430 Still not fixed the SLOW DOWN issue

That looks like the same mannetino failure warning that was on another thread recently. I think upon scanning there were network errors. (Uxxxx error codes).

As usual, we need to be able to see the fault codes to be able to help any further. Even if the fault isn’t active now, it will be stored.


Sent from my iPhone using FerrariChat

 

Slow Down light is associated with the cats overheating. This sounds like that is actually happening and the heat loading is causing issues with your F1. Have you checked the temp of the cats with an optical thermometer when the problem happens? How about the fuel trim? I have a few guesses but start with some specifics about the engine.

 

Let's see, you put the transaxle between two 800 - 900 degree heaters, what could possibly go wrong with that? Then, make the engine run way too rich so they are actually over 1000 degrees, hence the slow down light. For comparison aluminum melts at about 1700. Running at speed with a lot of air flow and it works ok. Stop with no air flow to cool and suddenly problems. Nah, can't be related.

So how is it you "cleaned" the cats? Cats are a metallic matrix with catalyst metals plated onto them. How exactly did you clean them? That statement alone makes me think I am right.

 

If an error code came up, it will be stored. Remember, there are lots of ECUs; if you can’t find the stored code, then you’re not looking into the correct ECU.

The mannetino fault is associated with suspension and stability control, as well as engine, steering and gearbox. You need to interrogate all of them.

The slow down lights on older models are specifically related to exhaust temperature, though I’m not sure if they may be used for other things on the 430? I could be wrong. In any case, the other warning symbol isn’t related to exhaust temperature.

Sent from my iPhone using FerrariChat

 

You need a good knowledgeable f Car mechanic.

 

Above posts are incorrect. Red slow down light is transmission related. This is what you have. Yellow slow down light is cat temp related, which is usually a faulty thermocouple sensor on the left or right bank.

 

no error on which module? u need to look at: both ignition ecu, TCU and e-diff module.

 

Driving 400 miles in top gear will give you less heat, the engine is running less load- also you have a good airflow over the cats. If you look at the floor under the engine you will see it is sealed apart from 2 cutouts so the airflow is limited.
My 08 does not have the temp sensors fitted as they stopped fitting them when mine was built

 

You’re completely right. It was late. That picture was throwing me off and got them switched up. Thanks for correcting me

 

Curious, what country are you located in?

 

Here's what you need to do:
1- Purchase a temperture gun - reads temp by pointing it at Cat
2- Drive car until light comes on - immediately stop, open back lid & measure temp on both Cats (you might find them glowing red)
3- If the temp is high (above 800 F) you have a "real" heat problem, if not then you likely have a failing module that measures the cat temp (this is a frequent issue)
4- If you have a real heat problem it's likely unspent fuel getting into the cat and burning in it. This could be caused by a LOT of different things - you will need a computer that can measure fuel trim and O2 wide band. If the prior owner removed cats they could have also "tuned" ECU, that could be part of your problem depending on if it was done correctly

Good luck

 

I mis-typed. If it’s above 800C you’re in trouble. A cat should be ~800F when working correctly, that’s the temp usually necessary to perform the catalyzing.

 

Take the car out and get it to shoot the error code and read the temps. That’ll get you on the right path

 

Before you throw down $700 on an X431, get an Autel AP200. It reads all the systems on the car and only costs $70. Unless you're going to be doing the work yourself, an X431 is a bit overkill.

 

Not an expert but have an engineering background. Can you go between N->1 rapidly and still get the problem to appear? Also when was the last time the F1 fluid was changed?

 

I have a 2005 f430 that has had this intermittent problem since I bought the car 4yrs ago and my dealer (Naples Motorsports) has not been able to duplicate the problem to find a solution. No stored codes with the amber slow down and no other warnings occur.Happens if car is being driven hard or easy.I am very interested in this discussion and solution.

 

My prediction is the accumulator needs replaced OR there is a pressure sensor that tells the system when the pressure has dropped, that could be causing issues. Of course there is a limit to how many times you can shift fast before you overtax the system but I don't know what that number would be. The pump typically comes on after a fairly small number of shifts so the limit on number of rapid shifts can't be too big.