Last weekend I installed a reman ip in my truck. It ran great for about 100 miles and now its back to low power hot, low idle,being noisy and sluggish its also struggling to get past 65 again. Everything is new in the fuel system and I even checked the fuel pickup. The pump has a 1 year warranty but I'm not sure if i got a bad pump or if its something with the truck. What should I do next?

 

Injectors.

You replaced everything else.

 

I forgot to mention that,injectors are brand new bosch and fuel pressure always runs around 3-10 psi.

 

Are the injectors set to open at 245 bar?

 

When you loosen the fuel cap after running the truck, does it hiss?

 

Another thought is you have pressure but do you have flow? I.E. have you checked the pickup screen?

 

Those are the next things that I would be checking.

 

Funny you mention this....I hear mine do that everytime I fuel up. Does the cap need vented and could this cause (what type of problems) ?

 

Ok I went back and checked every again and didn't find anything unusual. I bumped the timing an 1/8" and installed another lift pump and it still acts the same.Also the injectors are set to 245 bar and I already cleaned the vent on the tank. What exactly is breaking inside the pump to cause these symptoms?

 

Same here..... I wonder what might be happening.......

 

the cap should be vented and your cap needs replacing!!
my ex-cop cars check engine light wouldnt go away! one reason i got such a good deal on it!!!
a new cap and shes all good now!!