When the car is cold, the rev limiter in any gear kicks in at 5,000 revs or so. Only after the oil temperature reaches 82', will she rev towards 7,000rpm. Is this normal? If not, what could it be? We already looked for an external rev limiter around the ECU, etc, but there's nothing installed that we can see. Both of the Ferrari specialists that I use, told me that they never known of this, but also never paid attention to this before I told them about my car.
I have never experienced this. My car will rev all the way at any temperature, but only a fool would take it above 4000 rpm when cool.
+1, read the manual! Never rev above 4k until oil is at operating temperature...this holds true with any car.
Fools taking potshots but shooting themselves in their smart ass foot. How do yo know that your car revves to limit at any temperature? So you're a fool by going above 4,000rpm when cold? Trying to preach and sound smart - not! The car doesn't move until the water temp reaches 80'. For the oil temp to reach 82', a 20min+ drive is required. Question was asked because two local Ferrari specialists have never seen a 348 impose a rev limit according to oil temp.
I wouldn't be asking for any more answers with that attitude. BTW...we here in America use the Farenhiet scale.
The Motronic 2.5 and Motronic 2.7 computer software from Ferrari for the 348 does *not* adjust the rev limit based on oil temp. Do you have stock chips in your Motronic engine computers, or do you have an aftermarket engine management system?
That is what I thought. Everything looks stock, according to the specialists, but that doesn't mean that it is. How can it be checked?
The rev limiter is supposed to kick in at 7700 rpm. Does your engine ever rev that high when warm? I'm wondering if maybe you have a bad rpm sensor on the nose of the crank. I don't think I've ever heard of a problem with the rev limiter, it should be a simple function of the Motronic ECU, assuming that it is given a proper signal from the sensor. You could try swapping the ECU's from side to side, they're the same. Also, is it possible that the vacuum hoses are routed wrong on the intake manifold? Maybe the intake compensation valve isn't opening when the engine is cold.
For the sake of the Brotherhood...............I went outside and started my dead cold engine and held it FLAT to the floor to check this out. Yes, the car went straight to the rev limiter 7800 RPM! When I did it, I scared the **** out of Poncho and I took 10 yrs off the life of the engine.
The Ferrari specialist (FerrariFixer on the board here) told me that supposedly the units are sealed and you can't see that. When I'm back in town next week, I'll check it out.
Pap, I'm wondering how long my engine will run with no oil in it - will you go out and drain the oil from your engine and drive it around for a while to check for me?
PAP...you really did that? Why on earth would you do that to your beloved 348?! Someone would have to point a gun to my head to make me rev a cold engine like that...maybe not even that would be enough
I sure did. I shouldnt have, but meh. Its all good. Only last 0.1 secs on the limiter anyways. Nothing like stretching conrods first thing in the morning. I feel sorry for my pup. She sh*t herself! These are Ferrari engines! The BEST engines in the world! If these engines cant handle a little valve bounce when the engine is cold, then Enzo Ferrari shouldnt have told the world that Ferrari makes the best engines!
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I forgot to update this. The O2 sensor and the crank sensor, both on the 5/8 bank, died. Diagnosed by the OBD. Replaced them with new, she's driving like she should
