PCM Code

X JBM X · #1 Sat, May 22nd, 2010, 10:11 PM

So I'll be ordering this chip within the next couple days...

And a HUGE thanks to Cody for answering ALL MY QUESTIONS over the phone on Friday!!

Anyway, I went to the order form, and saw where I should input the code for my PCM, which is also something Cody mentioned to me over the phone (still fairly new to diesels)

So earlier today, I went out and went on a scavenger hunt for this code. I couldn't find it on the side of the PCM (yes, I most definitely located the PCM - 1" x 5" with 1 10mm bolt) and I couldn't see anything with a mirror and a flashlight.

So, I pulled it out. Unhooked the batteries, and then unbolted the PCM, turned it a couple times to take a better look. There is for certain NO STICKER on my PCM. There is, however, what looks like sharpie writing on the side.

The sharpie writing looks like it says 7214, although it was upside down, and whoever wrote it had terrible handwriting.

Is the PCM code crucial to getting me a tune???

What do I do next?!?!?

Thanks!

***cleatus12r*** · #2 Sat, May 22nd, 2010, 10:16 PM

Well the RIGHT way would be to actually have the code read off of the PCM binary....but that takes shipping the PCM back and forth or taking the truck to a shop that has a scan tool capable of reading the PCM code.

The other way is to guess.

What year and transmission?

X JBM X · #3 Sat, May 22nd, 2010, 10:19 PM

It's a 99.5, so it's got the late '99 engine, and early '99 suspension - build date of 02/99

Don't remember the trans. code, I'm pretty sure it's not the e4od tho...R4100 maybe?

EDIT: I'll take a look under the truck today and figure out what Trans it is.

X JBM X · #4 Tue, May 25th, 2010, 04:18 PM

BUMP! I want to order but won't have time to get to a code reader as soon as I'd like.

Canister · #5 Wed, May 26th, 2010, 02:27 AM

I have a 99.5 w/ a build date of 3/99 and my PCM code is NVK3, if it helps?

X JBM X · #6 Wed, May 26th, 2010, 07:56 AM

I appreciate that...I'm not sure it helps any though...

I may just wait until I can have the code read. That way I have a 100% for sure answer.

X JBM X · #7 Sat, May 29th, 2010, 02:50 PM

Ugh. Took the PCM out of the truck, and read the code. Order form sent in!!

hayjayhorses · #8 Sat, June 5th, 2010, 01:07 AM

did you get your chip yet?

X JBM X · #9 Sat, June 5th, 2010, 07:13 AM

Yep, got the chip and installed it yesterday before my 300 mile road trip.

The power is amazing!

The shifting under heavier throttle is awesome, but under light throttle not so much. It seems to be "over-clutching" - if you think about it like a manual, in between gears, if you give the truck too much throttle and then let the clutch out it does that forward buck before slowing down to catch up with itself.

I'm assuming that's not normal, but could someone please confirm that? It happens in both 80dd and 120r.

***cleatus12r*** · #10 Sat, June 5th, 2010, 10:20 AM

Which shift does it occur in?

I know your order form said that there weren't any transmission modifications but are you sure? Could a previous owner have done something to it?

The tunes you have are very similar to all of the PMT1 tunes that Bill has put out for quite a few months (and it's the most-used 7.3L platform we sell). I have looked at the programs and can find nothing askew with them.

Which shift (1-2, 2-3, 3TCC apply, or 3-4)? I'm wondering if you are feeling the 3rd gear torque converter clutch apply at approximately 35 MPH. Your NVK2 didn't do that under normal driving.