stock distributor, accel high volt coil hooker headers, flowmaster 2.5 straight back stock fuel pump |
06-08-2014, 11:38 PM | #2 |
Registered User
Join Date: Mar 2013
Location: Fayetteville Arkansas
Posts: 830
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Re: 350 swap fuel problems
Crack the line when you crank it and see if there is any pressure, or put a pressure gauge in the line.
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Scott 87 Chevy 2WD SWB, 88 4x4 LWB http://67-72chevytrucks.com/vboard/s...d.php?t=610652 |
06-09-2014, 12:09 AM | #3 |
Registered User
Join Date: Apr 2014
Location: calgary alberta
Posts: 1,248
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Re: 350 swap fuel problems
ya sounds like crack maybe at the tank or fuel having to up hill before the pump is the tank new or old and the what about the sending unit new or old
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06-09-2014, 12:12 AM | #4 |
Registered User
Join Date: Apr 2014
Location: calgary alberta
Posts: 1,248
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Re: 350 swap fuel problems
and if you have a carb 80gpm is way too much you only need 6gpm for a carb you
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1980, 350 swap, fuel, fuel tank, no gas |
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