Ferrari Mailing List: Re: 85 308 GTSi QV Speedo / Odo Problem

[Charles Perry (charles]

We considered that, but a new sensor is around $500, so my friend didn’t want to waste the money. The sensor seems to test good, so we’ll see what the speedo does.

 

 

 

From: Clarence Romero Jr. <clyderomerof4 [at] gmail.com>
Sent: Tuesday, January 03, 2023 11:16 PM
To: Charles Perry <charles [at] carolinasound.com>
Cc: The FerrariList <ferrari [at] ferrarilist.com>
Subject: Re: [Ferrari] 85 308 GTSi QV Speedo / Odo Problem

 

Just buy a new sensor 

That’s the issue 99% of the time

When mine stopped working that was the problem 

 

 

     RF4-4EVR

Scars are Tattoos with better stories !

 

If you have no enemies, you have no character !

 

Clyde Romero    

 

 

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On Jan 3, 2023, at 8:28 PM, Charles Perry <charles [at] carolinasound.com> wrote:



Hi gang! I’m helping a friend repair his 308. His speedometer and odometer have both quit. He’s dug through FChat and Facebook groups for diagnostic help. The original consensus seemed to be the sending unit would be bad. So this weekend, we removed the sending unit and tested it per this document:

 

http://www.dinoplex.org/instruments/vegliaspeedosensor/?fbclid=IwAR3C6CZSPeCCVjtFFamIV5ypy371p5Rkn6PZiP_qtv74nJBh5jH3KrVoZW8

 

His is the Type 2 sensor in the document. Per the testing procedure, the sensor is good. It reads a hair over 4V with no metal in front of it, and bringing metal in close proximity to the coil makes the voltage jump to 8V.

 

So now we’re on to what’s next. Some people have said the needle/shaft on the speedo itself binds up and may need lubrication. Some have said the speedo board itself is bad. So some questions for you 308 gurus:

 

1) Is there anything else we should look at?

2) What’s the easiest way to get the instrument cluster out of the dash? I’ve read that if you pull out the smaller warning lights that there are screws behind them that will release the cluster and you can draw it out from the front without removing the steering wheel. Any additional information from those that have been there/done that?

3) If the speedo requires repair, what’s the best course? I know Palo Alto still rebuilds them. But you can also buy boards from Ricambi and some other suppliers. Any recommendations/warnings/suggestions?

 

Thanks!

 

-- charles

 

 

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