Buffalo Fcar mechanic and 360 "slow down" light

If he just bought it maybe he forgot to wait for the OK light

 

There is a Maserati dealer in Rochester.possible to diagnose? Toronto,Syracuse. I'd like to know too.

 

Bad coils. Known issue. Replace them and should get better.

 

The first question that needs to be answered is did the slow down light come on when the engine was hot or cold?

If it was cold then problem is more likely to be with the thermocouple or cat "ECU". Try swapping one from side to side to see if the problem follows the part.

If the light came on when the engine was hot then it is likely that the thermocouple and ECu are working and the engine is misfiring - this releases unburnt fuel into the exhuast which burns up in the cat, overheating it. A bad coil has got to be the number one suspect. Use a cheap IR heat gun on each exhaust outlet from the head to see which is running cooler than the other three - that will tell you which is the problem cylinder.

 

Slow down sign is really a 'pain'. Its there on ignition and disappeared after restart. today, it blinked and was constantly on after 10 minutes of driving. On restart, it disappeared and did not come on until I drove home, maybe 15 minutes. Got my tech to check the values of the thermacouple, seem fine. Not sure whether the Cat ECU is working or not. Its a green rectangle box- does anybody know whether this is BOSCH product, if so, what is the component number?
So when does the car considered 'hot', after driving 10 minutes? to reach 900deg. n above? to trigger slow down light?
This is a 2004 360 which has the Cat.ECU.
Can we use 430 ignition coils on a 360? Are they the same.
Appreciate all assistance.

 

If it comes on right on startup on a dead cold engine, its not a coil issue. No way cat can be 800 degrees or whatever in 2 seconds of running. Its the little electric box that the thermocouple attaches to. Gone bad. Just replace and it should go away. The insulation cracks and lets in moisture that kills its electronics.

 

I just got a similar problem when i was on my way to work yesterday. The light stayed on solid and then one bank shut down then I pulled over shut the car down for a minute or two. Restarted the car and no problem. Later in the day I drove it about 50 miles and no problem. Today on my way to work slow down light flashed then went immediatly away and engine light came on and stayed on. Im not sure if the car is safe to drive till i get it towed to the dealer which is unfortunately 100 miles away in Las Vegas. Any thoughts???

 

Go for a night drive, 20 minutes or so of reasonably fast driving. Pull over in a dark area and check to see if one or other Cat is glowing red hot. If it is you probably have an ignition problem, if not you probably have an intermittent problem in one of the four warning components.

 

Interesting enough my right hand fuel pump failed and left hand pump is over pumping with high pressure and feeding right cylinders. Tomorrow I'm picking up a new fuel pump at the dealer in vegas. Obviously not driving the 360 and risk burning up my cats!! This should fix the problem. I'll keep everybody posted.

 

Ummm. No. (unless you meant differently in your post above)

The line from the fuel pump goes directly from the fuel pump outlet to the fuel rail.

There is no pipe to feed fuel from one side to the other. Right fuel pump = right. Left fuel pump = left. When the fuel pump dies on that side, the fuel rail should not be getting any fuel.

The other pipes on the tank are for fuel vapors.

 

Gary:
I'm in Buffalo; he could start with these two places; (they have serviced my friends 458)

Village Import Auto Sales and Service

Toll Free: 877-707-5783

Black Forest Motorsport
716-634-1200 (many friends have been there; lambos to anything german)

 

Be careful. Not many Ferrari's in Buffalo and therefore the experience is not very heavy. BF does not have too great of a reputation. Better off going to F of Ontario.

 

Forgot to mention Ferrari/Ontario. There's more here than you think.....

 

This means that half of your engine is shutting down to protect itself.

Happened to my challenge car.

It's most likely your exhaust sensor. Cantech automotive in Syracuse has all the diagnostic tools and experience fixing Ferraris and other European cars. 315 452-1168

 

Just got finished changing my right hand fuel pump and drove 15 miles or so and no slow down or engine light. Problem solved I'm jazzed!!!
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Got the same error code on my 360 when blasting through rural Nova Scotia on a rally. My wife thought it was hilarious that a Ferrari would tell you to "Slow Down." It was an exhaust sensor, as mentioned above.

 

Happy for you.

This is an unusual "slow down" cause/remedy.

Perhaps the pressure regulator on the fuel pump had failed, causing over pressurisation of the rail on that side, to the extent that the injectors, even by lean-ing back to full, were not able to prevent over-fuel situation and hence the hot cat and slow down?

Anyway, glad Dr.B is back on the road and smiling.