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Old 06-28-2009, 10:24 PM   #1
rays
V6 - It just isn't normal
 
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Wacky Oil Pressure reading on 2LT

I've been noticing my oil pressure spike up to 65 to 70psi at times. Holds there for a few seconds then drops back down. Not under load or anything. Last time I noticed I was just backing out of a driveway. Is this normal? Anybody else seeing this? Its usually about 35 to 40 when driving. I've seen it spike up at random. Seems to be nothing to account for it.

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Old 06-28-2009, 10:31 PM   #2
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when cold? or warm?
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Old 06-28-2009, 10:42 PM   #3
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V6 - It just isn't normal
 
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Both. Did it cold backing out of a driveway. Just going down the road at normal speed after warm. I just noticed it yesterday but didnt think too much about it. Gonna keep a closer eye on it till I know whats up.
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Old 06-28-2009, 11:40 PM   #4
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wow thats odd. Mine only spikes up when its under load. You should maybe get that checked out
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Old 06-29-2009, 08:20 AM   #5
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At start up mine goes all the way up for about 20 sec. Once idle drops so does oil pressure. After that I have not seen it spike.
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Old 06-29-2009, 08:58 AM   #6
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I noticed mine spike a couple times too, though both times were when the AC was running. I still thought it was strange how it would be sitting around 40 then jump up to 65 for a few minutes and fall back down.
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Old 06-29-2009, 10:17 AM   #7
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Should be ok. I think they call it dry sump. Correct me if wrong.

The v6 actually is more technically advanced than the LS3 in some aspects.
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Old 06-29-2009, 10:55 AM   #8
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V6 - It just isn't normal
 
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Something to do with the oil squirters maybe? Someone on here, I think it was MadMaxx said that was a difference between the LY7 vs LLT. the LY7 didn't have them
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Old 07-01-2009, 01:21 PM   #9
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Mine does this (spikes up to 70psi) above 2K rpm until the Oil Temp reaches 180...
I suspect it is deliberately designed his way... (I hope so at least)
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Old 07-02-2009, 04:25 PM   #10
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yes mine to . 2lt rs cgm . think its norm car runs fine but did notice the spike.
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Old 07-02-2009, 04:52 PM   #11
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V6 - It just isn't normal
 
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Thanks for the input guys. Sounds like its a normal thing with you others noticing it too. Just wanted to make sure it wasn't just me. I guess its a lot better than LOW pressure now isn't it? Maybe with the amount of parts in the valve train they wanted to make sure it wouldn't be lacking oil. With more information (gauges) you get more questions.
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Old 07-02-2009, 11:59 PM   #12
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interesting
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Old 07-04-2009, 11:35 PM   #13
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Mine landed in the drive way tonight with 400 miles on it .We broke it in around Vancouver before we headed out on the highway. Took care all the way with varied speeds and RPM. All was well. Turned it off and 10 minutes later when showing our son the car we got an engine light, them we noticed the oil pressure under load tops out at the very end of the gauge in the cluster, but when you idle it falls to the mid range.

Check engine is on now after every start. No message on the DIC.

Checked the oil level....was down 1/3 qt.

What do I check next?
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Old 07-05-2009, 12:02 AM   #14
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V6 - It just isn't normal
 
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Hit the Onstar and ask them for a diagnostic. They will tell you why its on
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Old 07-05-2009, 12:24 AM   #15
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Quote:
Originally Posted by OUR72GTO View Post
Mine landed in the drive way tonight with 400 miles on it .We broke it in around Vancouver before we headed out on the highway. Took care all the way with varied speeds and RPM. All was well. Turned it off and 10 minutes later when showing our son the car we got an engine light, them we noticed the oil pressure under load tops out at the very end of the gauge in the cluster, but when you idle it falls to the mid range.

Check engine is on now after every start. No message on the DIC.

Checked the oil level....was down 1/3 qt.

What do I check next?
Yep....my engine light came on too. Mine had to do with fuel or vapor emissions or in other words the gas cap or vapor set my sensor off according to the Onstar diognogstic. I ran by AutoZone and had them reset it and it has not been on since. I am sure it will be something minor as these things are sooo sensitive. Let us know what Onstar says on the diognostic...would be curious if it was similar to my situation.
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Old 07-05-2009, 11:53 AM   #16
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It sounds like the sending unit is smoking crack.
Either that or something in the harness could be causing a voltage offset in the 5v ref or ground.
Oil pressure should follow rpm to the tune of ~10psi/1K rev. it should drop as a whole when the oil temp comes up. If your just running along and it's popping up and down without changing rpm, somthing is most likely wrong with the guage.

I dont think the oil pressure is e-controlled,nor do i believe the piston squirters are thermostatically controlled.
I could be wrong, havent been inside one yet.
Id hedge my bets on it being a electronic issue with the sender.
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Old 07-06-2009, 02:01 PM   #17
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Called Onstar. They have no alerts on my car. Said take it to a dealer.

I've used the local Pontiac dealer for service for 30 years. He advised he can NOT work on CAMARO. IT IS ON THE X LINES list. Chevy can't work on G8/Solstice.
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