2 steps forward, 1 step back: WHAT NOW!

[Bilgamesh]

I got my carb exchanged and mounted, and I replaced my headlight switch. While I was at it, I replaced my locking gas cap. As I was driving over the dam, the engine cuts out, in for a while then back out, in and out all the way back home, where it idled fine. I recalled reading some posts about vapor lock, so I removed the cap to a whoosh sound. I then realized it was not vented, and pressurized the system. That is when this problem started, so I put the old one back on hoping it would clear up. Not so, as it was worse today than ever. I pulled the fuel filter and sure enough some black grainy material poured out. I replaced it, but I still have the same problem. I am wondering if the pickup may be clogged, or so much junk got loosened up in the lines that has already re-clogged the new filter. Any thoughts?

If this is the problem, how do I go about cleaning the mess out?

Thanks

 

[drajj5]

First 100 or so miles after the maiden voyage in mine I had the same prob. See through filter was literally filled with same "STUFF". I changed filter with new and would then be able to drive just beyond walking distance from the house and be left stranded. Next changed manual fuelpump 'next day', and still had problem. Left it till weekend, finally I pulled sending unit out of the tank and found the sock caked with "stuff", broke down and bought new sending unit....problem soved! Good luck!
BTW, washed loose debri out while tank was on the ground

Don

 

[2horsegarage]

check your tank

I have seen gas tanks "buckle" when run with a non vented cap. THe pressure change causes the tank to kind of suck in. When it happens, it loosens the crap inside the tank and can cause some problems.

 

[Bilgamesh]

I removed the tank. It is full of rust for sure. The P/O fashioned a screen for the pickup out of aluminum window screen. There was no junk clogging it, but the mesh is pretty large. I am wondering if it clogged the filter again. In the meantime, I need to figure out how to clean this tank.