Buick GL8 acceleration problem (solved) - Buick Encore Forums - EncoreOwners.com
 1Likes
  • 1 Post By Tony Back
 
LinkBack Thread Tools
post #1 of 1 (permalink) Old 03-26-2015, 04:56 AM Thread Starter
Junior Member
 
Join Date: Sep 2014
Posts: 4
Buick GL8 acceleration problem (solved)

I repaired a Buick GL8 that could not accelerate while driving last week. According to the car owner, the Buick was equipped with a 3.0 engine and a 4T65E automatic transmission, with 120,000 km on it.

The owner told me that it could not speed up when he was driving the car, which made it extremely difficult to climb up a slope. Every time he came to an upslope, he had to press the accelerator pedal all the way to push the car up the slope.

After I received the car, I first started to diagnose the problem by using GM Tech 2 diagnostic tool. Test result from the OBD2 tool showed that ther automatic transmission of the car was broken, so that the vehicle could not go faster than 130km/h.

Then I troubleshoot the automatic transmission control system with the GM Tech2 Scanner again, and pulled two error codes: P0756 and P0758. The former means 2-3 shift solenoid B circuit fault, while the latter means 2-3 shift solenoid B electrical fault.

After troubleshooting the problem, I went a test drive and checked the data flow while driving. Then I pulled out the plug connecting the automotive transmission, and tested the resistance of 2-3 shift solenoid valve, which turned out to be infinite. When I tested the resistance with other solenoid valves, their numbers were normal.
pajgps likes this.
Tony Back is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Buick Encore Forums - EncoreOwners.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

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:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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

 
For the best viewing experience please update your browser to Google Chrome