Cruise Control/Speedometer Issue

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Oct 1, 2006 | 12:05 PM

Dakota Slim

Thread Starter

Drifting

Joined: Nov 1999

Posts: 1,920

Likes: 84

From: Roanoke Virginia

Cruise Control/Speedometer Issue

My Cruise control has stopped working and my speedometer has recently started dropping to 0 when I floor the pedal. Comes back as soon as I let off. I recently had some ECM and TCM programming done but my tuner says it is not related to that. Anyone have any thoughts? Is it electrical or possibly another control module malfunction?

Oct 1, 2006 | 12:31 PM

VET4LES

Team Owner

Joined: Oct 2004

Posts: 27,420

Likes: 64

From: San Clemente CA

I'm sure the cruise control is not working due to the speedometer problem. In addition that's an unusual problem and I am also sure it's related to the progaming since the speedometer does not have a cable and is all electronic. Be careful when you take it to the dealer. They will know you had the tune and send you back to the tuner.

Last edited by VET4LES; Oct 1, 2006 at 01:58 PM.

Oct 1, 2006 | 12:54 PM

Wayne O

CF Senior Member

Joined: Feb 2006

Posts: 23,313

Likes: 25

From: Tucson Arizona

If you go to the dealership, make sure they do not re-flash the PCM. Unless it's locked, you'll lose your edit.

Oct 1, 2006 | 01:34 PM

gdawgg

Instructor

Joined: Jun 2005

Posts: 121

Likes: 0

From: DFW TX

Did the tuner try to fix the problem before telling you it had nothing to do with the programming? Good luck...hopefully the dealer or the tuner will be able to do something to help you out.

Oct 1, 2006 | 01:54 PM

shopdog

Race Director

Joined: Oct 2004

Posts: 10,089

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Quote:

Originally Posted by Dakota Slim

If it were an electrical problem, I'd expect it to show up when you hit a bump, not just when you floor the accelerator. Most likely it is something the tuner did. Flash it back to stock and see if that clears up the problem. If that doesn't fix it, monitor the OBD II data with a scan tool. If the scan tool reports zero speed when you accelerate, you have a defective TCM. If it doesn't, you have a defective IPM. But I bet reflashing to stock will cure it.