CM871 poor power and fuel econ

[Grounded Pilot]

(07-17-2022 )Rawze Wrote:  

(07-17-2022 )Grounded Pilot Wrote:  ... What sensors are used to give the ecm its torque and HP readings?
...

There are no sensors that do that directly or indirectly.

Just about every engine sensor can effect how it performs. The most relevant usually being the exhaust gas (back-pressure) sensor, the IMAP sensor, etc. etc.

Your descriptions point towards some kind of severe neglect of the engine sensors and systems in its past. This is usually coupled with a lot of mechanical neglect too.

also might want to do an overhead valve adjustment and injector leak tests too...
http://rawze.com/forums/showthread.php?t...8#pid67948

Yes sir, this thing has seen a hard life. Its taken the better part of a year since my boss bought it to get to this point with it. Replaced all 6 injectors, all fueling/timing actuators, exhaust gas sensor, map sensor, cam, turbo, and figured out the E,G,R system was demandated (didn't know that when it was purchased) along with the D,P,F system (did know that one) and both were done poorly from the looks of it.

It ran great to start with. Good power, decent fuel mileage but started losing power/fuel mileage right before the cam went bad. Then it has been a cascade of issues since and have gotten it back to respectable power and pretty good fuel mileage. But still not right. Like sometimes it will act like its fully loaded climbing a hill empty.