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[SBCNX20]

The truck has developed a problem, yesterday it seems to have lost 20-30% power. Now I only have had a very mild stock ish tune in it for the last 3-4 weeks now due to snow cold etc. My first thought was Fuel Filter so I replaced it last night (no change), now this AM DTC light pops on so I scan and it tells me I have PO181, CO245, and B2575 any idea's? Oh yah almost forgot it seems to be Rattling alot at part 30-40% throttle???????????????? Dont know!!!!

 

[SIKDMAX]

P0181 Fuel Temp SensorA Circ Range/Perf

Got a headlight out, or used to have one out? DTC B2575
Headlamp Control Circuit

And a wheel speed sensor - ever replaced a hub or off roaded or had the front end submerged in water? DTC C0245 Wheel Speed Sensor Frequency Error

 

[SIKDMAX]

Your in Mass.... fuel temp - possible gelling perhaps? Whats the outside temps been? Have you been using a fuel additive? Sorry im shooting in the dark here from what those codes are, seems all unrelated but possible your main problem is the first one Id be thinking.

 

[Diesel Pilot]

SIKDMAX (not skidmax) beat me to the punch.

That fuel temp sensor is causing the rattle likely. Also FWIW, my LLY rattles like crazy if I put crappy winter blend in it without an additive. I've been putting a small amount of B20, that seems to help a bunch too.

 

[sweetdiesel]

ive had that code before from plugging in my blockheater and woke up in the AM and it was warm out??? just throwing this out there

 

[SIKDMAX]

Hey now - some may not like me but come on, Skidmax? :rofl:

Run the white bottle of Diesel Kleene - its the winter blend formula of the grey version which I run every tank.... awesome stuff!

 

[SBCNX20]

It cant be fuel gelling weve only had 1 real cold day and even at that it was about 2' out. I just added some more power service last night with the filter change just in case. Hmmmm Im gonna clear them again and go log a drive around town. I wonder if the fuel cooler was pluged with snow and the fuel temp went crazy?? And I just put my winter cover on the grille. That would only add more heat in the Engine compartment. I'll be back and let ya know.

 

[Diesel Pilot]

Hey now - some may not like me but come on, Skidmax? :rofl:

HA! I just noticed that. Sometimes my fingers go faster than I want. Sorry.:rofl:

 

[SIKDMAX]

Thatd be best SB. Go clear your codes and run around a bit and see what happens. Report back!

 

[sweetdiesel]

thinking outloud,but if the fuel cooler was plugged with snow...wouldnt this decrease fuel temp,temps of fuel would raise fast and melt the snow also


NO?

 

[SBCNX20]

Ok cleared codes drove a bit and still low power and the C0245 no other codes Yet, BUT rattle seems to be better. WTH is going on here???? I wonder if my pre filter that came with my FASS system could be a problem? Though the log looked fine as far as fuel temp,pres. Boost goes to 20-22lbs etc. it almost feels like it is surging a little at WOT. This tune has a TINY itty bit more fuel than stock and a timing curve from a Race tune someone gave me, EGR shut off and that's about it. Up until now it has been great! Good milage, and ran pretty strong for being almost stock.

 

[SBCNX20]

QUOTE=sweetdiesel;30158]thinking outloud,but if the fuel cooler was plugged with snow...wouldnt this decrease fuel temp,temps of fuel would raise fast and melt the snow also


NO?[/QUOTE]

Yep. please dont mind me (having a nervous breakdown over this!!!!) cant think straight.

 

[SIKDMAX]

Pull your tune out and go back to stock, see if it still does it. That code is totally unrelated to this. Wheel speed sensor.

 

[McRat]

While everyone is busy buying boost and EGT gauges, the most handy one is a Fuel Pressure/vacuum gauge right before the CP3.

My guess is fuel supply. Romp on it and see how much the desired Fuel Pressure exceeds the Actual.

 

[LarryJewell]

Ok cleared codes drove a bit and still low power and the C0245 no other codes Yet, BUT rattle seems to be better. WTH is going on here???? I wonder if my pre filter that came with my FASS system could be a problem? Though the log looked fine as far as fuel temp,pres. Boost goes to 20-22lbs etc. it almost feels like it is surging a little at WOT. This tune has a TINY itty bit more fuel than stock and a timing curve from a Race tune someone gave me, EGR shut off and that's about it. Up until now it has been great! Good milage, and ran pretty strong for being almost stock.

Have you ever changed the Fass filters? I change the Fass every 10-12K miles and the factory fuel filter every other oil change, Yea it costs a lot of money, but it eases my mind.

 

[SBCNX20]

Have you ever changed the Fass filters? I change the Fass every 10-12K miles and the factory fuel filter every other oil change, Yea it costs a lot of money, but it eases my mind.

I dont have the full FASS pump/filter setup it's just a pre pump filter that came with the basic kit. Gonna change it tomorrow when I find a 1/2inch in-out push on somewhere.

The log didnt show any difference in Desired vs Actual Pressure???????? another Hmmmm