engine stumbles and surges
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engine stumbles and surges
Other day heading to work truck was running fine, a block away I flipped over to my rear tank as I had 1/4 tank left in the front. Got to work and shut down the truck.
At the end of my shift I started the truck up 20 minutes prior to leaving to allow to warm up. When I pulled away and got to a red light the engine almost wanted to stall while idling. So I pulled over and yanked my fuel filter out and no water in it. Fuel filter has 1000miles on it. Put it back in and still stumbled. Got out of the city and on the highway the engine was surging. So I flipped over to the front tank that had 1/4 left in it and ran fine the rest of the way home.
So with that said, both tanks were filled up at the same time and truck ran fine on the front tank. No water found and filter has 1000miles on it and is clean. I'm thinking a possible bad fuel tank splitter valve or a bad fuel line quick connect and I'm sucking air from some where between the rear tank and the splitter valve to the engine. What do you guys think????
At the end of my shift I started the truck up 20 minutes prior to leaving to allow to warm up. When I pulled away and got to a red light the engine almost wanted to stall while idling. So I pulled over and yanked my fuel filter out and no water in it. Fuel filter has 1000miles on it. Put it back in and still stumbled. Got out of the city and on the highway the engine was surging. So I flipped over to the front tank that had 1/4 left in it and ran fine the rest of the way home.
So with that said, both tanks were filled up at the same time and truck ran fine on the front tank. No water found and filter has 1000miles on it and is clean. I'm thinking a possible bad fuel tank splitter valve or a bad fuel line quick connect and I'm sucking air from some where between the rear tank and the splitter valve to the engine. What do you guys think????
Cargo Master
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My first assumption was going to be a pickup screen that is dirty or clogged. However I wouldn't believe this to happen on a full tank. Any chance you can monitor your fuel pressure at idle, and or crusing speed?
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I'll try the pressure gauge out when it warms up a bit, that might tell me if something is up compared to the front tank usage.
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Good to know, I might have cracked a line or something when I had to siphone the tank out 1.5 years ago or so when the fuel station put gas in my rear tank and I had to drop the rear tank to suck it out. I could'nt suck it out from the fuel fill cause of my dually kit that was an add on and I did'nt feel comfortable getting it all out with what I was getting.
Cargo Master
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On my front tank I removed a plastic cylindrical deal in the end of my front vent line. I anticipated it would speed up filling/reduce foaming. Well it may or may not have done that. I noticed similar conditions and though plugged screen, but it happened on both tanks( I think...) on various occasions in different driving conditions. I also thought water in idm. Tested that and found no water. I replaced the piece in the vent line and haven't had the issue in a month or more, so I am thinking it was sucking air for some reason.
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