Aggravating issue....revisited...

[rusty ol ranger]

Heres the original thread....so i dont have to type the whole thing again...

Fuel pump question?

Can high pressure fuel pumps get hot and "weaken"? Ive had this aggravating problem with rusty ever since i got it going. I thought it was plugs but i changed those and put on 6 brand new motorcraft wires. It runs excellent 99% of the time, but after driving a while it sputters a bit on take...

www.therangerstation.com

Anyways....one suggestion that came up was the fuel filter, which i did change but it was when it still had the old fuel tank in it so who knows what got sucked up into it.

Well when i changed the filter before the line was stuck on the filter and when i pulled it all came apart.

So i had my mechanic put a new line on....and he used this...

Could that 90* bend be causing the issues im having?

 

[Curious Hound]

It shouldn't.

 

[rusty ol ranger]

It shouldn't.

Damnit.

 

[PetroleumJunkie412]

Odd question.... whens the last time you tossed a tfi at it?

Also, still running the ecm i sent your way?

 

[rusty ol ranger]

Odd question.... whens the last time you tossed a tfi at it?

Also, still running the ecm i sent your way?

When i did the distributor....so a year ago or so.

....and yes its got your ecm in it.

 

[JerryC]

I was reading the original post and this stood out, you said if it turn it off it runs ok for a couple of minutes.
So maybe it runs fine off the open loop ECM map but when it goes closed loop you have the problem. That would point to a sensor issue.

 

[rusty ol ranger]

I was reading the original post and this stood out, you said if it turn it off it runs ok for a couple of minutes.
So maybe it runs fine off the open loop ECM map but when it goes closed loop you have the problem. That would point to a sensor issue.

Every sensor besides the TPS and MAP is new. Its getting 21-22mpg so i dont think its an O2 or something dicked up. After talking to @PetroleumJunkie412 the other day i realized that it didnt do this before i timed it and deleted the EGR.

So im gonna recheck the timing and properly block off EGR before i go to crazy into it.