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Posted By: WarWagon New tank / new sender....no start - June 17th 2019 1:27 am
I need you guys to sanity check me please. I just installed a new tank and fuel sender in my '74 b100. Both units were from Spectra. It's the 26 gal aluminum tank. Now it won't start. The van used to run with just portable gas cans in the back with a fuel line stuck in the bottom so I know there isn't a blockage in the line. I've put 8 gallons in so far. Still no fuel coming out of the sender or out of the line from the fuel pump to the carb. This makes me think either the pickup is not submerged or the pump is dead(mechanical pump is only a couple years old). Trying to break either the line from the filler tube or removing the lock ring results in a ton of leakage. What should I try next? I also put a jack under it trying to get the fuel from one side to the other. Should I just keep filling it up? I have replaced the filter and all the soft hoses just in case they were the problem. Has anyone used a new sender from Spectra, should I have bent the pickup down towards the bottom of the tank? Any help would be most appreciated.
Posted By: RichardB Re: New tank / new sender....no start - June 18th 2019 11:50 pm
I Would take a handheld vacuum pump and use it to diagnose exactly your blockage is. Disconnect the closest fuel line joint to the tank, hook up the pump and pull away. If you get fuel there start moving back to the engine, test at every access point. If you don't you know the blockage is in the tank. Either way you can keep moving to up or downstream to wherever your blockage is.

Haven't done a sending unit on a van. But others I've done there has been a small plastic cap you have to pull from the supply line before you attach the filter sock. Hope that's not the case here.

- Rich
Posted By: RichardB Re: New tank / new sender....no start - June 18th 2019 11:51 pm
It's also possible you hooked the supply line to the return line on the sending unit. Which would also cause an issue.

- Rich
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