350z drop in oil pressure at idle
#1
Registered User
Thread Starter
iTrader: (1)
Join Date: Sep 2013
Location: Tampa
Posts: 134
Likes: 0
Received 0 Likes
on
0 Posts
350z drop in oil pressure at idle
I got an Osiris tune today, and I ended up having problems with what we think is my cats. The guy set my tune back to the factory, but with an 8100 rpm redline. I hit the redline on the way home, and now my oil pressure at idle is 14-15 psi, when before that one time I hit the redline it was 30-31 psi. They hit the redline over and over on the dyno, and I only hit it once while I was driving. The car was up to operating temp, I was in first gear, my car is all the way full of oil, I'm using mobil1 0w40, my car has approx 43000 miles, no ecu codes. What gives?
Last edited by booozy; 11-04-2013 at 05:20 PM.
#2
Super Moderator
MY350Z.COM
MY350Z.COM
iTrader: (8)
Oil is hot,you lose pressure with added heat.
#4
Registered User
Thread Starter
iTrader: (1)
Join Date: Sep 2013
Location: Tampa
Posts: 134
Likes: 0
Received 0 Likes
on
0 Posts
I just checked the oil and it was cool enough to touch, yet it is still low. Im afraid of it being the oil pump, but after researching thats kind of what it looks like because of the higher redline. Is it possible that the lower oil pressure was set by the tune?
Last edited by booozy; 11-04-2013 at 06:09 PM. Reason: oil, not idle
Trending Topics
#8
Registered User
iTrader: (8)
Make sure your oil is not excessively low. Where is it on the dip stick, how far between H and L, or is it not even determinable (below L)? 8100rpm? Are you making power that high even? Seems pushing it unless you are built even for an HR. Engine life will decrease with higher rpm usage. If oil is low, and you start having to add oil, immediately get a compression/ leak down test. Who was this tuner? What shop? Low oil px at idle like you describe sounds bad. Hope that tuner didn't fk you. Also how many miles on the engine?
Last edited by mcarther101; 11-05-2013 at 03:10 AM.
#11
Registered User
Thread Starter
iTrader: (1)
Join Date: Sep 2013
Location: Tampa
Posts: 134
Likes: 0
Received 0 Likes
on
0 Posts
Make sure your oil is not excessively low. Where is it on the dip stick, how far between H and L, or is it not even determinable (below L)? 8100rpm? Are you making power that high even? Seems pushing it unless you are built even for an HR. Engine life will decrease with higher rpm usage. If oil is low, and you start having to add oil, immediately get a compression/ leak down test. Who was this tuner? What shop? Low oil px at idle like you describe sounds bad. Hope that tuner didn't fk you. Also how many miles on the engine?
#17
Registered User
Thread Starter
iTrader: (1)
Join Date: Sep 2013
Location: Tampa
Posts: 134
Likes: 0
Received 0 Likes
on
0 Posts
So you did an oil change and that fixed it? I emailed the shop and that's what they said it sounded like from the email. I'm going back over there today so they can take a look.
#18
Registered User
Thread Starter
iTrader: (1)
Join Date: Sep 2013
Location: Tampa
Posts: 134
Likes: 0
Received 0 Likes
on
0 Posts
The place said it is probably the sender. Which makes sense because it says I have like <5 psi at idle and still sounds/drives normal. Do you have to drain the oil to replace the sender? And are too many oil changes in a short period of time bad for your engine? I dont want to change my oil for the third third time in 2000 miles unless I have to
Thread
Thread Starter
Forum
Replies
Last Post
bcoffee20
Zs & Gs For Sale
5
11-19-2015 06:39 PM
Vigman
Maintenance & Repair
17
11-17-2015 04:34 AM