Air fuel control derate?

[Rawze]

(06-04-2017 )Rockycoon75 Wrote:  Good morning beautiful I love you When it derates the boost stays around 5-10 when it clears it will go to 33ish. When running correct it was running around 38. Pyrometer runs around 7 usually but now that this has started it's pushing 8. I went to Albuquerque last week and I had to back out of it because it got to 9 and still climbing.

It did this a couple of times in the past but only for a second. Now it's happening quite often.

Don't have mechanical guages. I don't think mine is going that high at 1800 but will check it again shortly

Could be turbo related, could be a air-air leak, could be imap sensor or other sensor starting to go bad. could be a lot of things.

BTW: It is quite normal to get a fuel derate message for a few moments in the engine state parameter during hard acceleration. This is because the engine is limiting fuel while the turbo catches up to itself and is for ensuring there is no black smoke. Once it catches back up to itself, it should change. For example, if the accelerator pedal is on the floor, it will change to "max throttle" after it catches up again.

What is NOT normal is low boost levels and excess hesitation. Sounds like the engine is having some kind of issue like stated above.