[Michelle]

I`m the one who wrote in "HELP MY SPEEDOMETOR HAS A MIND OF IT'S OWN".

Tonight the strangest thing happened with my 2005 G6.

I was in a parking lot going about 10kms, when the car reved itself and jerked forward.

I went from 40114km to 41114km on my car.

What the heck is going on with this car?

Would a computer re-set help? or am I just having engine problems already.

Let me mention, Im also having the rough start on cold start. - Yet every time I take it in to a dealer, apparently the car doesn't do it for them. So they will NOT do anything to fix it according to the bullitin untill it does it for them.

Any ideas out there?

 

[jetmech_5]

Have you had your car exorcism? It sounds like it is possessed by the devil.

Really I looked on all data for some symptoms but could not find any.

Do you have a check engine light that has come on?

You may try disconnecting your battery for a few minutes and then reconnecting it. Turn off your radio before you do it though.

Let me know what happens.

 

[Michelle]

No check engine light or any sensors have come up.

I'll try the battery tommoro. Wish me luck.
I'll let you know.

Keep me posted if you come up with anything.
Thanks.

 

[mjgonegm]

Your car is evil, the only thing i could think of about the revving would be the throttle body acting up. Since it's drive by wire and all, but there failsafes to keep that from happening..

Any water damge? Is your 6 a swimmer or a floater?

 

[jetmech_5]

Good point, could have moisture in the plug or something. Potentiometer in the throttle position sensor may have a bad spot on it. That is easy to check if you have an OHM meter.

Swimmer or floater...really?

 

[jetmech_5]

Your odometer that records mileage or KM jumped 1000 KM..correct?

That sounds like an ECM problem. You had mentioned "rough start on cold start"...do you mean the starter hangs or stays on after key is released from start position? If so that MAY require an ECM flash by the dealer and there is a service bulletin on it. Bulletin No.: 03-06-03-001D. the service bulltin says this is normal condition but there are several people on this board who had a ECM flash that corrected the problem.

Never heard of the odometer jumping 1000KM or miles so I cant help you there.

Note the odometer reading before you disconnect the battery and see if it's the same after you reconnect it.

 

[mjgonegm]

Also Jet did you forget THE BCM records the mileage, Not the ecu and IIRC it controls the starter solenid too, which would explain that.

If ti is the BCM It's either

Water Damage
Simply a busted BCM
Pinched wire

 

[jetmech_5]

ya the body control module thingy. Thanks for the correction.

Wonder if the plug is loose on that? If the car is used some one may have been jacking around with that.

 

[mjgonegm]

ya the body control module thingy. Thanks for the correction.

Wonder if the plug is loose on that? If the car is used some one may have been jacking around with that.

Don't Worry Between the BCM, PCM and THE ECU I get confused some times too lol

It might Just be your cluster Michelle or a wire short. You really need to take it in to the dealer messing with that could provoke the anti theft System

 

[Michelle]

Well I took my car in to the dealer and as for the dash the bullitin above IS the fix. But apparantly it doesn't always work and it's not worth dishing out for. (More than one mechanic advised not bothering on this). As for my speedometor, It WAS my CLUSTER. It needs to be replaced. All the guages were going funny. Thank god I kept track of my milage!

Thanks again to all!

 

[mjgonegm]

Well I took my car in to the dealer and as for the dash the bullitin above IS the fix. But apparantly it doesn't always work and it's not worth dishing out for. (More than one mechanic advised not bothering on this). As for my speedometor, It WAS my CLUSTER. It needs to be replaced. All the guages were going funny. Thank god I kept track of my milage!

Thanks again to all!

I knew it!!!

Same issues on the malibus the cluster would go wacky a. becuase it was bad or B. becasues the harness was chaffing.

The new camaros two but there was a simple fix the neddles were just on to tight.