I have an odd one here gentlemen. I hope you can give me some ideas. Recently my fuel sending unit was on again, off again, and would occasionally start with a kick to the bottom of the gas tank, but it finally stopped working all together. Being tight on money, I replaced it with a used one, which was one hell of a job, for me. After hooking everything back up, it started right up, and seemed to be running fine. However, when I switched from park to drive, and gave it gas, the engine revved up like I would expect, but the truck had a very slow start. I'm having trouble explaining what I mean. THe engine would rev, but the truck would just barely start moving. Though it does get to normal rev/move status, and once it gets moving, it reacts just like it should. Transmission seems attentive to the gas I give it. It's just the starting out is so oddly sluggish. It had done this on three or four runs, then I took and put $20 in the gas tank, and the when I attempted to start it back up, it did that turn over very quickly sound but would not start. I did this several times, and almost gave up (this was at the gas station). I finally pushed the gas pedal to the floor when turning the key over and it started up. I was under the impression with the fuel injection you didn't need to do that. Anyway, after finally starting, I immediately noticed that the truck took right off from a stopped position, which it hadn't done since the fuel pump change. It was a short trip, worked right the whole time. Parked it at home, got in it this morning, and it was right back to the strange sluggish take off. It's probably important to mention that I hadn't had this trouble in ANY way prior to the fuel pump being replaced. I'm totally baffled, and would GREATLY appreciate any help on this.

 

Trans: Check your fluid level, in neutral, on a flat spot. Checking it in park won't work. Need to be sure the fluid level is up to snuff, and the fluid looks/smells ok.

Putting the gas to the floor while starting puts the truck in "clear flood" mode, and it will still shoot some gas, but, not a heck of a lot. If the truck is flooding out when trying to start it, need to verify that temps sensors are good, and plugged in nicely. Trouble is, the one you are most concerned about, is behind the alternator/A/C compressor.... such fun. You might be able to get your hand down there, but, don't bet on it.

Did you reset the PCM after the fuel pump replacement?

 

sounds like you may of gotten a shotty pump..my old bronco did this when the pump was on its way out..i thought the trans was going..check your fuel pressure...

 

Thanks "Hey You" and "Mrfarrell" for your replies! I was unaware that you needed to be in neutral to check the transmission fluid. That was the very first thing I did, but I was in park, and on a very slight incline. "Hey you", When I read your question about resetting the PCM, it reminded me of another thing, which is the "check engine" light, that had not been on before the changing of the tank, is now on. I don't have any idea what the PCM is, but if it's something that would cause the check engine light to come on, I'd bet that could be part, if not all of the problem. How do I reset that?
And thanks again for your help on this, I REALLY appreciate it.

 

Do this and see what codes come up https://dodgeforum.com/forum/2nd-gen...code-list.html

edit btw, I'm also thinking the fuel pump is junk.