Expedition doesnt have power on first gear

I'll do that first thing tomorrow, anything I should know about after the fuel pressure test? Like worst scenario if the pressure fails and if it not? Thanks.

I know its unbelievable but all the mechanic shops I've been to doesn't have a fuel pressure gauge. But ill still keep on looking. Anyhow just to update my troubleshooting with the expedition, I had a check engine recently I think it was my fault, I unplugged the heat sensor while the engine is running then plug it back in and poof check engine showed up so I brought it near a service station that has a auto scanner and it was the ATI showing problem so they replaced it. And I told them the problem im having with the engine. They did I think an overhaul with the throttle part and flushed out the grease like oil in the throttle area and out in the exhaust, but there is still hickup like and hesitation with the acceleration the mechanic told me it could be with the pcv now. I took the vehicle home before they start replacing the engine. So my problem would still be the acceleration, sometimes it would engaged sometimes it wont, I still here occasionally pop sound under the hood when I step on the gas half way down, another mechanic is saying it could be the air sensor, im checking if I could clean it myself or just get a new one. I'm close to replacing everything now except the fuel pump. Right now the engine rpm keeps on fluctuating but the engine doesn't die out. Just no power to accelerate.

Sorry IAT and PCV valves

After parts and parts I think they nailed the problem and it was the fuel pump problem though I still have some doubts, the mechanic replaced the motor only not the whole assembly at first it didn't start right it was still having hesitant in acceleration so I was ready to put the car on fire. My fuel was running empty so I have to fill her up and had the battery tightened and it just started to drive smoothly. Do you think a bad fuel might have been the problem? Or was it I have to reset the computer when I disconnected the batter to have it tightened? Anyway right now its back to normal although I see some changes like is it normal the see the RPM rev high when I shift the gear from drive to neutral?

Thanks again.

Hi mhpautos,

Thanks for assisting me troubleshooting my expi, I jsut have a quick question, prior to the replacement of the fuel motor, I saw the fuel sensor broken and was dangling at the side the the fuel assembly, I wanted to know what the fuel sensor was for. It was broken on the attachment from the top of the fuel assembly. So it wasn't in place but the mechanic just glued it back on. Did that possibly helped my fuel pump to work again?

Thanks

Attached is a picture of it. Its the square one that was dangling when the mechanic pulled out the assembly. Also is it normal for the engine to rev 2krpm when you cold start it?

Thanks.