Crazy Speedo

**speedracer9k** · 07-13-2008 10:48 PM

Since I went stage 3, my speedometer and gas gauge have been going crazy. They both fluctuate and dont give anywhere near accurate readings. I am also getting throttle cut at about 5,000 rpm intermittently. I replaced the Vehicle Speed Sensor today and that did nothing. The car's original ECU was a T-Box and i'm now using an M-box with stage 3 software. Before I start searching for a pinched VSS wire, has anyone ever experienced this isuue? Thanks in advance.

**Jung** · 07-13-2008 11:29 PM

once or twice, my speedo read 10mph when stopped, and kept at 10mph difference throughout that drive. my speedo took a shit on me in my maxima once. because of an electric short.
This has never happened to me since, so i consider it an anomaly. knock on wood. hope you figure out what's happening. The speedo is pretty important!

**speedracer9k** · 07-14-2008 11:07 AM

any advice anyone?

**highPSI-S4** · 07-14-2008 11:17 AM

did you recode the cluster after the swap of the ECU's. As for the gas reading i would say it's the fuel pressure sender that went bad.

**jwk2w** · 07-14-2008 12:14 PM

I just bought a 2000 s4 and I had to drive 1100 mile home from getting it. On my way home in Nashville, TN I hit a back rain strom and my speedometer did the same thing but is a couple hours is went back to normal.

**speedracer9k** · 07-14-2008 12:58 PM

No, I wasn't aware that I needed to recode the ecu, is that done thru Vag software?

**beans912** · 07-14-2008 03:51 PM

Originally Posted by jwk2w

I just bought a 2000 s4 and I had to drive 1100 mile home from getting it. On my way home in Nashville, TN I hit a back rain strom and my speedometer did the same thing but is a couple hours is went back to normal.

Haha that happens to me too, after i wash it or while it rains my speedo doesn't work, my odo doesn't go up and my gas gauge bounces around.

**Rated S** · 07-14-2008 04:48 PM

http://s4wiki.com/wiki/Cluster_recode

**speedracer9k** · 07-14-2008 09:43 PM

Thanks, gonna try this once I can get my laptop to connect.

**audi_s5** · 11-08-2009 01:51 PM

My allroad speedometer does same thing after car wash/heavy rain.

Anyone know what the cause is? Is it VSS? or something else??

**MattyJ** · 11-08-2009 05:48 PM

I have run into this multiple times working at the dealership. The only fix I know is run new wires from the speed sensor to the cluster. Its no small job, but I can almost guarantee that's the issue.