guys, do the pix below seem to indicate some wiring fault from the sender? the gauge was perfectly fine till last night....after a very spirited run..(well if hitting 160-165mph is not, then i'm prob wrong!) the oil pressure gauge this morning went a bit berserk... so in www.my348.com , it says that to get access to the sender, get the oil filter out....then what? is it just there behind the filter? ps: had a friend who with his dad had a 355spider, currently has a 360spider and a 550......never had been in a 348 and he kept saying 'f*ck the world', "f*ck me" and a few other profanities here and there a bit too many times while in the passenger seat.....got down and said..... "a Ferrari is a f**king Ferrari".....so the story is, he was told to stay clear away from the 348 when he was in for his first F-car many years back and guess what.....well i think his profanities speak pretty much for itself (unless he was cursing the way i drove...ahaha) anyway, the pix below....first at about idle and the other at about 2000rpm..cheers. Image Unavailable, Please Login Image Unavailable, Please Login
It's right above the oil filter. Look for this thing... I know that it's a bit out of context when removed from the car, but maybe this helps: Image Unavailable, Please Login
ok ill first get the wiring checked and next see if grounding could be the problem......thanks for pointing out where the sender's exactly located.....cheers
Anybody ever find a solution to this problem? It has started on my car as well. The TSB referencing the ground strap to the oil tank seems to be specific to the oil temp gauge and not oil pressure. Any suggestions? Thanks
High pressure usually means low resistance. Is your oil pressure wiring shorting out to something? Are the other instruments behaving normally?
From my experience, sending unit. Gage would work ok sometimes then show max oil pressure. Replaced sender and all was fine.
VDO oil pressure senders have high resistance at high pressure. If the sender is disconnected (resistance = ∞), the gauge will peg to the right. The too high reading on the gauge could mean the gauge going bad, bad sensor or the wire connection to it, or sensor's path to the ground, has developed some resistance.
I had one of the 2 wires to the sensor become disconnected. Oil pressure gauge was off the chart. Crimped on a new connector and ever since then it is fine. Also have a ground wire running from the bottom of the remote oil filler tank to ground. I guess some one before me had a problem with the sender ground..
... and I confirmed this on my own car a few moments ago. I think someone on the 360 forum said the opposite, but the setup on the 360 is the same as the 348 and 355. Fuel and temperature are opposite.
The oil pressure sender uses the engine block as a path to earth. There is a ground strap from engine block to the chassis. Since a lot of the engine electronics uses the same earth path, it's less likely to be an earth strap problem (unless you are experiencing other problems).
So basically make sure the sender connections are not dirty or hanging on by a single strand of wire. Assuming that's ok, it's up to you if you want to go straight into part replacement or pulling the car to pieces for further wiring checks. Are we talking about a 355 or 348? If a 348, there's that notorious connector foward of the LH rear strut.
