checking out an 86 mk3 tomorrow

cre · 02-24-2010, 05:50 AM

The ECU requires an oil pressure reading within the same range as the stock oil pressure sender provides at any given RPM. Oil pressure senders provide signals which can vary greatly from one make and model to the next. you can run without the stock sender in there for a while but you may notice a loss in power and mileage. So, even if you do add an aftermarket gauge you do need to replace the stock sender (even if you don't use the stock gauge).

15psi is vague as hell... at idle? High or low? At low idle and at normal operating temps the oil pressure may be anywhere from 4.3psi to 40psi and still be within spec.... 4.3psi is the minimum pressure at normal operating temp and warm idle. The oil pressure you're really after is 3KRPM and above; You want 36psi+.

http://www.cygnusx1.net/Supra/Librar...Section=LU&P=4

02-24-2010, 05:50 AM	#255
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	The ECU requires an oil pressure reading within the same range as the stock oil pressure sender provides at any given RPM. Oil pressure senders provide signals which can vary greatly from one make and model to the next. you can run without the stock sender in there for a while but you may notice a loss in power and mileage. So, even if you do add an aftermarket gauge you do need to replace the stock sender (even if you don't use the stock gauge). 15psi is vague as hell... at idle? High or low? At low idle and at normal operating temps the oil pressure may be anywhere from 4.3psi to 40psi and still be within spec.... 4.3psi is the minimum pressure at normal operating temp and warm idle. The oil pressure you're really after is 3KRPM and above; You want 36psi+. http://www.cygnusx1.net/Supra/Librar...Section=LU&P=4 __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->