[Argento]

Yesterday, as I do most weeks during winter aly-up, I started the 550 up...It started 1st time as usual went through it's engine check routine, Said "OK"...

But once warmed thro' for about 15 minutes I took it around the block, and noticed the Oil Pressure gauge moving in sync with the revs as I pressed the accelerator....at 3,500 rpm it was mid point on the gauge were it normally stays, but at 5,000 rpm it was approaching 140 lbs/In, So I limped home....Does anyone have a diagnosis?

I checked the Oil resvoir, It was on Max.

Argento

 

[Magnum6464]

Where does it normaly sit at idle ?

The more revs, usualy oil pressure goes up.....


~

 

[Boxer]

What year is your 550 ? Early 550's are know to develop oil pressure problems. It is fixed by removing a few spacers in the oil system.

I would try to run the car again today to see if the problem re-emerges. It might just be a tempermental gauge that sat in the cold for too long.

 

[dersark_painclinic]

What year is your 550 ? Early 550's are know to develop oil pressure problems. It is fixed by adding a few spacers to the line.

I would try to run the car again today to see if the problem re-emerges. It might just be a tempermental gauge that sat in the cold for too long.

My 550 is 1999, when idle the pressure is 35, but on higher RPM the oil pressure gets to #110 PSI. it should be # 80 PSI. Where you add the spacers, which line. thanks.

 

[Argento]

What year is your 550 ? Early 550's are know to develop oil pressure problems. It is fixed by adding a few spacers to the line.

I would try to run the car again today to see if the problem re-emerges. It might just be a tempermental gauge that sat in the cold for too long.

Hey Box,

It's a 2000, I'll try it again tomorrow and let you know, Maybe it's always been that way, I've just never noticed before?
Garage is heated and de-humidfied so conditions are pretty much the same all year round.

Argento

 

[Boxer]

The oil pressure problem was unique to the early 550's. If my memory is correct, it was fixed by the 1998 MY.

I has a fault oil pressure gauge on a 456 GT several years ago. It read very high and need to be replaced.

 

[Boxer]

My 550 is 1999, when idle the pressure is 35, but on higher RPM the oil pressure gets to #110 PSI. it should be # 80 PSI. Where you add the spacers, which line. thanks.

Either your local official dealer or any good independent specialist should be able to do it for you. Also I believe the spacers need to be removed, not added.

 

[Boxer]

Here is the link to a good artice by Michael Sheehan on the 550:

http://www.ferraris-online.com/Articles/SCM_0212.shtml

 

[goldyF355]

I used to have this exact same problem on my 2001 550.

It turned out to be a defective oil sender unit, once replaced, everything was fine. One of the cheaper fixes, and I have heard of them going wonky before...you might want to try a new one and see.