hi guy
as I driving down the road and my truck LP work as normal and all of a sudden i have no power to the LP at all. Stop , turn off the engine and unhook the connect at the LP and remove the fuel pump relay and put it back same as the connector by the LP , very much like unplug and plug it back up then put the test light at the LP connector, then it back to normal, then as my way home about few miles down the road i have no power to the LP against. Anyone run into that kind of a problem and what do you guy think what i should be check at? oh and it happen after i remove the driver side battery to test my boat and when i put the battery back then i have no power to the LP like off and on , off and on ,... thank for yoour help

:think: power to the lp relay comes from the op sensor -- but that only controls the "active" side of the relay -- not the power "load" side of the relay -- I had a bad ground behind the battery on the drivers side that seemed to be a similar ground or tied into the same ground"s" for the primary side of the LP relay --- just food for thought I think---:think:

OPS is bad. Try to override the OPS with 12V source direct to LP and see if you can get it running without issue. Don't make it permanent because it will keep running when engine is off.

If you change OPS, make sure you get ACDelco OPS.

thank for all input guy, JMJNet that is what i have been thinking about the override switch to the LP in case if it hapen later down the road then i can flip on the switch and flip it off when the engine off, and still the switch is just incase when the OPS when south cause i dont think is good for the IP to pull the fuel by iself

There is mod where you can add a relay which is essentially override the OPS to supply electricity to the LP but it still uses the OPS as a trigger switch.

http://mysite.verizon.net/vze54tx9/id13.html

If you don't have the time, Kennedy Diesel sells this harness also.