Mysterious oil pressure issue. HELP!!! - LS1TECH

Go Back   LS1TECH > WELCOME TO LS1TECH > New LS1 Owners - Newbie Tech
Sign in using an external account
Register Forgot Password?
Search


New LS1 Owners - Newbie Tech
Basic Technical Questions & Advice
Sponsored by
Improved Racing


Mysterious oil pressure issue. HELP!!!

Reply
 
Thread Tools Search this Thread
Old 03-22-2009, 06:20 PM   #1
On The Tree
 
smgbad's Avatar
 
Trader Rating: 1
Join Date: Dec 2008
Posts: 111
Unhappy Mysterious oil pressure issue. HELP!!!

So I noticed my car is running slightly above the 40 mark on oil pressure instead of slightly below 40 while idling (which has always been the norm). It is also being just a tad wavy instead of solid in it's reading. The cars exhaust has been sounding slightly choppy at idle and on decel lately too (not sure if it matters). So today, I turn the key to the off position to take out the key and the oil pressure gauge stays where it was when the ar was turned off. Then I turn the key to ACC and the coolant temp goes up to show the current coolant temp as normal, and the oil pressure gauge drops to 0. Then when turned back to off (to remove the key) the coolant temp gauge drops to 0 as normal, but then the oil pressure gauge reads around 20 (instead of 0). So right now, the key is out of the car for the night and the oil pressur gauge as of when I left the car still reads just above 40. Anyone know whats going on? Should I be worried, and if so how do you correct this problem? Thanks very much for all help on this!

P.S. I also tried reseting the PCM w/ a friend's programmer, and even though I've had no SES light on, I had to clear a P0327 Knock Sensor code. What the h*ll... Is my car taking a dump on me? Any ideas?

Last edited by smgbad; 03-22-2009 at 06:39 PM..
smgbad is offline   Reply With Quote
Old 03-22-2009, 07:34 PM   #2
On The Tree
 
Trader Rating: 0
Join Date: Sep 2008
Posts: 119
Default

don't feel like your the only one. mine does the same thing. when you shut it off the oil pressure stays just below 40 and i got back out in the morning and its still right there below 40. no idea what the cause is, but i sure would like to know.
linebacker50 is offline   Reply With Quote
Old 03-22-2009, 07:38 PM   #3
On The Tree
 
smgbad's Avatar
 
Trader Rating: 1
Join Date: Dec 2008
Posts: 111
Default

still trying to figure it out... grrrr.. and also why the single knock sensor code went off but didnt throw an SES or Engine light... Now I don't know if they are related problems or if I should even drive it. I'm supposed to drive it about 30 miles from here on Tuesday for a custom tune and Dyno, but now I don't know if them revving the engine on a Dyno is the smartest move...
smgbad is offline   Reply With Quote
Old 03-22-2009, 08:35 PM   #4
On The Tree
 
Trader Rating: 0
Join Date: Sep 2008
Posts: 119
Default

not sure if it is a great idea to have it go to the dyno but i doubt that are oil pressure gauge problem is anything to worry about. i have had a check engine light for ever cuz of a bad cat and i get it checked once every 2 weeks just to make sure that there arn't any other codes. and nothing else has come up ( knocks on wood ). but i would get some input from someone about that knock sensor goin off.
linebacker50 is offline   Reply With Quote
Old 03-22-2009, 09:10 PM   #5
On The Tree
 
smgbad's Avatar
 
Trader Rating: 1
Join Date: Dec 2008
Posts: 111
Default

Thanks... I just want it to run correctly again. It seems every single time I fix something, it either breaks again within a week or something even more expensive breaks within a day or two. I just spent $1000 switching gears to 3.73 trying to make them quiet and they still whine like hell on accel after 3 sets of gears, a pushrod broke clear in half about 2 weeks ago and sent me into limp mode, my engine is making a very slight ringing sound from the valve cover, the knock sensor code is being thrown even though there is NO light which came on to even tell me about it (I had to find out by accident when I tried to reset the PCM), and now my oil pressure needle is all screwed up with no idea whatsoever on what may cause it or if my car is even safe to drive seeing how since the last two problems (which I don't even know if they are connected somehow) have showed up the exhaust sounds choppy on decel and at idle (although the idle itself seems fine). ::sigh:: Should I just give up and buy a minivan?

