[mottati]

something is not right with the car. THe speed limit function on the obc has nothing to do with the actual top speed of the car, it simply sets off a "gong" at whatever speed you have set to let you know you have exceeded your set limit. Must be something else going on.
Mike

 

[dmz]

Can you tell us what tire size are you running front and rear? This sounds like a tire OD mismatch problem where the DSC kicks in when it senses the rear tires turning faster than the fronts. Have you tried the test with DSC off?

 

[SeanMD]

Can you tell us what tire size are you running front and rear? This sounds like a tire OD mismatch problem where the DSC kicks in when it senses the rear tires turning faster than the fronts. Have you tried the test with DSC off?

Tires/rims are OEM sizes so I don't believe that should interfere, though admitedly I have not tried with the DSC or the wheel control off (either one). Would either of those have ever been known to affect the fuel maps after being triggered in a case like this?

 

[mottati]

Can you tell us what tire size are you running front and rear? This sounds like a tire OD mismatch problem where the DSC kicks in when it senses the rear tires turning faster than the fronts. Have you tried the test with DSC off?

good call, i was thinking about that too... kind of like running on the dyno with the dsc fuses in. Maybe there's an abs sensor problem.
mike

 

[SeanMD]

Thanks much for the suggestions, I'll try the DSC next time to see if that is the source of the problem. Though in the case that it's not, what would be a good starting point for diagnosing if it is a sensor or is that something that I would want to have the techs hook up to find out?

Many thanks for the responses

Mike: as far as the dyno goes, if I were to happen to be going soon to hook the beast up for a baseline, what would I need to make sure was prepped prior to making the runs?

 

[mottati]

Mike: as far as the dyno goes, if I were to happen to be going soon to hook the beast up for a baseline, what would I need to make sure was prepped prior to making the runs?

I'd suggest a search to verify this, but i think you want to remove fuses 17 and 30 to disable the dsc for the dyno.

If there were an abs sensor issue, i'd think you'd have an abs light.

As for the original problem, does it matter what gear you're in?
Mike

 

[SeanMD]

I'd suggest a search to verify this, but i think you want to remove fuses 17 and 30 to disable the dsc for the dyno.

If there were an abs sensor issue, i'd think you'd have an abs light.

As for the original problem, does it matter what gear you're in?
Mike

it was in 4th in all instances, rpms were not anywhere near redline. I can do some more testing to determing if it the gearing has a part to play in it (both with and w/o DSC enabled)

 

[SeanMD]

same results no matter what gear I'm in.