94turboidi
Full Access Member
Okay the truck has been running great. I have only been running on the rear tank as there is no front tank just the lines at the selector valve. I just pulled a tractor 100 miles home and no problem. Well I have an aluminum tank that holds 11 gallons that I wanted to hook up to switch between diesel and wvo.
I built a treated plywood hotbox with a heat exchanger under the tank and ran coolant lines to that and back to the engine. I was very careful to not allow them to get too close to exhaust and also put rubber insulation inbetween the hoses and anything that might cut them and its all ziptied. I even made a little heat shield in one spot to protect it from heat. I hooked up everything and ran the 3/8" line from the selector valve for supply and the 5/16" for return. I let it warm up yesterday in the drive and tried to switch over and it died. I figured it was whatever air was in the new hose which was only about 6' plus 1' of a suction tube in the tank. I got it switched back to diesel and started again and tried again and the same thing. Today I decided I would take it on a longer drive.
I got it all warmed up was headed down a hill and switched over, as I started heading back uphill I could tell I was sucking air and then I switched back but couldn't keep it going and had to get it started on the side of the road. I left it on diesel only and drove the rest of the trip about 30 mile round trip. Whenever I get the engine close to an idle it is jerking and acts like its about to die. Like its still sucking air even though I am driving. Going down the highway its not too bad but you can still feel it. It jerks like crazy unless you downshift or clutch it in through town. To top it off coolant is coming out of the overflow on the radiator even though the engine isn't running hot (brand new coolant sensors).
I can't understand why I can't run normal on diesel only now? I am going to mess with it today but I am at a loss unless something is wrong with the selector valve now? I haven't used the valve before now. I can hear it sound like its switching when the truck is off if I flip the switch.
I know everyone hears this when people are working on their truck but I am getting frustrated lately with this truck! I was planning on heading to South Dakota at 5am but I can't pull out with it running like this. I can't even run on diesel reliably now.
I built a treated plywood hotbox with a heat exchanger under the tank and ran coolant lines to that and back to the engine. I was very careful to not allow them to get too close to exhaust and also put rubber insulation inbetween the hoses and anything that might cut them and its all ziptied. I even made a little heat shield in one spot to protect it from heat. I hooked up everything and ran the 3/8" line from the selector valve for supply and the 5/16" for return. I let it warm up yesterday in the drive and tried to switch over and it died. I figured it was whatever air was in the new hose which was only about 6' plus 1' of a suction tube in the tank. I got it switched back to diesel and started again and tried again and the same thing. Today I decided I would take it on a longer drive.
I got it all warmed up was headed down a hill and switched over, as I started heading back uphill I could tell I was sucking air and then I switched back but couldn't keep it going and had to get it started on the side of the road. I left it on diesel only and drove the rest of the trip about 30 mile round trip. Whenever I get the engine close to an idle it is jerking and acts like its about to die. Like its still sucking air even though I am driving. Going down the highway its not too bad but you can still feel it. It jerks like crazy unless you downshift or clutch it in through town. To top it off coolant is coming out of the overflow on the radiator even though the engine isn't running hot (brand new coolant sensors).
I can't understand why I can't run normal on diesel only now? I am going to mess with it today but I am at a loss unless something is wrong with the selector valve now? I haven't used the valve before now. I can hear it sound like its switching when the truck is off if I flip the switch.
I know everyone hears this when people are working on their truck but I am getting frustrated lately with this truck! I was planning on heading to South Dakota at 5am but I can't pull out with it running like this. I can't even run on diesel reliably now.