[xxtoobsxx]

Just am update. Swapped pumps and clutch selenoid valve and all was great until like Nov of last year. Car took a dump, f1 pump went out. Swapped it for a Selespeed pump to take it to the shop. Car ran fine but about 3 miles from the shop (19 mile drive total) I got the "reduce gear changes" and when I exited the fwy for the shop exit the car stalled.

Towed it the rest of the way, shop said the pump use was a 30A not a 40A, used my oem pump (first pump I swapped thinking it was going out) to test it and it died on him. Shop reccomded I swap in a new oem pump and replace fuse, bleed and test it. He told me to do it since I'm his opinion I was a very capable diy mechanic.

Shop gave me their contact for ferrparts, I ordered the oem pump. However I got busy with work and holidays so it just sat in my garage. I got real lazy (jacking the car up was a hassle), so I bought I quickjack, swapped part within the hour replaced the fuse, opened door and all seemed fine. I told my self I'll bleed it the next day. Hah... Well a week later (today) I lifted the car up, went to bleed it and the pump just keep running. I pulled the fuse to preserve the pump.

So now, I have a new pump, new fuse, new relay and the damn pump just runs. When I pull fuse to shut the pump off I hear a hiss sound. So there is that... I love this car and the f1 system but I'm ready to lite the car on fire.

Anyone have any ideas or recommend course of actions?

 

[Jason@ Enzo`s Atlanta]

I get the frustration....The pressure switch should read the pressure and shut off the relay via the TCM...I would crack the 11MM line on the pump outlet and see if it is actually pumping...You need to break it down into a mechanical issue..No pump pressure, air etc... or an electrical issue..Jason

 

[82elky]

It might help diagnose to read the system pressure if you have the capability. I’m not very familiar with it, but I would think if the pressure is reading zero/low, the TCU will request the pump to run. If it’s high, it should stop running it. An unplugged pressure sensor could seem like zero pressure depending on the sensor output (just a guess, not knowledge, and a well designed system would know the difference between unplugged and zero). As suggested, cracking a fitting can confirm the presence of pressure.

 

[xxtoobsxx]

I get the frustration....The pressure switch should read the pressure and shut off the relay via the TCM...I would crack the 11MM line on the pump outlet and see if it is actually pumping...You need to break it down into a mechanical issue..No pump pressure, air etc... or an electrical issue..Jason

Great advice, going back to basics is something I tend to forget to do. The pump is pumping, and the TCM shuts off the relay when I open and close the door. So I was in a state of WTF. but when it wouldn't turn off with the ignition on I pulled the fuse to not burn out another motor. When I do that I hear an air hiss. I can't quite pinpoint it but it sounds like it's on top of the transaxle, maybe accumulator? That would make sense as to why it's not building pressure. All fittings and bolts are tight and there are no visible leaks. Maybe its time to send it to a pro...🤷‍♂️