factory defuel settings

Fordtrucks · May 9, 2014

What temps and pressures would the computer defuel a factory engine?

sootie · May 9, 2014

that is tough to explain.

the pcm reacts to a correlation of data between multiple sensors as well as driver input.

the same result (defueling etc) can be caused many different ways, not necessarily a set value of a said parameter.

Fordtrucks · May 9, 2014

Well we built a 6.4 for a guy, all stock with a Minimax. One of his employees hooked a 40,000 lb goose neck to it and was runnin 96 mile an hr, said the computer when the motor locked up. Pulled apart and the piston melted over the rod. Just curious where to set the de fuels so that don't happen again..

Radioflyer · May 9, 2014

Wow, that guy was workin that motor pretty hard.

Csilva187 · May 9, 2014

I think the driver was the problem on this one???

Edit-40,000lbs? They make semis for that.

johnp115 · May 9, 2014

Sounds like he was trying to blow it up lol

Radioflyer · May 9, 2014

I know on the mini you can set limits with the egt's on the older ones (and I believe rpm). Not sure about after the update. Haven't fiddled with a mini for a long time, you can set speed limiters to have it defuel iirc.

Fordtrucks · May 9, 2014

Yeah probably do that. Set boost at 30, EGTs at 1400, speed at 75.. Should do it..

Radioflyer · May 9, 2014

Fordtrucks said:
Yeah probably do that. Set boost at 30, EGTs at 1400, speed at 75.. Should do it..

LOL be like like hitting a brick wall when he guy goes to stop on it again. LMAO

sootie · May 9, 2014

is it only one cylinder? maybe an injector hung...

B585Ford · May 9, 2014

The old version MM didn't truly defuel, it just went to the next lowest setting. If it was on "tow" and hit a defuel parameter, it would drop to "stock" and then just obey the stock defuel untilnitnwent under nthe defuel parameter.