Page 1 of 1

Help! Low Oil Pressure Stuck in Limp mode no light or codes

Posted: Thu Aug 15, 2024 4:51 am
by miataK24
K24a2 swapped miata
I am a noob so be patient with me. Still learning. So, did something stupid. Left my oil cap loose and it rattled off while driving. A few minutes from home the car started to bog at 3000 rpm. Checked hondata and fuel is getting cut.

Topped off oil, maybe a quart low. K24 takes 7 quarts.

I don't think I damaged the engine because it didn't get too low.

However, I am stuck in this limp mode. No CEL light or codes to read. I unplugged the battery twice already. Nothing.

Can't drive over 3k rpm. Fuel cuts.

Any ideas? Datalog link: https://www.dropbox.com/scl/fi/2ghiegvt ... 1c9oa&dl=0

Re: Help! Low Oil Pressure Stuck in Limp mode no light or codes

Posted: Thu Aug 15, 2024 9:18 am
by Spunkster
Post the file here, as I cannot open it.

Re: Help! Low Oil Pressure Stuck in Limp mode no light or codes

Posted: Thu Aug 15, 2024 6:58 pm
by miataK24
Attached : )

Re: Help! Low Oil Pressure Stuck in Limp mode no light or codes

Posted: Fri Aug 16, 2024 9:05 am
by Spunkster
The TPS does not appear to be reading correctly.

Re: Help! Low Oil Pressure Stuck in Limp mode no light or codes

Posted: Fri Aug 16, 2024 12:44 pm
by miataK24
Ok, I will take that off and check it. Maybe I need to recalibrate it too.

Re: Help! Low Oil Pressure Stuck in Limp mode no light or codes

Posted: Mon Aug 19, 2024 10:25 am
by miataK24
I replaced the TPS and same issue. The weird thing is that I can rev passed 3k rpm in neutral but not under load in any gear. Thoughts?

Re: Help! Low Oil Pressure Stuck in Limp mode no light or codes

Posted: Mon Aug 19, 2024 11:24 am
by Spunkster
Post the calibration used as well as a datalog showing the issue.

Re: Help! Low Oil Pressure Stuck in Limp mode no light or codes

Posted: Mon Aug 19, 2024 5:52 pm
by miataK24
So, TPS works with key on but not with engine on. Reads fine with just the key on. Reads 0% with engine on.

Maybe a fault somewhere?

Re: Help! Low Oil Pressure Stuck in Limp mode no light or codes

Posted: Tue Aug 20, 2024 8:55 am
by Spunkster
It sounds like there is a problem with wiring or the sensor. You should also try your ECU on a known working vehicle and see if it reads correctly there.

Re: Help! Low Oil Pressure Stuck in Limp mode no light or codes

Posted: Wed Aug 21, 2024 10:30 am
by miataK24
After all that troubleshooting it was the TPS sensor.