Cruise Control Issue

[CNCwell]

While driving this morning the TB developed an issue with the cruise control. It cruises fine but when it drops gears to compensate for a hill the cruise will kick off when the RPMs hit 2964. The weird thing is that when i hit resume on the cruise it will work just fine over 2964 RPMs. It seems to only happen after cruising. Any thoughts?

[The Roadie]

First such report I remember seeing. Cruise will also drop out for certain obdii codes. Maybe you have an intermittent misfire at high RPM under load? Can you check code history and look for intermittents?

[CNCwell]

First such report I remember seeing. Cruise will also drop out for certain obdii codes. Maybe you have an intermittent misfire at high RPM under load? Can you check code history and look for intermittents?

I will do that now. Luckily I now have the Torque app so I should be able to pull it from there.

[CNCwell]

No dice on the fault codes. The scan came back clean.

[navigator]

mine kicks out when towing my boat sometimes.
It seems to tow to the ramp fine but many times on the way home it won't work.

[CNCwell]

mine kicks out when towing my boat sometimes.
It seems to tow to the ramp fine but many times on the way home it won't work.

Do you think that has anything to do with the transmission? If I remember correctly doesn't the cruise take its queues from the transmission?

[bgwolfpack]

I've had mine kick-out also at high rpm. I haven't looked in the book to see why, but I do not think it is an issue, just seems like it should.

[The Roadie]

I think it can also kick out at full pedal travel, same as the AC compressor will cut out to give you more power because it assumes you are in a passing situation. The full commanded pedal travel algorithm might also be triggered by the cruise control commanded downshift with full "virtual" pedal travel.

Remember when cruise controls had huge vacuum-powered servo motors that pulled on a cable in parallel to the pedal cable, and you could feel the pedal move up and down? Stone knives and bear claws....

[CNCwell]

I think it can also kick out at full pedal travel, same as the AC compressor will cut out to give you more power because it assumes you are in a passing situation. The full commanded pedal travel algorithm might also be triggered by the cruise control commanded downshift with full "virtual" pedal travel.

Remember when cruise controls had huge vacuum-powered servo motors that pulled on a cable in parallel to the pedal cable, and you could feel the pedal move up and down? Stone knives and bear claws....

Ha Ha, Nice!

Thanks everyone. I will keep an eye on it and see what happens.

[dvanbramer88]

Remember when cruise controls had huge vacuum-powered servo motors that pulled on a cable in parallel to the pedal cable, and you could feel the pedal move up and down? Stone knives and bear claws....

You mean like mine? Minus the vacuum part. Haha.

[JCrayton99]

I had an issue with cruise for a few years (I seldom used it) and could never figure out what it was. It would cruise fine from anywhere from a few seconds to a few minutes. I couldnt narrow it down to anything that caused it to drop out. Then one day it was fixed? So I was never able to track it down and this was a waste of a post.

[KingBird]

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