991.1 Low Water Pressure?
04-01-2022, 06:04 PM
#16
Rennlist Member
Thread Starter
And the saga continues...
Nearly 100% certain it's the pressure sensor. Ordered a new one today and should be a quick and easy swap. Will know by next week.
Basically on a cold startup, it will build pressure and report proper pressure just like normal as shown above. But after the system already has pressure in it, and your turn off and on the car again, it will constantly read 0.0 bar for pwat.
No air bubbles, water pump working (front radiators heat up, engine oil and water temps stay perfect), water level filled properly. So pretty clear cut and dry case of a faulty sensor.
Nearly 100% certain it's the pressure sensor. Ordered a new one today and should be a quick and easy swap. Will know by next week.
Basically on a cold startup, it will build pressure and report proper pressure just like normal as shown above. But after the system already has pressure in it, and your turn off and on the car again, it will constantly read 0.0 bar for pwat.
No air bubbles, water pump working (front radiators heat up, engine oil and water temps stay perfect), water level filled properly. So pretty clear cut and dry case of a faulty sensor.
04-01-2022, 06:38 PM
#17
And the saga continues...
Nearly 100% certain it's the pressure sensor. Ordered a new one today and should be a quick and easy swap. Will know by next week.
Basically on a cold startup, it will build pressure and report proper pressure just like normal as shown above. But after the system already has pressure in it, and your turn off and on the car again, it will constantly read 0.0 bar for pwat.
No air bubbles, water pump working (front radiators heat up, engine oil and water temps stay perfect), water level filled properly. So pretty clear cut and dry case of a faulty sensor.
Nearly 100% certain it's the pressure sensor. Ordered a new one today and should be a quick and easy swap. Will know by next week.
Basically on a cold startup, it will build pressure and report proper pressure just like normal as shown above. But after the system already has pressure in it, and your turn off and on the car again, it will constantly read 0.0 bar for pwat.
No air bubbles, water pump working (front radiators heat up, engine oil and water temps stay perfect), water level filled properly. So pretty clear cut and dry case of a faulty sensor.
I noticed a few races ago, never fixed it, forgot about it actually until today and even drove a couple of endurance races after that.
But yours is probably different as you have low water pressure?
04-01-2022, 08:05 PM
#18
Rennlist Member
Thread Starter
Ya I gives me the dash warning non stop. In your case, I'm guessing it doesn't give you the error because the requirements to display error are pressure <.35 bar for over 10 seconds so if yours reads >.35 bar even for a moment then it won't trigger the alarm.
I also found out that if you unplug the wire from the sensor it reads at 1.0 bar flat, and I'm guessing it should also prevent any alarms.
Got a new sensor arriving from PMNA tomorrow, should be a super easy swap. Then back to the track next Thurs to confirm all is well. More of a nuisance than anything at this point now that we know for certain it's not an actual issue like a faulty water pump.
I also found out that if you unplug the wire from the sensor it reads at 1.0 bar flat, and I'm guessing it should also prevent any alarms.
Got a new sensor arriving from PMNA tomorrow, should be a super easy swap. Then back to the track next Thurs to confirm all is well. More of a nuisance than anything at this point now that we know for certain it's not an actual issue like a faulty water pump.
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koolm (04-02-2022)
04-07-2022, 05:20 PM
#19
Mine would alarm if it was less than 60 Degrees out and I didn't let it warm up completely in the paddock. Not saying this is the issue, just reminding everyone. You taped it up just like I would have in those ambient temps. Just reminding everyone to let it get nice and warm before you go out.
04-08-2022, 12:35 AM
#20
Rennlist Member
Thread Starter
New sensor installed, full track day today - all drama free. sensor resolved the issue!
Thanks for the help all
Thanks for the help all