What is wrong now? Oil Pressure issue

mdost03 · 10-20-2008

---WILL HAVE A VIDEO UPLOADED SOON---

Alright, issue started when we went on the fall cruise. While driving I was noticing that the oil pressure was reading a bit lower than usually, but still within the "safe" parameters (10psi OP = 1000rpms). Figured the gauge was crapping out as it was an Autometer Pro-Comp Ultra-Lite. Car ran fine even with the issue.

Finally got a new ProSport Oil Pressure gauge and hooked it up and it still is reading low :/

Cold start it reads around 20 psi at idle (around the same as the Autometer read) instead of the usual 60-70 I was seeing before. After it warms up, the car barely reads oil pressure anymore on the gauge and by revving it, I can max out the gauge (100psi). Seems to idle and everything fine still.

Background:
-Oil Level is fine according to dipstick
-Oil relief has been ported on the oil filter housing (did this many months ago and never had any problems, max oil pressure I saw when doing a WOT pull was 80psi or so)

My old Autometer gauge never maxed out over 100 when revving up the engine, but this new ProSport does.

Anybody have any ideas? I am so fed up with the car and it's problems, I am about to sell it.

Matt D. · 10-20-2008

Are these mechanical or electric oil pressure gauges?

mdost03 · 10-20-2008

Electrical, ProSport one is brand new from MAP.

turbotalon1g · 10-20-2008

I don't like these new ones, early reviews showed there were chauncey.

But lately i have seen a lot of good reviews.
Check your connections, If it they are good it will mess up your readings.

mdost03 · 10-20-2008

Here's the video:
http://www.youtube.com/watch?v=SNeSRGKeXSQ

Kevin 1G Drummer · 10-20-2008

I hate my prosport gauge. The sender crapped out after only 2 months of use. It also pegged out at anything above 4000 rpm. Also, it did the same thing as your's at idle where it would just drop to 0

mdost03 · 10-20-2008

Sooo..... should I worry about my car f-ing up?

dsm9sec · 10-20-2008

Quote:

Originally Posted by totaleclipse_05

Sooo..... should I worry about my car f-ing up?

You could try taking off an oil line (not to anywhere important) at idle and make sure at least something's coming out.
(make sure there's a bucket under and you don't have it off for longer than a second)

But chances are your oil pressure is fine. My Stewart Warner use to act funny and didn't run smoothly, it always jumped. But my oil pressure was more than good as Shane and his dyno knows.

EclipseGST · 10-20-2008

Quote:

Originally Posted by dsm9sec

You could try taking off an oil line (not to anywhere important) at idle and make sure at least something's coming out.
(make sure there's a bucket under and you don't have it off for longer than a second)

But chances are your oil pressure is fine. My Stewart Warner use to act funny and didn't run smoothly, it always jumped. But my oil pressure was more than good as Shane and his dyno knows.

Dont do that... Oil will spray everywhere. Why not just get a mechanical oil pressure tester gauge like this. Check oil pressure with it and if it is fine, replace the electronic gauge inside the car.

http://www.wescotools.com/p-12670-kd...re-tester.aspx

Autozone might even have one to rent, someone on here might have one as well. I do but I'm 2hrs away or I'd let ya borrow it.

Matt D. · 10-20-2008

Sounds to me like your oil pressure sensor sucks. Try a different one.

turbotalon1g · 10-20-2008

^lol.
Another i thought of watching your video. IF you hold the motor at 2000rpm oil pressure should be 40psi. That is usually my little test if i am scared.

My SW gauge does the same thing, it doesn't move smoothly but i know its sensitive to being grounded good.

EclipseGST · 10-20-2008

Just thought of something, I didnt see it posted but did you replace oil pressure sensor when you replaced the gauge?

mdost03 · 10-20-2008

Quote:

Originally Posted by EclipseGST

Just thought of something, I didnt see it posted but did you replace oil pressure sensor when you replaced the gauge?

Yes, took out Autometer gauge+sender and install ProSport gauge+sender.

I'll have to ask my autoparts store if they rent out oil pressure testers, but doubt they do. Hopefully they aren't too expensive then.

**Kracka** · 10-20-2008

Whats your stock gauge show and is the warning light on? If both gauges are reading the same I doubt its the pressure sensor, but if you conclude that it is contact ProSport and get a new one from them (they have a 1 year warranty).

FattyBoomBatty · 10-20-2008

What oil filter? If Fram, throw in garbage, replace with wix/equivalent.

**Kracka** · 10-20-2008

OEM Mitsu only for my cars. A quality filter can make a big difference.

mdost03 · 10-20-2008

I used a Napa Gold filter this time around, used Mobil 1 before.

Hughes, I don't have the stock sender hooked up, I took that one out and ran a tap for NPT threads and just screwed the new sender into the housing.

turbotalon1g · 10-21-2008

I use napa gold too. OEM ones tend to leak for me.

**4seasons69** · 10-21-2008

I have a mechanical oil pressure testing gauge. you could come over sometime and we could check it out or I might be able to come to you sometime.

mdost03 · 10-21-2008

Quote:

Originally Posted by 4seasons69

I have a mechanical oil pressure testing gauge. you could come over sometime and we could check it out or I might be able to come to you sometime.

Where do you live?