It's a Toyota Forklift, Model 7FGCU15, with a propane gas system. The Lift won't start consistantly. Once the gas (propane) system is hooked up by not opened the lift turns on. But once I open the propane valve and try to start again, no good. The regulator is good to go. The solenoid for the gas flow on the regulator works great when the propane isn't hooked up and turned on. Once I open the valve for the propane, I can't feel the solenoid working anymore. The volts are good going into the solenoid. I would like to check the vacuum sensor, but I can't get a reading with my meter. I may be doing it wrong, (the testing on said vacuum sensor) The vacuum sensor is a Denso 5volt 079800-4410. Any ideas or hints please.
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the solenoid in my regulator is getting intermittent power (on -off) until the truck shuts down, (RPM going up and down.) I checked the relay and its getting intermittent power too. Test light on relay flickers during crank and would hard start but shut off immediately. Wheres the next circuit to check? Can I just put a positive power line to the relay connected to the start switch.
is this the regulator with the solenoid attached to it?
yep replace the whole thing
i went down the same road bbforks did a while back
save yourself the trouble and just put a new one on
that should take care of the problem'
What is the voltage going to the sol.? They have a relay that energizes the lp sol. and sometimes they mess up. I think there are 2 relays under the fuse box, they are interchangeable.
No, It's been being used for years now. It may be one of two of our oldest units.
Has the unit been sitting without being used for a while?
I've had the same issue- electric shut off valve works with no lp pressure in line- unfortunately the only repair that has worked for me is replacing the entire regulator assy w/the new shut off valve installed as part of the package.
I've replaced the shut off valve but kept the seemingly good regulator to end up with the same symptoms. I then rebuilt the regulator but still no better. I can't tell you why ( I wish I knew) but replacing the entire regulator was the only repair that worked.
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