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#1 |
Registered User
Join Date: Mar 2013
Location: Shelby, NC
Posts: 8
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Won't crank after installing new fuel sending unit.
Okay guys, I finally got the correct fuel sending unit for my truck and popped it in. Key on, 1/2 a tank, yeah it works. Then I proceeded to change the tranny fluid, new pan, gasket, and dipstick to fix the really bad leak I had. Filled it to just below the add mark and went to crank it up to start getting the level right. Truck fired up momentarily and cut off. Now it won't crank at all. First of all, I am carburetor stupid! Any help on what to check would be appreciated. Truck has a 350 with the original Rochester quadrajet.
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#2 |
Registered User
Join Date: Mar 2013
Location: Grand Island, Ne.
Posts: 1,110
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Re: Won't crank after installing new fuel sending unit.
Good old Quadraflood. Give it a bit and try it again. possibly just flooded it, My truck has been doing the samething but I need a carb rebuild and new fuel tank... Dont get discouraged, Lots a good peeps here that will help out.
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J. Vess, 6'6", Gearhead, Welder, Fabricator, Nutcase 1955 Chevy Stepside "Dudley" My daily http://www.67-72chevytrucks.com/vboa...d.php?t=760288 1972 Chevy C10, Project "Chevro~Layed out" Nether Storm Build Thread http://67-72chevytrucks.com/vboard/s...23#post6007523 |
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#3 |
Registered User
Join Date: Jun 2010
Location: Upland Ca
Posts: 4,143
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Re: Won't crank after installing new fuel sending unit.
Meaning the starter will not turn over the engine or the starter turns over the engine but it will not fire?
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1972 C10 SWB, Air, PS, PB, 350/350THM. Second owner. 1965 Corvette roadster, 44K miles, 327/365 SHP, 4 speed, side exhaust, knockoffs, teak, second owner (bought in 1970), Have ALL numbers matching components. My frame off restoration thread: http://67-72chevytrucks.com/vboard/s...d.php?t=556703 |
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#4 |
Registered User
Join Date: Mar 2013
Location: Shelby, NC
Posts: 8
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Re: Won't crank after installing new fuel sending unit.
I thought it may have been flooded. I had to leave it sitting for work and I tried again two days later to crank it with no luck. It turns over, but either it something with fuel or maybe no spark. When I operate the throttle by hand I see fuel spraying into it. I fixing to go out to the shop and I was just wanting to get some ideas before I started.
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#5 |
I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,993
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Re: Won't crank after installing new fuel sending unit.
Try priming it.Even though you're getting some squirt,you have gotten air in the fuel lines while they were apart to install on the new sending unit.
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The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil" |
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#6 |
Junior Member
Join Date: Dec 2006
Location: Southeast Missouri
Posts: 2,436
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Re: Won't crank after installing new fuel sending unit.
If it is not flooded, starting fluid should allow it to start if it is a fuel delivery problem. If it does not start with starting fluid you will have to see if there is a spark at the plugs.
A wise member of this board, not me of course, has said often what is needed for an engine to run is: air, fuel and a spark if memory serves right. That is what is so good about this board we have so many knowledgeable people that are always willing to help. I have learned a lot from them.
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'67 Chevy C-20 short stepper - build complete, 454/SM-465. '75 C-30 Single Cab DRW-350 small block/NP-435. '77 GMC-6500 Dump Truck, 427 Tall Deck. '92 GMC K-3500 Duallie, 454/4L80E. Last edited by Shyguy; 05-05-2013 at 02:30 PM. Reason: Add info. |
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#7 |
Registered User
Join Date: Mar 2013
Location: Shelby, NC
Posts: 8
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Re: Won't crank after installing new fuel sending unit.
I have some starting fluid on hand. How much should I spray in there? I think it air in the line as well.
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#8 |
Junior Member
Join Date: Dec 2006
Location: Southeast Missouri
Posts: 2,436
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Re: Won't crank after installing new fuel sending unit.
Take the air cleaner off and spray in the throat of the carb, one good squirt. It may not stay running the first time if you have air in the line. Sometimes I have to try 3 times.
See if it starts the first time, like I said it will tell if you have a fuel delivery problem or lack of spark.
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'67 Chevy C-20 short stepper - build complete, 454/SM-465. '75 C-30 Single Cab DRW-350 small block/NP-435. '77 GMC-6500 Dump Truck, 427 Tall Deck. '92 GMC K-3500 Duallie, 454/4L80E. |
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#9 | |
Registered User
Join Date: May 2008
Location: S.W. Chicago, IL.
Posts: 317
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Re: Won't crank after installing new fuel sending unit.
Quote:
What I ended up doing was pulling each spark plug and drying them with the air compressor. A little blast of air into the cylinder too. Once they're dry, I can get it to fire. Wet spark plugs in the sealed combustion chamber ain't gonna dry up anytime soon. Of course, you need to check your ignition system and make sure you are getting spark to the cylinders. Also, check your engine oil to see if any gasoline may have leaked down. |
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#10 | |
Registered User
Join Date: Feb 2009
Location: southeasternfoothillsofusa
Posts: 1,557
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![]() Quote:
Sam |
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