Well got my hands on a snap-on computer it can read but not change anything. I still reading -38 temp in Florida. No check engine but stored codes on both computer ( p0158, p1179,p1177,p0451,p1317) on top of watching live it says road speed is anywhere from 1300 mph- 20k mph. Tried unplugging seed sensor didn't change anything. So now what I don't have use of computer for long just this weekend. We spent half day chasing wires. I can unplug sensor with no change except maf kill the engine. Put used computer on and get close to same reading.

 

P0451 Fuel Tank Pressure Sensor Signal Error Fault.....

The fuel tank pressure sensor is tied into the throttle position sensor. It's all in the ETM. You should be looking under the fuel pump inspection cover in the cargo space and tracing the pump pressure sensor wires through it's connector and back up to the throttle sensor. Tom R couldn't get his truck to start because of that, prior if it did start it ran like garbage. Without being there it's hard to know but I'd be checking the pressure sensor and it's wires.

 

Hey guys well gave me the run around even broke down took it to shop. It gave them the run around. Tested the replacement parts. So I know that they are good and some of the old parts are good. Great compression and had them scratching there heads. The fuel psi gauge drop to zero and didn't psi. Replaced the fuel pressure reg it got better. But still acted up I have the advanced evap. Gem motor. I picked up new fuel pump senser unit replaced it today. Done fix no issues, no high idle, doesn't drop psi, doesn't start rough or mis fire. This thing runs like a champ now.

 

glad you got it sorted - thanks for posting how you fixed it!

 

What is the part number and where did you buy that fuel pump sensor from?

 

EBay from all European auto parts. Delp # wfx101020 I won it for $260. They are going for $350ish I've seen. They forgot the seal so I have to wait cpl extra days for them to send it to me.