I believe the oil sending unit was changed but its been a few months. I will have to call them tomorrow to see if they actually did.

From what I have read the oil pressure sending port that is not used on the engine anymore is just above the oil filter on my 96z28?

http://shbox.com/1/aux_oil_port.jpg

Say its not the sending unit. Whats my next step?

 

Haven't had a chance to talk to the shop about the oil sending unit but I talked to another mechanic. Thats 3 now, they all say its the oil pump and they have seen this very commonly on these years of camaro's. So my plan is to take that advice and everyone elses and work with it.

First going to change oil pump.
Second, if not cured, doing the cam and bearings haha
Third - bottom end bearings...

Can the cam be removed while the engine is in the car?
I read shoeboxes info but not sure if the engine needed to be lifted. Between that and Haynes, sounds like the engine can stay in the car.

Side note: I will try and take a vid of what it is doing with my camera, then post it via my web site...

 

My site says nothing about lifting the engine for a cam change, because it does not have to be. You are trying to read something into it that is not there.

You cannot change cam bearings with the engine in the car. If you are going to do any bearings, removing the engine is the correct way.

 

Let me clear this up, what I meant is I didn't see anything in your writting that said anything about lifting the engine. I was just assuming that I didnt need to since you didn't say anything about lifting the engine that I read.
Sorry about that..

So cam can be done without lifting
Cam bearings, have to remove engine. ouch

 

One more note to add, when the oil pressure first was noticed was out of no where it dropped one day sitting in a drive thru. Ever since its been getting worse. The idle sits at maybe 500 (half way under the 1) and oil in the red. Once the car is really warm from driving for a while... over a hour... the oil pressure drops immediately when you come to a stop! I have lots of weird noises under the hood. Sounds like its rockers, hopefully will be pulling valve covers and adjusting rockers and doing oil pump this weekend.

Another weird thing to add, if I throw it into nuteral (automatic) before I come to a stop, the tack stays a hair under a thou rmp and does not touch the readline....

 

Hey, is there any good step by step instructions on changing a oil pump? Do I really have to lift the engine 3 inches to get the pan off?

 

UPDATE: I put a new oil sending unit in and it read exactally the same. This is not good at all...


As I was looking, the shop I originally took it to said they had to replace the oil sending unit wiring but it looks kinda nasty! (keep in mind I had this problem before the changed the wiring)

Here is my harness, is there missing wires? Did they cut wires that shouldent have been? Im off to do some research on shoeboxes site lol.

 

According to shoebox's pic on his site it is right, only one wire.

 

Okay Im on a bit of a tight budget and need some input. Im not sure wither to....

1. Buy a gauge and test the oil pressure
2. Take off the oil pan to check the oil pump and pickup.
3. Or worse comes to worse, pull the engine which Im almost ready to do if I had the place to do it, and replace cam bearings. I dont think it is cam bearings, might be bottom end bearings?

What do you guys think? How do I diagnose this, Need input.

Oxy

 

ttt... anyone?

 

start with a gauge, then go from there, that my $.02

 

I think you just have an idle problem.

When you check your oil pressure, check it while in N

 

It all happened suddenly one day and now its all the time when the engine warms up. I was wondering about the idle too but Im not sure if that is it. If I put it in nuteral, I still have to hold the gas a bit to bring it up to 1000 rpm from 600rmp to barely stay over the red. I dont think thats normal?


maverickmk, that was probably going to be my next step. I have a friend with a gauge but do you know the size of fitting that does on there?

 

you need to stop driving the car until you figure out whats wrong. if the sending unit doesnt fix it drop the oil pan. take out the two motor mount bolts and jack the engine up a few inches. remove all the pan bolts and replace the pump and the oil pump driveshaft. replace it with an all metal one. high pressure pump is fine, NOT a high volume one. if that doesnt fix your problem then its time for a rebuild of some sort.


right now by running the engine your doing more and more damage. and if your hearing noises already then your engine is probably f'd up

 

so, maybe your issue is when the PCM goes into Closed Loop operation