DIY PROM Do It Yourself PROM chip burning help. No PROM begging. No PROMs for sale. No commercial exchange. Not a referral service.

Using apx file help

Old 04-14-2017, 02:43 AM
  #1  
Member

Thread Starter
 
knightinblackar's Avatar
 
Join Date: May 2006
Location: UK
Posts: 264
Likes: 0
Received 0 Likes on 0 Posts
Car: 1984 Firebird S/E
Engine: 1985 2.8 MPFI
Transmission: 1985 T5 5 speed manual
Axle/Gears: 3.42/4.03
Using apx file help

hey eberyone,

I'm using the 1F$ apx file, I think, for my 2.8 V6 as recommended by the guy who made the aldl to USB cable for me. My question is, due to this being for a V8 motor will it mess up the tach reading on the computer in tuner pro or winaldl. The reading on my gauge and on the laptop are like 2000 rpm different with the gauge being much higher than the tach on the laptop.

Thanks in advance
Rich
Old 04-14-2017, 08:50 AM
  #2  
Moderator

iTrader: (1)
 
RBob's Avatar
 
Join Date: Mar 2002
Location: Chasing Electrons
Posts: 18,399
Likes: 0
Received 215 Likes on 201 Posts
Car: check
Engine: check
Transmission: check
Re: Using apx file help

Trust the scan tool data. The RPM conversion in the ALDL stream is cylinder count neutral.

Hit the electronics board here for how to fix the dash tach.

RBob.
Old 04-14-2017, 08:57 AM
  #3  
Member

Thread Starter
 
knightinblackar's Avatar
 
Join Date: May 2006
Location: UK
Posts: 264
Likes: 0
Received 0 Likes on 0 Posts
Car: 1984 Firebird S/E
Engine: 1985 2.8 MPFI
Transmission: 1985 T5 5 speed manual
Axle/Gears: 3.42/4.03
Re: Using apx file help

Originally Posted by RBob
Trust the scan tool data. The RPM conversion in the ALDL stream is cylinder count neutral.

Hit the electronics board here for how to fix the dash tach.

RBob.
Thanks RBob. I honestly didn't think the engine sounded like the revs it was displaying. It's ok about the repair tho as I have an external tacho going in. I read about these tachs going a little crazy hence why I asked. Thank you so much!

So so basically you're saying it doesn't matter whether it's connected to V6 or V8 it'll always display the correct revs?
Old 04-14-2017, 06:30 PM
  #4  
Moderator

iTrader: (1)
 
RBob's Avatar
 
Join Date: Mar 2002
Location: Chasing Electrons
Posts: 18,399
Likes: 0
Received 215 Likes on 201 Posts
Car: check
Engine: check
Transmission: check
Re: Using apx file help

Originally Posted by knightinblackar
Thanks RBob. I honestly didn't think the engine sounded like the revs it was displaying. It's ok about the repair tho as I have an external tacho going in. I read about these tachs going a little crazy hence why I asked. Thank you so much!

So so basically you're saying it doesn't matter whether it's connected to V6 or V8 it'll always display the correct revs?
Yes to the correct RPM versus V6 or V8, for at least this ECM mask (along with others). There are masks that also send the DRP count, which is cylinder count specific.

RBob.
Old 04-14-2017, 06:34 PM
  #5  
Member

Thread Starter
 
knightinblackar's Avatar
 
Join Date: May 2006
Location: UK
Posts: 264
Likes: 0
Received 0 Likes on 0 Posts
Car: 1984 Firebird S/E
Engine: 1985 2.8 MPFI
Transmission: 1985 T5 5 speed manual
Axle/Gears: 3.42/4.03
Re: Using apx file help

Thanks RBob,

i also confirmed it with my extrnal tach. It reads what the laptop reads so I now absolutely know it's my dash tach that is wildly out!

Thanks for for all your help!


Thread Tools
Search this Thread

All times are GMT -5. The time now is 03:55 AM.