Drivability problem
Question:
Thanks Guys — Tips, Tweaks, Help Forum Computers & Kits http://www.acon-pchelp.com
– Hide quoted text — Show quoted text -> My ‘87 K5 has suddenly developed an extreme over rich condition when it > reaches proper running temp. It showed a code 24 which indicates the vehicle > speed sensor. This doesn’t seem likely to > be causing the problem. This started shortly after having to jump start the > truck. The truck starts fine, but after warming up is starts running very > rough and often stalls, much like a sunken float would do in a carbureted > engine. > I have just disconnected the battery to reset the codes, and while I wait I > thought I would throw this out to the group for any ideas. > TIA. > JR > — > Tips, Tweaks, Help Forum > Computers & Kits > http://www.acon-pchelp.com
Response:
I had a similar problem with a GMC 5L truck and the problem was rapidly identify when I promptly disconnect the temperature sensor while the motor began to run roughly. The engine then runs with preset level instead of with the actual motor temperature and stop running roughly. This point out the sensor which has been replace to fix the problem . Good luck, Mario – Hide quoted text — Show quoted text -> My ‘87 K5 has suddenly developed an extreme over rich condition when it > reaches proper running temp. It showed a code 24 which indicates the vehicle > speed sensor. This doesn’t seem likely to > be causing the problem. This started shortly after having to jump start the > truck. The truck starts fine, but after warming up is starts running very > rough and often stalls, much like a sunken float would do in a carbureted > engine. > I have just disconnected the battery to reset the codes, and while I wait I > thought I would throw this out to the group for any ideas. > TIA. > JR > — > Tips, Tweaks, Help Forum > Computers & Kits > http://www.acon-pchelp.com
Response:
My ‘87 K5 has suddenly developed an extreme over rich condition when it reaches proper running temp. It showed a code 24 which indicates the vehicle speed sensor. This doesn’t seem likely to be causing the problem. This started shortly after having to jump start the truck. The truck starts fine, but after warming up is starts running very rough and often stalls, much like a sunken float would do in a carbureted engine. I have just disconnected the battery to reset the codes, and while I wait I thought I would throw this out to the group for any ideas. TIA. JR — Tips, Tweaks, Help Forum Computers & Kits http://www.acon-pchelp.com
Response:
Two things. 1) Check the CTS. If it’s bad the ECM will think the engine is cold after it’s warmed up… hence the over rich condition. 2) The other possibility is that the ECM was damaged during the jump start. This is more common than you might think. Dean – Hide quoted text — Show quoted text – >My ‘87 K5 has suddenly developed an extreme over rich condition when it >reaches proper running temp. It showed a code 24 which indicates the vehicle >speed sensor. This doesn’t seem likely to >be causing the problem. This started shortly after having to jump start the >truck. The truck starts fine, but after warming up is starts running very >rough and often stalls, much like a sunken float would do in a carbureted >engine. > I have just disconnected the battery to reset the codes, and while I wait I >thought I would throw this out to the group for any ideas. > TIA. > JR >– >Tips, Tweaks, Help Forum >Computers & Kits >http://www.acon-pchelp.com
