430 Still not fixed the SLOW DOWN issue

I'm hope you get this sorted out and it's not too bad.
If it is F1 related ( I am NOT a mechanic) a good way to check is to open the drivers door and make sure that pump is turning off after a few seconds.
I missed this in my car and it was running for ages.
Good luck.

 

You really need someone with a proper scan tool to diagnose this but here are some things you can check to isolate:

1) with the Engine OFF, how many seconds between pump runnings?

2) with the Engine ON and in Neutral, don’t touch anything and again measure how many seconds between pump runnings

3) on the above, note how many seconds the pump runs each time

This will give us general idea if there is system leakage, bad accumulator and health of the clutch/ediff solenoid


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Could be e diff solenoid or sticking thowout baring

 

There's a suspension error in the video and a drive mode failure in another image so the first thing that I'd do is replace the battery.

On to the F1 error: likely a pressure issue. The problem really needs in-person diagnosis with a diagnosis tool but..

Replace the pump relay as a matter of course. It could be breaking down under high load situations for example when the pump is running more often during repeated gear changes.

Are you really confident that the pump is OK?

If the accumulator was replaced the next place I'd look would be inside the bellhousing to make sure there isn't a leak on the EVF/clutch circuit. This is less likely to cause such a pressure drop with the rest of the system but it's an easy check to make.

The actuator may leak internally as can the solenoids. You can measure calculated solenoid leakage via diag but not internal actuator leakage other than manually by checking the return hose.

 

I Have same problem... Did you ever find the actual issue to fix the slow down?

 

As far as the above,

Is it normal for the pump cycles to be the following:

1- Engine off - 2 mins
2- Engine on in neutral - 15 seconds
3- Gear one to gear three - 15 secs
4- Gear four to gear six - 2 mins
3- Primes for approx 4 seconds each time

Thanks

 

How about e diff control valve solenoid? I replaced that and my accumulator and it solved the issue. I had very similar symptom.

 

The point no one has mentioned is the pressure switch controlling the pump, if this is sticking you will get periods of the pump cutting in late. Also check the volts to this switch and the pump

 

There is a good u tube video about bleeding the e diff. Look under 430 bleeding hydraulics

 

So maybe i missed it but did you ever check or replace the thermocouplers

 

did a quick look...200934 heres a pic
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The red slow down light is associated with cat Temps and there should be a code thrown. When that red slow down light comes on it could send your car into neutral because temperatures are starting to climb. Its a precautionary measure to prevent damage to the engine. Also you will notice the engine missing. Thats because the ecu will shut down the side of the engine thats having issues. I've experienced this same issue. If it is in fact the thermocoupler, you can swap from one side to the other to help troubleshoot

 

ok well i thought the pic you put up indicated Red. Shows a red on page 115 of owners manual

 

First thing I would do: replace the catalytic converter ecus.

 

I dont believe the f430 has separate cat ecu,s like the 355 or 360 has. I think the thermocouples send the signal to the main ecu

 

You're right. No secondary to ECU and OP claims thermocouples were changed. I'd confirm with an resistance measurement and if not that take the e-diff route. Odd they had an amber slow down with the e-diff. I'd expect an F1 light with an e-diff error.. but I'm not as familiar with the 430 subsystems.
Edit: first thing I'd do is clean grounds even before replacing things.

 

Any updates on this issue?