P/N for that Nissan pigtail harness is 24028-FL00A

If this is an F-series truck, that has the up and down arrows on the dash there is a fine mesh screen under the elbow where the fuel hose connects to the injector housing. A lot of times there is a tar build-up on it and it will not allow fuel to get to the injector. There is also an O-ring on the injector that could be bad and flooding the motor. Can you hear any fuel pressure when you shut the key off? If you do then you may have a vaporizer problem or bad injector. The L-series truck has the screen under an oval cover on top of the injector holder opposite from the fuel line.

The lift starts and runs for a few seconds the dies. It throws the E-35 code and then will not start for a few seconds. Then it will start and do the same thing. We have been changing sensors and checking everything we can think of. Any help would be appreciated.

If it isn't starting the E-35 code is an open or shorted circuit for the LPG fuel injector. There is a 5 amp fuse in the red wire on the injector harness that might be blown. Injector should have 1 olm between the connector pins of the injector itself. And I'll have to get you a p/n for that pigtail.

I have a Nissan 40 lift that is giving me the E35 & E36 codes. Can you give me the part number for the pigtail and do y'all have any idea about the E35 code?

we checked regulator pressure, running it's 4.5-5lbs.
Checked connection at LPG Sensor; OK
Truck starts good but has no horse power under load
Still showing Code E36

I have just about always found this to be an issue with the connector on the LPG pressure sensor. Nissan has a short pigtail harness available to clip and replace the bad connector if necessary. Don't have the p/n at the moment but I can get it for you if you need it.