turbo lag and variation

[Waterloo]

Here is the Inline 5 Reader that most all of us use here, there is only one left, you better jump on this one! If you do manage to buy that one, you should have it by the end of the week. And that is a damn good price, and includes software.

http://www.ebay.com/itm/Data-Link-Adapte...SwceNZQ69I

And get with {Edited: Unilevers, Gearhead, or Mr. Hag}... 485 to 600? Dude, you will blow the head on that thing and God knows what other damage. Sorry, and I don't mean to scare you, and I understand you bought it like this, but I have been down this road, and it was not cheap. I have my factory 600hp 871 set to 485hp, it does fine, plenty of torque with the proper tune.

Also, how is the coolant level? Any signs of pressure in the coolant system? Loss of coolant? I ask because as I said, the head is the weak link on these CM-871's. They are disposable, not meant for reuse or remanufacturing. Cummins routinely runs out of them. Something to keep an eye on.

You will also need to download TeamViewer, https://www.teamviewer.com/en/download/windows/ Use this link, it is direct to the maker of the software, otherwise you will get a bunch of adware and other nasties. The FREE version is all you need. TeamViewer will allow {Edited: Unilevers or Gearhead} to use your laptop remotely, so that he can set you up on that laptop via internet and fix your motor.

You will need Windows 7 or greater and a USB connection in the laptop. {Edited: Unilevers or Gearhead} will need to know the CPL file on your truck. Look on the engine plate on your motor, the one with your engine serial number. The CPL number should be on that plate, write it down, you will need this.

Also, make sure the Delta P sensor is set up properly, and you can do this now... From the Rawze @m*m^2 package of a few years ago... This is for the CM-871 only as far as I know, which is the motor I have.

"Remove the Delta-P sensor and break away the center pin in its electrical connector, then re-install it/plug it back in. EGR delete or not, the engine will still try to protect this sensor. Removing the center pin from it ensures it reads zero all the time. This prevents silent derates that have been seen on some trucks, if the sensor itself were to go bad. The feedback from this sensor needs to be zero at all times, regardless of what type of delete you have."

You can watch the EGR Tuneup videos to find that Delta-P sensor. It is on the driver side center at the head. Here is the video, go to the 3:40 spot to see the sensor. https://www.youtube.com/watch?v=FhJxpyS5MpY

Also, like Nilao stated, it might be a good idea to drop the DPF and DOC can to make sure they have been properly hollowed out. If you do drop them, and I would, trust me, you will need a new gasket kit for the cans and exhaust. Two large gaskets and one small gasket for the inlet side. I hollowed mine right out, sounds good, not obnoxiously loud either. Honestly it is not that much louder than when the cans were intact. I have a weed burner too...


It sounds like Unilever already has a grasp of your situation, listen to him, he knows his stuff. As he has helped many of us on here, myself included. Good luck.