Help. Chasing a hesitation issue

[Matt Conner]

If the PCM thinks you're running too lean, it'll add fuel and possibly foul spark plugs too. Even maybe plug the cat with un-burned fuel?

EDit: Oops I forgot you don't have a cat, huh?

I flashed the codes and got code 54, on the 95 is that the fuel circuit failure code?

 

[PlayingWithTBI]

That's what it looks like. Does your fuel pump come on for ~2 seconds when you turn the key on? If not it's relying on your oil pressure switch to turn it on.

What's your fuel pressure? As suggested you may have a partially plugged filter or weak pump.

Did you check your base timing with the EST (Black/Tan) wire disconnected? It s/b set @0*

 

[Matt Conner]

That's what it looks like. Does your fuel pump come on for ~2 seconds when you turn the key on? If not it's relying on your oil pressure switch to turn it on.

What's your fuel pressure? As suggested you may have a partially plugged filter or weak pump.

Did you check your base timing with the EST (Black/Tan) wire disconnected? It s/b set @0*

The pump runs when you cut the key on but it sounds super high pitched, and I can hear it going down the road . I haven’t got a way to test fuel pressure but I’m going to change the filter today, I will also check base timing

 

[PlayingWithTBI]

I haven’t got a way to test fuel pressure

You can borrow one from your favorite parts house that goes where your fuel filter does. Or go here and order the fuel pressure adapter and gauge. You could also get the AFR.

http://www.rvmorsemachine.com/product.htm

It looks like this installed.

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Either way, you should know what your pressure is.

 

[Matt Conner]

I changed the filter and drained it in a dry empty water bottle and it appeared to have water in the gas

 

[PlayingWithTBI]

I changed the filter and drained it in a dry empty water bottle and it appeared to have water in the gas

That could do it, LOL!

 

[Matt Conner]

That could do it, LOL!

I hope that it’ll clear up some, I don’t know how to get the water out without draining the tank


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[PlayingWithTBI]

I don’t know how to get the water out without draining the tank

You can disconnect the supply line to the TB, jump the fuel pump relay and pump it into a bottle until the water goes away and you're pumping nothing but clean gas. Plus maybe add a can of Heet to help absorb it?

 

[Matt Conner]

You can disconnect the supply line to the TB, jump the fuel pump relay and pump it into a bottle until the water goes away and you're pumping nothing but clean gas. Plus maybe add a can of Heet to help absorb it?

I sure do hope it’s just water making the truck act up, I don’t know why In neutral you can rev and rev and rev and it not stutter or hesitate but only does it in hear, especially in 4th gear, and I cleared the 54 code out and drove around for awhile and it hasn’t set that code back in the ECM,


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[PlayingWithTBI]

Keep plugging away at it, fix the cheap stuff 1st. Then see what happens. There's an old saying - after you eliminate all possibilities whatever remains, no matter how improbable, must be the solution.