6
rpm stutter *PLEASE HELP!!!*
- Thread starter vdubgirl23
- Start date
Noize
Go Kart Champion
Saabstory
.:R32 OG Member # 002
I'm gonna toss out a guess:
As the engine speed is not actually stuttering, it is just the needle. These are no longer hard-wired mechanical gauges; everything is digital and run through the CECM.
So my guess is that this is simply digital interference from another nearby signal, mildly annoying, but harmless.
As the engine speed is not actually stuttering, it is just the needle. These are no longer hard-wired mechanical gauges; everything is digital and run through the CECM.
So my guess is that this is simply digital interference from another nearby signal, mildly annoying, but harmless.
Heartagram131
Go Kart Champion
VCDS would show the RPM so you could compare it with the dash RPM?
Could be the cruise control pedaling the throttle to maintain constant speed??
Could be the cruise control pedaling the throttle to maintain constant speed??
idriveastick
Ready to race!
Really? I don't know about that. Not saying you're wrong, or that I'm an expert, but those needles have a fair amount of torque the way they're designed. They should hold true no matter the road conditions. I mean, if the road conditions were really having that large of an effect on a NEEDLE, why isn't the camera shaking violently? Or some other vibrations, etc...
I think your theory, while the logic is there, is a little far-fetched. Nothing personal. :thumbsup:
The Fed
Old Guys Rule
Uh, what?! Did you ride alone and observe this "normal" condition yourself? If not, just remember this one rule - NEVER trust what a dealer service department says.
Baldeagle
Ready to race!
It looked like each time the tach needle jumped, it moved by about 100 rpm? Each jump of 100 rpm in 6th gear would cause your speed to jump 2-3 mph. That would be very noticeable. Could you feel the car change speed? Since your digital speedometer readout remained the same, my guess is that the car’s speed was not jumping around. Also, could you hear the engine change rpm as the needle jiggled? You should easily be able to hear a 100 rpm change in rpm.
Do you know anyone with a Scan Gauge or equivalent? If yes, connect it to your OBDII port and monitor your tach. If the Scan Gauge holds steady while the tach needle jumps, it might confirm a problem with the tach needle.
EMaster24
Ready to race!
I am in agreement. Sure feels like the needle is getting a jumpy signal
bimmer635csi
Ready to race!
Fight them on this. I had a similar situation with wastegate rattle. They took a car off the lot out, heard it on that car also, and said "oh, its normal, they all do that". But when I challenged that logic and took it to another dealer, that dealer knew the issue and had the TSB fix looked up even before I brought the car in to them.
Short summary: 2 wrongs are nothing more than both wrong.
torga
Autocross Champion
Bringing back from the dead, but hey, now I don't have to start a new thread.
Does anyone else see this on a daily basis? My car has done it since I've owned it (~6 months). Other than the RPM/tach needles getting seemingly jumpy signals, there are no adverse effects. The needle bounce does not correspond to any lurching or abnormal revs from the engine whatsoever - it drives very smoothly.
Just wondering if anyone else has experienced this and has a fix, or if this is just a minor annoyance/quirk I'll have to live with.
Does anyone else see this on a daily basis? My car has done it since I've owned it (~6 months). Other than the RPM/tach needles getting seemingly jumpy signals, there are no adverse effects. The needle bounce does not correspond to any lurching or abnormal revs from the engine whatsoever - it drives very smoothly.
Just wondering if anyone else has experienced this and has a fix, or if this is just a minor annoyance/quirk I'll have to live with.
Hedgehodge
Passed Driver's Ed
its obviously your car enjoying the music and jamming out with you 
I hope thats not carbon build up...yikes. Not sure, ignore it until it throws a light i guess. My car iirc did that when my motor had carbon build up on startup. My 2001 does that at idle /shrug
I hope thats not carbon build up...yikes. Not sure, ignore it until it throws a light i guess. My car iirc did that when my motor had carbon build up on startup. My 2001 does that at idle /shrug