hemsteadc Posted July 1, 2021 Report Share Posted July 1, 2021 (edited) The problems with this truck just never end. 2008 FL Sportchassis Cummins 8.3L When the truck is parked on a slope, facing uphill, it takes a lot of cranking to start. Anyone know why? Edited July 1, 2021 by hemsteadc Quote Link to comment Share on other sites More sharing options...
Darryl&Rita Posted July 1, 2021 Report Share Posted July 1, 2021 Time to verify that your lift pump is working. Classic symptom. Quote I have been wrong before, I'll probably be wrong again. 2000 Kenworth T 2000 w/N-14 and 10 speed Gen1 Autoshift, deck built by Star Fabrication 2006 smart fourtwo cdi cabriolet 2007 32.5' Fleetwood QuantumPlease e-mail us here. Link to comment Share on other sites More sharing options...
hemsteadc Posted July 1, 2021 Author Report Share Posted July 1, 2021 (edited) Thanks.. I'll see what SC has to say. They may be getting tired of hearing about my problems. Edited July 1, 2021 by hemsteadc Quote Link to comment Share on other sites More sharing options...
TD1 Posted July 2, 2021 Report Share Posted July 2, 2021 another thing you can check is just go around and snug up all the fuel line connections that you can get a wrench on. Another thing to look for that ive seen is those plastic or synflex fuel line will lay up against or on something on the chassis and rub through it starts as a very small pinhole and causes hard starting or low power until it gets so bad it wont start at all. If the system is allowed to draw in air in anywhere it will siphon back. Some of the trucks with duel tanks had a valve in the return where the lines tee d and went to there respective tanks. It may have a rubber flapper and spring to prevent fuel drain back as well Quote Link to comment Share on other sites More sharing options...
hemsteadc Posted July 4, 2021 Author Report Share Posted July 4, 2021 On 7/1/2021 at 6:58 PM, TD1 said: another thing you can check is just go around and snug up all the fuel line connections that you can get a wrench on. The tanks aren't always equalizing either. Quote Link to comment Share on other sites More sharing options...
TD1 Posted July 4, 2021 Report Share Posted July 4, 2021 That can be tricky. could be as simple as a fuel cap when I worked at freightliner there was a t/s flow chart for the tanks not equalizing don't remember the specifics. I would try googling it. I would bet the problems are related. the lower of the 2 tanks may have a plugged vent in the cap so not really building pressure but holding enough pressure that fuel goes to the other side. I believe the valve where the t on the return fuel side has a check valve in it as well as some kind of shuttle valve that works with the fuel caps to send the fuel to the lowest tank when working properly you can fill one side take off driving and they will equalize after while. lines to return from t fitting have to be of similar length size and routing as not to add any resistance to flow difference. if everything looks good i would try swapping caps from side to side and see what happens Quote Link to comment Share on other sites More sharing options...
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