1992 348 starting ,miss fire issues

Do a search on 348 hot starting issues...

When mine had this problem, it seemed to go away when I disconnected the battery for a few minutes, then reconnected, started it, and let it idle without touching the throttle for 15 or 20 minutes to reset the ECUs...

Mike in Kuwait

 

You said the starter was rebuilt, but did they replace the solenoid? Sounds like that could be a potential issue.

You may want to ask a Moderator to move this to the 348/355 section... lots of very, very smart people there who know these cars inside and out.

Mike in Kuwait

 

"Rebuilt" starter doesn't mean fixed.

Better try that one again. Clean and tighten all your connections (particularly grounds).

Why are you running "very hot"? This sounds like a problem as well.

 

+1

Very sound advice.

Mike in Kuwait

 

Very common with these cars. If the starter was rebuilt I assume they replaced all of the copper contractors in the solenoid. In my case when I measured the voltage at the the starter solenoid it was low. This was of course after I rebuilt the starter so I looked elsewhere. Turned out to be too much voltage being dropped over the ignition switch itself and I was not even getting the click. A lot of guys have put a relay that lowers the current that has to flow through the switch. In your case you're getting the click so check both bullet connectors and give them a good twisting to seat them and see if the problem stops for a while.

 

If your starter motor always turns when the engine is cold/cool then it's probably a heat related issue. Could be too much engine heat transferring to the starter motor/solenoid. Stuff expands in one of these and now maybe too much physical resistance for the solenoid to pull forcefully against the starter motor contacts and make good contact.

Not sure what you mean by the engine running hot (if you mean fully warmed-up or running too hot). If it's running too hot and you fix that, your starter problem may very well disappear.

 

348s shouldn't misfire, and your 6500 rpm cap suggests either a clogged cat or an exhaust ecu cutting half of your engine power.

You just acquired this 348, yes?

 

What about other cars?

 

Where are you located? Does your 348 have "slow down" lights in the instrument cluster, and catalytic converters? With what we know so far, you could have any number of possible problems, including an alternator that isn't giving full output.

 

This thread is worth a read


http://www.clubscuderia.co.uk/forum/showthread.php?t=33224

 

I don't remember what year Ferrari moved the battery to the left front wheel well but, if you still have the bullet connectors I would start there. They are located under the air box, and next to the battery (if your battery is in the rear). If the connectors get a poor connection you won't have enough juice to crank the starter.

As for your misfire, have you gotten any check engine lights? You could have a bad spark plug, bad plug wires, or even a crank sensor that is going out.

 

Crud.

I just read that you're located in the UK, so your car is the Euro model and you won't have the button to pull the codes.

 

Ricambi has it, or you could rig a switch that you can keep depressed for a few seconds.