so you want to work on your ferrari but are scared to death....

Clyde I've already changed both gasoline filters. it was just a gasoline filter very old ..
Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login

 

https://www.ferrarichat.com/forum/threads/diagnostic-tester.602214/

 

also check your throttle cable on your 550 the heat will break the shielding and cause you problems
there is a tremendous amount of heat underneath the hoods of these cars that cause issues

 

oh yea that was your fuel problem
and don't use the K&N air filters
the oil that is used the vapors attack the intake manifold air flow meter sensors wire and cause lots problems

 

Oh I have K&N Filters in my Maranello and Rolls-Royce, BMC in my 512tr engine

 

K&N are fine just don't oil them. They come with very little and are good for 50k miles. People clean them and over do the oiling and then you can get problems.

 

I will have to agree with Clyde on this one. K&N filters require oil to be used on them as part of their filtration. That is how they claim to have higher airflow and less resistance- they filter less! This is one of those situations where you want to use the OEM air filters.

 

This has been thrashed out many times before. Yes they have oil, but from new virtually undetectable. In all my cars with K&N I have never seen any oil residue after the filter. Never had a problem. They've been in my 430 for 3 years now. I have also never oiled a K&N filter. Maybe the next owner can do it and have the problems.

 

too each there own
I was just putting it out there since I have seen it numerous times on vehicles of all types that have air flow meters
and since I am new to this forum I was totally unaware of previous post
so that's my excuse
hope that satisfies you !
but there is significant data on the air mass wire being coated with oil from K&N air filters
and I will leave at that

 

I change the Maranello and the RR back to normal air filters...

 

you’re smart
You can use the K&N filter just don’t oil it
Unless your driving in the desert with sand
You will be fine
Air filtration is highly overstated
Check your throttle cable while your at it
And apply heat shielding to your brake mater cylinder area
And around your battery box as well

 

Wow yes that was your problem
Glad I could help

 

Today I was finally able to drive my Maranello on the street. It has more power but the higher the gear, the lower the speed where it loses power. So I have another problem, or the gasoline filter problem caused another problem. Has the cathalyser become too hot? Gotta have a beer today ...

 

ok so you might have stale fuel or water in the fuel
try a full tank of fuel and run a tank through the car
if you have injector cleaner try some of that as well
over here in the states I use https://www.marvelmysteryoil.com/ or chevron Techron
remember your fuel injectors have been suffering with poor fuel filtration
it will clear itself up
I doubt it is the Cat
when they get clogged they overheat
try the easy stuff first
let me know

clyde

 

Here is a picture of my two Maranello and my RR K&N filter with cleaning kit from BMC. I also checked the intake manifold flap control and the exhaust flap control. Then I measured the gas pressure on both sides. Both sides around 3.2 bar. Then I measured the amount of petrol delivered for 30 seconds. On the left it was only 0,2 Liter and the engine stopped and on the right 0,95 Liter. So the left fuel pump is defective or the intake is blocked. Tomorrow I will see if it is the Bosch 580453443 and if it is broken. After work I sit in my Ferrari in garage and dream driving again at Nordschleife/Nürburgring..
Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login

 

ok so we now know its a fuel delivery issue just as i suspected
if you have 3.2 bar of pressure which is around 46 psi
it is not the fuel pumps because you would not have that much pressure
i think you have a clogged up fuel filter again
i would replace the left side fuel filter again and see if the flow improves

clyde

 

Can you check flow before filters

Sent from my moto g(7) using Tapatalk

 

Yes with much work this is possible. Best way I look at both pumps and change then left to right
and then see what comes out at the front left and right. So I can determine whether the pump has something or the line with filter.
Image Unavailable, Please Login Image Unavailable, Please Login

 

if there is a way to do that
I don't know it
a quick change of the suspect fuel filter should tell you if that fuel filter is clogged with stuff from the fuel tank
you have equal pressure in both sides so its not the fuel pumps
so thats my best guess at this point
let me know what you do
you might have to clean out the fuel tank if thats possible

 

question?
what do you have tied down in the back of your 550 with the straps?

 

That's the body of the Ferrari mechanic who ripped him off. He can't dump the body in a remote area until the car is running properly.

 

that was too funny
you guys
are too much

 

I have the Schedoni Maranello suitcases for my many Ferrari clothes on the shelf. I also have a lot of Schedonis for F355 and 512tr. I have now completely removed the pumps and it is like in the video. The jackets of the pumps have become worried and have clogged the pump opening. In the video there is a pre-filter in front of the pump. My pump is the Bosch 0580 453 427. On the Internet is the Maranello 0580453443. At Amazon a pump costs around $ 35 ...

Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login

 

ok so its like I thought the rubber around the pumps have come apart and are in the fuel tank causing you the recurring problem
this is a common problem
with the 550 especially with the ethanol fuel
it eats away the rubber
especially if you don't fill the tank to the maximum
after you drive it which is a must
you will need 2 new pumps and I hate to say this 2 new fuel filters as well once you complete the job
I wish i could tell you how to clean out the tank but I have never done that
I will ask around though and get back with you
but i am glad you found the issue
take you time and you will have a normal operating car one again
looking forward to hearing all this all comes out
I only hope you have not damaged any fuel injectors
I would buy some fuel injector cleaner as well as a precaution

 

ok so i saw the video and he tells you how to clean out the tank
great
you should have no issues going forward
i just new it was a fuel delivery problem from the outset