Engine/Transmission (1998.5 - 2002) 18-11-99

[onesloryd]

I would like to get the opinion of everyone that has had this. My truck is CA vehicle and was wondering if this will help the performance.

 

[onesloryd]

no opinions!

I have done a search but most of the post are old.

 

[Bob Wagner]

Slow acceleration or lack of power while towing or hauling a heavy load.

This information applies to vehicles equipped with a 5. 9L - 24V diesel engine built before engine serial number 56587297 with a date of engine manufacture of May 5, 1999. This information is available on the engine data plate, which is located on the left side of the engine, affixed to the gear housing. There may be a condition of low power or slow acceleration when towing or when hauling a heavy load. This software change, to the Cummins CM551 diesel engine controller, will increase engine torque. Some 1998 BR vehicles equipped with a 5. 9L - 24V diesel engine may already have the latest software revision. Verify that the ECM is at calibration level 98T17 (p/n’s 333034303J / 333035303J / 333036303J / 333037303J). If the calibration level is 98T17, then this TSB does not apply and further powertrain diagnosis may be required. This bulletin involves selectively erasing and reprogramming the Cummins CM551 Engine Control Module (ECM) with new software (calibration changes 98Cal T17 and 99CalT8B). There is no change to the JTEC PCM software.







Does your truck fall within the serial number range?

 

[onesloryd]

Thanks for the reply Bob.

Since I have to have the truck at the dealer I was wondering if I should have that done or leave well enough alone.

 

[big barney]

If your truck runs good don't touch it. I had this reflash done and lost about two mpg. On top of that it lost all of its low end power.

 

[onesloryd]

big barney,

Thanks I guess I will leave well enough alone.

 

[John Berger]

I had the re-flash done in the summer of 1999, six months after I bought the truck. It made a difference in the smoothness of the power band from 1400 through 2200 rpm. Much more consistent throughout instead of a surge at 1600 or so.

 

[onesloryd]

John,

Thanks for the reply, now one person has had bad luck with this and the other has had good. I was just trying to get and idea of how many people had good or bad luck from this reflash, and I would appreciate as many opinions as possible.

Thanks

Matt

 

[Challenger-II]

I had it done on my '99 and felt that their was a definate improvement. Especially powering up a big hill! Good luck