Question: Allison defueling tech question - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
Home Forum Market Place Garage Tuning Library DTC Tool Register Vendors
Go Back   Diesel Place : Chevrolet and GMC Diesel Truck Forums > GM Transmissions > Allison OEM
Register FAQ Forum Rules My Replies My Threads Advertise

Allison OEM Discuss repairing & maintaining an OEM Allison automatic transmission.


DieselPlace.com is the premier Duramax Diesel Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools
Old 08-30-2019, 02:49 PM   #1 (permalink)
mittens
High Compression
 
mittens's Avatar
 
Join Date: Jun 2019
Location: Huntsville, AL
Posts: 28
iTrader Score: 0 reviews

Allison defueling tech question

So when the Alison calls for a defueled shift. what does the ECU do?


I ask this cause on my 1-2 and 2 lock up I see my desired fuel rail pressure and actual fuel rail pressures separate. then come back in other gears.


so then I tried 2 and 3rd and 4th, locked up, and making a pull in each gear, and the Cp3 can keep up with full rpms, and boost and engine load.. so that tells me the fuel delivery is not a problem. but something is telling it to de fuel.


but if in the tune it would be the desired FRP.. so I would see my data logs showing it wanted less and got less.


SO when the TCM calls for less fuel, would it show in the Desired or only actual?

__________________
2007.5 LMM LTZ, lifted 6" on 22x12s and 35s, AMP Steps, DSP5, 5" MBRP down pipe back - (strait pipe) dumped & deleted, Nictain Cat Fuel Filter swap, Edge CST2 Monitor, W/EGT), ATS rear diff cover.

2007 C6 Z06, 754RWHP (Heads & Cam 427, Procharger @ 7lbs+meth)
Offline  
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Diesel Place : Chevrolet and GMC Diesel Truck Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

PLEASE READ! You must check your email inbox for the confirmation link to complete registration. Please check your spam box if you do not see the email in your inbox.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Insurance
Please select your insurance company (Optional)

Log-in



Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 08:53 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Shoutbox provided by vBShout v6.2.1 (Lite) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
© AutoGuide