W.O.T all the sudden no power!

[03dmaxkolb]

so this jus randomly started happening. was at WOT and all the sudden it was like you jus turned the key off. however my foot was to the floor. now its happening more frequent. actually got on it today and when i came to a stop it died! replaced fuel filters. airdog psi is still set at 12 psi. no unsual smoke. i assume the rail is running outa fuel? stock injection pump been tuned for about 2 years i dnt persay baby it! any thoughts or ideas please share!

 

[Bryce418]

Any codes? Kinda sounds like the limiter popping open.

 

[03dmaxkolb]

nope no codes. limiter?

 

[03dmaxkolb]

i guess i should add i drained the water seperator the same day this bullshit started happening?

 

[Bryce418]

Rail pressure limiter. I don't know what model you have, (phucking tapatalk) but lb7 is down in the valley all others are on the back of the drivers rail.


Which seperator did you drain? I have seen them not seal well after draining.

 

[blk smoke lb7]

Was it getting hard to start? Could be the relucter wheel came loose posibly you could have blown the fuse for the ficm also i had that happen

 

[03dmaxkolb]

the water seperator on the airdog with the drain fitting. and it isnt hard to start. and its an 03lb7. ya il check the fuses were guna hook it up to the scanner this week and we ll c jus a lil confused

 

[x MadMAX DIESEL]

Did you change tuning recently? Mine did that for about a week after I loaded a different tune, ill look at some logs and try and see if I can figure it out. I think my problem though was just a table or 2 that didn't like eachother.. iirc rail pressure fell to around 2,000. If I let out of it easy I think it was fine, just lifting heavy made it do that. It was along time ago though.

Sent from my PC36100 using Tapatalk

 

[03dmaxkolb]

havent thrown any codes. and it doesnt matter wat tune when it gets wound up its jus falls down instantly it will come back if u let up and get back in. havent hooked anything up but were guna look at rail psi this week

 

[bondurch]

I had a similar issue running multiple tunes with a dsp 5 switch. I was going from near stock tune to robs "bat out of hell" tune. This seemed to create issues with the torque tables with in the tcm causing the truck to dead stop while WOT. I cleared the taps on the tcm and all was good. Don't recall the exact details on the ECM and tcm torqu table issues, but something was telling the tcm that to much torque was being delivered causing the power to be reduced.

Reset tcm maybe that's the trick?

 

[03dmaxkolb]

hmmm its is alot like a defuel it jus flat shuts down! its been tuned for 2 yrs. ya i might reset the TAPS and c

 

[Bryce418]

I wonder if the seperator drain isn't sealing well and creating a leak. Anyone know if the air dog seperator is on the vacuum or pressure side?

 

[03dmaxkolb]

i would think vaccuum but not for sure. i might mess with it abit it isnt leaking.

 

[Bryce418]

i would think vaccuum but not for sure. i might mess with it abit it isnt leaking.

That was my thinking too. Depending on tuning I would expect some sort of rail pressure code though.

 

[czmwyte]

Did you ever figure out what the problem was I have been having the same exact problem I have already replaced FPR, cp3, fuel lines, I did a sump, and also an AirDog 150 GPH lift pump and also the new fuel filter head and cat filter with adapter still havnet fixed the cut off at wot its like it runs out of fuel and then regains powet aafter a few seconds amd it does it every shift did clearing the taps on tcm work for u

 

[ecc_33]

Have you checked to see if your loosing fuel psi to the cp3 under load? Loosing rail pressure? A good log will tell you lots. Could also be injector return rate is really high. Fuel is lazy and will go to the least amount of resistance possible.