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FerrariChat.com » Technical Q&A Archives » Archive through May 09, 2003 » Intermittent speedo problem « Previous Next »

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david handa (Davehanda)
Member
Username: Davehanda

Post Number: 701
Registered: 5-2001
Posted on Thursday, May 08, 2003 - 12:37 am:   

Speedo sender is on sale at our sponsor Sodacoms. Go to their site and check the sale items...at the bottom of the page. Not sure if it will also fit the 348 though...I would imagine it is different.
James H. (Jamesh)
Junior Member
Username: Jamesh

Post Number: 182
Registered: 5-2001
Posted on Wednesday, May 07, 2003 - 10:00 pm:   

My 84 Euro 308 has the exact same problem. Do they use the same sending unit and is it hard to replace.
When it was in Lake Forrest Sports Car for service several years ago, I told the service writer of the problem with the speedometer. They took out the speedo and sent it away to be tested and it came back with no problem found. You would think a dealership would have known to check the sending unit. GRRRRRRRR Paid to have the speedo removed and tested and still have the same problem. I HATE LAKE FORREST SPORTCARS!!!!!!!
"The Don" (Mlemus)
Advanced Member
Username: Mlemus

Post Number: 4468
Registered: 8-2002
Posted on Wednesday, May 07, 2003 - 10:29 am:   

I agree with Steve,

Time for a new unit. Ferrari's seem to need to have these replaced often.

M
Steve Magnusson (91tr)
Intermediate Member
Username: 91tr

Post Number: 1759
Registered: 1-2001
Posted on Wednesday, May 07, 2003 - 10:19 am:   

If your 348 uses the 116987 speed sensor I think you could try replacing it without regret (had similar symptoms on my TR solved by a fresh 116987). I'd guess that one of the leads at the speedo sensor should be +12V (but let me check that later) and the other output line would be some sort of pulsed signal (but being an "intermittent" problem it won't make a clear direct diagnosis easy).
philip (Fanatic1)
Junior Member
Username: Fanatic1

Post Number: 209
Registered: 2-2003
Posted on Wednesday, May 07, 2003 - 10:07 am:   

My speedo has always worked fine....lately, it's an intermittant problem, the speedo does not work at all.....I can be in the middle of a drive, shows 80mph then drops to 0 and stays there.......another day, stays at 0 all day, another day works for 10 minutes....doesn't for 20....works for five....etc.
I've searched the archives and I think it's probably a speedo sender....does this sound right?
its a 93 348 (electronic speedo?) is there a way to test anything on this?
thanks!

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