Coasting
Thread Starter
Drifting
Joined: Dec 2012
Posts: 1,504
Likes: 73
From: Georgetown TX
Coasting
89 with auto. 3.07 gears
Does anyone know what to change in the ecu to allow my car to coast more freely when I let off gas. Right now when I use cruise control, it engages and disconnects so much it's not comfortable to use. I believe it's because the car starts to decelerate as soon as you get off the gas
Does anyone know what to change in the ecu to allow my car to coast more freely when I let off gas. Right now when I use cruise control, it engages and disconnects so much it's not comfortable to use. I believe it's because the car starts to decelerate as soon as you get off the gas
Last edited by mlm0; Mar 28, 2017 at 10:08 PM.
Safety Car
Joined: Sep 2001
Posts: 4,154
Likes: 553
From: Glenbeulah Wi
89 with auto. 3.07 gears
Does anyone know what to change in the ecu to allow my car to coast more freely when I let off gas. Right now when I use cruise control, it engages and disconnects so much it's not comfortable to use. I believe it's because the car starts to decelerate as soon as you get off the gas
Does anyone know what to change in the ecu to allow my car to coast more freely when I let off gas. Right now when I use cruise control, it engages and disconnects so much it's not comfortable to use. I believe it's because the car starts to decelerate as soon as you get off the gas
Last edited by bjankuski; Mar 28, 2017 at 10:22 PM.
Safety Car
Joined: Sep 2001
Posts: 4,154
Likes: 553
From: Glenbeulah Wi
See what the current settings are, if they are zero it means the torque converter is locked up solid with the engine when your foot is off the throttle and the car is coasting. This means that engine braking will slow the car down faster then you might expect or want. If you set the min load limit for converter lock higher then your off the throttle numbers the torque converter will unlock while coasting and have less engine braking and it will not slow down as fast. If you don't like how it works just put it back.
Thread Starter
Drifting
Joined: Dec 2012
Posts: 1,504
Likes: 73
From: Georgetown TX
See what the current settings are, if they are zero it means the torque converter is locked up solid with the engine when your foot is off the throttle and the car is coasting. This means that engine braking will slow the car down faster then you might expect or want. If you set the min load limit for converter lock higher then your off the throttle numbers the torque converter will unlock while coasting and have less engine braking and it will not slow down as fast. If you don't like how it works just put it back.
thanks. Now I think I understand it. Right now it's about 3 per cent, so I will set it higher to coast more
Thread Starter
Drifting
Joined: Dec 2012
Posts: 1,504
Likes: 73
From: Georgetown TX
ok after thinking about this, I was wrong, I don't understand it. Don't mean to be a pain in the ***, but!
i am using tuner pro rt, with $6E. To me, your first post and your second post seem to contradict each other. I'm sure it's me just not understanding it, but not sure weather to increase or decrease percent to make car coast more freely
thanks for taking the time to help me
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Safety Car
Joined: Sep 2001
Posts: 4,154
Likes: 553
From: Glenbeulah Wi
ok after thinking about this, I was wrong, I don't understand it. Don't mean to be a pain in the ***, but!
i am using tuner pro rt, with $6E. To me, your first post and your second post seem to contradict each other. I'm sure it's me just not understanding it, but not sure weather to increase or decrease percent to make car coast more freely
thanks for taking the time to help me
i am using tuner pro rt, with $6E. To me, your first post and your second post seem to contradict each other. I'm sure it's me just not understanding it, but not sure weather to increase or decrease percent to make car coast more freely
thanks for taking the time to help me
Melting Slicks
Joined: Sep 2008
Posts: 2,376
Likes: 111
From: Cherokee National Forest TN
The cruise in/out issue sounds to me like to much slack in the servo cable &/or poor vacuum to the servo.
Multiple holes for cable adjustment @ the servo.
TCC lock/unlock your call.
Multiple holes for cable adjustment @ the servo.
TCC lock/unlock your call.
Thread Starter
Drifting
Joined: Dec 2012
Posts: 1,504
Likes: 73
From: Georgetown TX
Safety Car
Joined: Sep 2001
Posts: 4,154
Likes: 553
From: Glenbeulah Wi
89 with auto. 3.07 gears
Does anyone know what to change in the ecu to allow my car to coast more freely when I let off gas. Right now when I use cruise control, it engages and disconnects so much it's not comfortable to use. I believe it's because the car starts to decelerate as soon as you get off the gas
Does anyone know what to change in the ecu to allow my car to coast more freely when I let off gas. Right now when I use cruise control, it engages and disconnects so much it's not comfortable to use. I believe it's because the car starts to decelerate as soon as you get off the gas
Thread Starter
Drifting
Joined: Dec 2012
Posts: 1,504
Likes: 73
From: Georgetown TX
stock
i think the cruse control works fine. The problem is that as soon as The cruse control gets car up to set speed, the control deactivates like it should, but car starts to slow down as in engine braking, causing the control to come back on right away. Trying to maintain a consistent speed with cruse control is jerky
have not played with ecu yet as suggested
i think the cruse control works fine. The problem is that as soon as The cruse control gets car up to set speed, the control deactivates like it should, but car starts to slow down as in engine braking, causing the control to come back on right away. Trying to maintain a consistent speed with cruse control is jerky
have not played with ecu yet as suggested
Last edited by mlm0; Mar 30, 2017 at 05:35 PM.
Racer
Joined: Sep 2007
Posts: 375
Likes: 18
From: Lawrenceville Georgia
This is just info for you, I have a 89 with the same engine,trans, and gear as you do. Mine is smooth with cruise on, no jerks at all.
As churchkey suggested, check vac lines, etc.
Hope this helps.
Joel
As churchkey suggested, check vac lines, etc.
Hope this helps.
Joel
Instructor
Joined: Oct 2015
Posts: 134
Likes: 6
From: Osceola WI
Check to make sure the cruise actuator can actually hold a vaccuum, i believe it should. The screws that hold it in the braket, if the got replaced with long ones or bigger ones, can cause a leak in the housing