::side note... also got laid off week before last for the third time in 12 months. Not relevent but just throwing that out there for anyone who wants to feel slightly better about their lives. Hope it helps =o) ::

Last edited by smgbad; 03-22-2009 at 09:15 PM..
smgbad is offline   Reply With Quote
Old 03-22-2009, 10:46 PM   #6
On The Tree
 
smgbad's Avatar
 
Trader Rating: 1
Join Date: Dec 2008
Posts: 111
Default

refresh. Any of you super techs out there ever run into this?
smgbad is offline   Reply With Quote
Old 03-23-2009, 02:50 PM   #7
On The Tree
 
smgbad's Avatar
 
Trader Rating: 1
Join Date: Dec 2008
Posts: 111
Default

refresh.
smgbad is offline   Reply With Quote
Old 03-23-2009, 03:02 PM   #8
TECH Enthusiast
 
Trader Rating: 0
Join Date: Feb 2009
Posts: 664
Default

The gauge thing is probably nothing to worry about myself and and two of my other friends who all have V8 f-bodies I asked them and I know that my oil pressure gauge and theirs all do the same thing. We have had our cars for along time and drive them everyday without a single oil pressure related issue. The knock sensor code was probably a fluke I know that during normal driving you can sometimes get a knock and it will store that info. but won't throw a code it did it to me on the interstate a few months back. I saw it on my programmer checked for code there was one I reset it. And it hasn't done it sense. I hope this helps and you get your problem sorted out.
__________________
02 SS T-56 523rwhp totaled on 2-18-14
New Ride: 03 Z06 455rwhp 445rwtq
BigBirdLS1 is offline   Reply With Quote
Old 03-24-2009, 05:26 AM   #9
TECH Apprentice
 
02WS6SSZ71's Avatar
 
Trader Rating: 20
Join Date: Dec 2008
Location: KCMO
Posts: 337
Default


Both my cars are the same way with the oil pressure thing. Probably something along the lines of cutting power off to the sending unit while there is still pressure. As long as your car has good pressure when running, and reads zero with the car off but the key turned forward, you're in good shape.
As far as the knock sensor, I believe there typically needs to be a repeat offense for it to throw an SES code. The code stored on yours could be from hitting a pot hole or something of that nature...they are pretty sensitive.
Whoever is tuning your car would hopefully be better suited to explain the knock sensor issue. Good luck
__________________
'02 WS6
'02 Camaro SS
'96 WS6
'76 T/A
'91 T/A
'72 Nova
'70 Firebird
'70 LeMans
02WS6SSZ71 is offline   Reply With Quote
Old 03-24-2009, 09:55 PM   #10
On The Tree
 
WS6Power's Avatar
 
Trader Rating: 0
Join Date: Dec 2003
Location: Jacksonville,Fl.
Posts: 158
Default

It sounds like your oil pressure sending unit is going bad. It just controls your gauge not the oil pressure so your car should be OK to drive. The sensor is behind the intake a real pita to replace!
WS6Power is offline   Reply With Quote
Old 03-26-2009, 01:45 AM   #11
12 Second Club
 
McCs WS6's Avatar
 
Trader Rating: 2
Join Date: Feb 2008
Location: Chicago(Bridgeport)
Posts: 256
Default

not tryin to hijack this thread but would the sending unit cause the check gauges light to come on, the oil pressure drops to zero, and the car dies??
__________________
[/SIGPIC]01 Trans Am WS6... P&P Stock Heads, 224/224 114 Comp Cam,Ported Fast 92 Intake and Blue Maxx Throttle Body, SLP Underdrive, SLP Long Tubes, Magnaflow Catback, 3200 Vigilante,, 386rwhp, 410rwtq.. 06 TBSS My DD http://www.flickr.com/photos/25515686@N04/
McCs WS6 is offline   Reply With Quote
Old 03-26-2009, 01:45 AM
LS1Tech
Pontiac Firebird




Paid Advertisement
Reply


Tags
40, car, decel, dies, drops, gage, knock, ls1, off, oil, pressure, sensor, stays, throw, turned


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


 

All times are GMT -5. The time now is 08:11 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Advertising - Terms of Service - Privacy Statement - Terms of Service - JOBS
Emails & Contact Details