high pyro temp/low boost/weak engine brake

[ILfarmer89]

(09-24-2022 )Rawze Wrote:  

(09-24-2022 )ILfarmer89 Wrote:  ...
It does have an adjustable fuel pressure harness on it
...

You need to yank that fuel-pressure sensor fooling device off of it ASAP and throw it in the garbage can!!!!!.

The ISX CM570, CM870, CM871 model engine fuel pressure is 100% mechanical.. and the computer HAS ZERO CONTROL OF THE FUEL PRESSURES!!!.

THOSE FUEL FOOLING DEVICES ARE A SCAM.. And all they do if royally f#uck up the injection timing badly and fuel quantities into the cylinders, creating a ton of excessive internal engine friction, seriously shortening the engine life!!!.

They also destroy engine cylinder balancing and the ability for the engine to maintain a proper fuel-air-mix.

The engine computer can make whatever power/torque/efficiency trade-offs that someone desires ... PROPERLY and without shortening engine life.

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Unplug the egr valve and see if it gets a CEL light. If it does not, then take it to a dealers$ip and have the correct program flashed back into the engine. CM870 does not shut down if it has been de-mandated.. it will only have CEL light for whatever got unplugged. -= at least this way you can iron out all the problems and get it running right while the correct factory program is in it before moving onward.

I unplugged the egr valve and as I feared, the CEL light didn’t come on. Looks like it’s a trip to get correct program flashed into the ecm. Thanks for the help thus far and I’ll report back once that is done. Quick question tho, would it mess anything up in getting this lined out, if when I’m getting the ecm re-flashed, if I had them flash it to the 500hp program? I don’t want to cause anymore issues. Just a thought.