Wrong RPM?

Tachs can go bad. No need to worry about redlining without a tach if your speedo is correct. The owners manual states maximum speed in each gear. Just stay below that speed for a max shift point until you resolve the tach issue.

 

funny I have the exact same problem with my 87 328GTS except my tack won't go over 2,000rpm..I asked Framk over at FOO when the FCA had their tech session event last month and he said its 95% that the tach has got to be replaced and 5% that there could be a loose connection to the tach itself....I really can't be bothered looking into it myself as the car runs great and I was raised on driving stick cars and hardly ever look down to my tach will driving

 

If you are handy/do-it-yourselfer type....have a look here as I imagine the tach removal in a 328 is probably not any more difficult than a Mondi....


http://www.ferrarichat.com/forum/showthread.php?t=252100&highlight=tach

Brock

 

If it is reading 50% (verify that with an external tach) check what they did to the ignition system. If it has electronic aftermarket, then that is the reason. some aftermarket ones need a pulse doubler or similar tach modification.

Gerrit

 

Hi Eric
Post some good photos of the LH side of engine bay. that will spark a flurry of comments about whether it is original or not

Gerrit
http://dino308gt4.com

 

Tachs with 3.2 motors go bad all the time. It is one of the very few items on 328's that are universally troublesome. They can be rebuilt. Do a search on the subject and find places to send it.

Dave

 

Or, you can easily fix it yourself and save the $200 and shipping/waiting hassles....:

http://www.ferrarichat.com/forum/showthread.php?t=262520

 

My tach did exactly the same thing when I bought the car. I could have had it rebuilt, but since the numbers on the dial had also faded, I elected to replace it entirely, and I got a real good deal on a new tach from Ricambi.

 

FoO had a tech session last month?

 

Be prepared for a relapse. Mine did the same thing. I've had two 328's and both eventually needed tach rebuilds. I sent them to Palo Alto speedometer for repairs and am very pleased with their work. http://paspeedo.com/

 

Needs a rebuild. Of course it might work off and on for years. (My Dodge 600ES convertible with a dreaded digital dash started off-and-on reading 0 on the speedo in 1992 and it worked that way until 2008 when I finally elected to replace the $50 speed sensor. Works flawlessly now.)