Ferrari 456 : Oil Sender/Sensor questions - Ferrari Life
 
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post #1 of 3 Old 02-23-2012, 08:25 AM Thread Starter
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Ferrari 456 : Oil Sender/Sensor questions

I appeal to the better mechanics in the group:
This last two days, my readings on the oil pres. lbs/in show it pegged to the right, well past the 170 mark. I don't believe it is that much pres in the system but a bad sensor/sender problem. I have checked the oil numerous times in panic and find it normal.
....but with some 'other' issues starting to creep up where Iím sending it to the shop, I'm wondering.

I don't know how these sensors in Ferraris directly work. I would expect a simple pres diaphragm connected to either an electrical/digital mech going to the pres gauge
OR
like in them olden days, just a direct tube of sorts, but I doubt this latter is used anymore in modern production.

QUESTION:
- I would expect a bad sensor to express at low or normal pres but NOT above normal, pegging out the reading. Is this true?

IF I drive slow, in the 2,500-3k RPM scenario, it is Ďalmostí normal. IF I stomp on it, of course it pegs. IF I am going up/down a hill it doesnít matter ?!?!?!

What am I missing?

BTW: The Oil Temp constantly reads low too, where I truly believe that to be a sensor problem as well.

Guide to the Galaxy: Don't Panic
Rik -- LAH !


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1995 456 GT 2+2 SN 99987 : Roso Metalizzato [Fer 311/C] & Tan
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post #2 of 3 Old 02-23-2012, 08:55 AM
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Rik- Not an expert on sensors, but it sounds like the sensor is possibly shorted internally or you have a short in the wiring allowing excess voltage to be seen by the gauge.

What is low oil temperarure? It takes a while for mine to get up to temperature and yours has the same 10-12 quarts of oil mine does. If way low, sounds like a bad connection somewhere.

Taz
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post #3 of 3 Old 02-23-2012, 09:20 AM Thread Starter
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Quote:
Originally Posted by tazandjan View Post
.........
What is low oil temperarure? It takes a while for mine to get up to temperature and yours has the same 10-12 quarts of oil mine does. If way low, sounds like a bad connection somewhere.
Low is like it hardly ready above the left/zeroish marks. ONLY when after a healthy run does it register upwards. I as you believe it's a sensing issue.

I expect BRIAN will sort it out, but I did not expect it to peg as extreem but rather on the low/mid range. Short makes sense now.

Guide to the Galaxy: Don't Panic
Rik -- LAH !


Current:
Past:
1990 Mondial T Cabriolet SN 86247 : Red/Tan
1995 456 GT 2+2 SN 99987 : Roso Metalizzato [Fer 311/C] & Tan
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