Did a post search but came up empty- (probably my error, if so please don't flame me) Yesterday driving in stop and go traffic in "manual automatic" mode my RPM gauge needle stuck at 2700. I then ran the RPM's up to about 3500, the needle moved up there (sluggisgly) and when I let off the gas it stuck at around 2200. It did this a couple of times but then seemed to go back to normal. Anyone else have this happen, and should I be worried about it? (Only have 5,000 miles on the beast)-
TIA-
TB

 

if you can reproduce it reliably, bring it in, if not I wouldnt give the dealer an excuse to rev your car to 3500RPMs trying to reproduce it.

 

Sounds like a plan. Thanks for the reply!
TB

 

Sounds like a plan. Thanks for the reply!
TB

 

That happened to me once. It froze at 3500rpm, but unstuck itself 20 minutes later.

Michael.

 

dang this happened to me yesterday.. its got stuck at about 2600.. i reved and everything and i didnt go down.. so i downshifted and stuff and later it went down. it was like that for 5 minutes.. it was weird!

 

I remember on some forum a couple of months ago seeing a problem like this with either the RPM's or the speedo.

Happened only with the roadster and several people reached the conclusion that it was caused by the sun coming in over the back of the car and shining directly on the instruments. They were guessing that there were some optics in there effected by the sun.

Sooooo... check it out, if it only happens when the sun is coming from behind and shining on the dash, you might have discovered the culprit.

As to what to do about it----- damfino.

 

not sure if the speedo and tach are cable driven...but the old cure was to detach the cable mechanism and spray some white lithium grease or any grease for that matter

 

I might be wrong, but I've notice that the only time I get a stuck TACH is when sun light is directly on the tachometer.

 

hrmm I don't have a roadster but it happened to me?!?!?

 

Add me to the list. Sunday, out for a drive along the Delaware going about 40 (2500 RPM'S) looked down and tach was "stuck", downshifted, hammered it ...nothing. was stuck for 30 minutes. I'm thinking have to see the dealership (sh#t). Then just as fast as is stoped working...it started working again and has been fine since............beats me.

PPW 04 ZR
semi stock

 

I have a ZR and this happened to me for the first time last week. I remembered reading about it on the forums, so I did what was recommended and covered the tach. After about 2 seconds, it started working again. Took my hand off; it got stuck again. Covered it; worked. Etc., etc. I was topless going east at 5pm. Just the right conditions for the sun to hit my guages "correctly."

I can't see how it could happen to coupes, though.

 

I've never had it happen - and here in Arizona - the days sometimes reach 110 or higher ( heat inside locked car has to be a BIT higher !! ) Have parked in the sun MANY times - including some days at work.