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Losing fuel and rail pressure. Help!!!!

1486 Views 23 Replies 3 Participants Last post by  Cummins0512, 
Cummins0512
K so about 3 weeks ago I installed a fass 150 with sump on my 05 cummins. I also did injector nozzles which are now 90hp. When I got it going it ran fine at first then half way to town it just dropped fuel and rail pressure and died. Then it would start back up and run for about a half a kilometer and die again. Keeps doin this. Double checked everything and everything is torqued properly and seems too be working. Now when I got it all finished I used my smarty jr to tune the truck and half way through the download it threw a code. So I unhooked the fass because that seemed to be the problem and it fully downloaded. I should also say I tuned it before my first test run. Any way that could b causing the problem? I set it back to stock and is at a buddies shop right now and they are stumped. Please I really need to get this truck back up and running before winter because I need it for towing. Thanks. Also did factory fuel filter delete
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Cummins0512
Yeah it's really weird.
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Patsfan313
I havent had the issue with the rail pressure, however, with my fass installed my smarty will do the same thing. Not 100% sure why it happens but the issue is resolved by disconnecting the power to the fass and reconnecting after the tune is loaded.
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Cummins0512
Hmm well I'll probably be bringing the truck home tomorrow and putz with it myself. No point paying money if they don't even know what they're looking for
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Cummins0512
Well trucks been at the mechanic for 3 weeks now and they still are stumped. Now the rear crankcase is leaking oil. Stupid money pit no clue what I'm gonna do about this thing. No money to make repairs. Pissing me right off
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