My truck is idling rough so my mechanic did a fuel pressure test and concluded that I needed a PRPS so I changed it out the next day. Well I made it 4 blocks and truck died. Turned but wouldn't start so I put the original FRPS back on and it cranked right up. Faulty Semsor ? Truck is still idling rough so what else could it be? And when under acceleration something is rattling. The muffler guy raised it and checked and said everything is solid so what else could it be ? I've read about a loose spark plug?

 

Tell us more about your truck, what engine,etc. Could it be pinging? bad gas?

 

06 f150 w/113k miles. About 3-4 moths ago I had a misfire in which I changes all my plugs and coil packs, fuel filter and FPDM.after that everything was fine until this pas Saturday when I was pulling up to the boat show and my truck bogged down (like the alternator was having problems or something fuel related) so I had it scanned for codes and 3 codes came up. P0193 2xs with seperate explanations and a p0174. The next dat I changed my alternator because it was only 1 year new and then had it scammed again and only 1 code now (p0193) so I brought it to my mechanic and he pressure tested the fuel line and said it was the FRPS. I purchased a new one and replaced but not 7 blocks down the rd I turned it off and it would not crank(turn over but not crank) kind of fuel hungry. Today I got home and had the bright idea to swap the old FRPS with the new one. Well but cranked right up but it still has a rough idle and throwing the code (p0193) wth ?

 

Unless the fuel pump screen is clogged, I would think the pump would just fail completely with next to no pressure, not reduced pressure. I'd lean more to the FPDM, or a pinched line or something. I'm not a mechanic, I'm just a dude, so I could be completely wrong. I have heard of aftermarket FPDM's going bad in a short amount of time though.

 

Was the FRPS replaced with OEM?

 

Thought we already talked about this in another post ??

 

UH OH, double poster, better alert the Mod God's, lol

 

Sorry I'm just trying to figure out what's wrong with my fuel system

 

The sensor is defective or somethjng so i put the original back on and truck runs but still has rough idle. I purchased it from oreillys

 

Please post the solution once you find. I am currently having the same issue.