360 Strange problem with obscure fault code. - Ferrari Life
 
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post #1 of 6 Old 04-04-2017, 09:40 AM Thread Starter
 
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Strange problem with obscure fault code.

2000 360 6-speed.
The car starts, runs and drives perfectly. However, after being stopped for about a half hour, when I start the car, it insists on idling at around 300 RPM and will continue to do so until I give it some gas. Then it idles fine (1100 RPM) and drives fine. The "check engine" light comes on while it is idling at 300 RPM but goes out when I give it the gas and it returns to a normal idle. If I "catch it in the act" and check the code while a very low RPM, the code is P0385 (crankshaft trigger sensor 'B'). Difficult to find any information on this.
Has anyone seen anything like this? The battery is fresh, the MAFs have been recently cleaned, the cats have around 30K miles on them and the O2 sensors are relatively new.
Thanks
:-)
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post #2 of 6 Old 04-04-2017, 02:38 PM Thread Starter
 
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I swapped the drivers and passengers side sensors and tried it. Now it throws the code "crankshaft trigger sensor 'A'". So swapping the sensors changes the code from side B to side A. I think a new set of sensors is in order.
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post #3 of 6 Old 04-04-2017, 02:49 PM
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First, I'm neither a 360 expert, nor a DBW throttle expert.

The idle speed is programmed into the ECU('s), so is under ECU control, and they do it by either controlling the main DBW throttles, or possibly idle air control valves, if the car is so equipped.

The ECU('s) are throwing codes, so they obviously aren't happy the car is only idling at 300 RPM, so that's telling me the main throttle shaft(s) may be sticking, or the idle air control valves are sticking.

Time for some carb cleaner on the shafts. If that doesn't sort it, then I'd bring it to a trusted Ferrari technician.

'99 550, Rosso Corsa / Nero, S/N:114654, Assy: 31836, Engine: 52084

High mileage, low compression, and missing on a few cylinders.....just like my cars.

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post #4 of 6 Old 04-09-2017, 10:24 AM Thread Starter
 
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Fixed.
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post #5 of 6 Old 04-09-2017, 08:05 PM
 
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problem fixed

Quote:
Originally Posted by SoftwareDrone View Post
Fixed.
So what was the fix?
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post #6 of 6 Old 04-10-2017, 01:52 PM Thread Starter
 
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Quote:
Originally Posted by composvoti View Post
So what was the fix?


You mean, besides the part that the computer said was bad on Bank 'B', then said was bad on Bank 'A' when I switched sides?
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