Listen guys I have had my 1998 Z28 in my garage sitting due to a oil pressure reading of zero. So today I fire it up for the first time in a long time and the pressure reads zero. After I shut the car off the gauge raises to normal levels with the are and electronic system being off. I replaced the sending unit and it changed nothing. About a month before the car was placed in the garage on a stand still due to the reading being zero I had problems with acceleration. I was driving it and it had seemed to bog down at weird times. I would drive it and try to step on it and it would almost conk the engine out. But I was able to restart it and get it back home. This was RIGHT before it had the oil pressure gauge drop to zero. I am wondering if it is the gauge itself or actually the oil pump. Seeing as when I had shut it off after the initial start and the gauge would rise to normal specs. Is it the gauge or the oil pump?

 

dude even more weird. I just started it and now all the gauges are fine and everything seems good. Is this a gauge issue?

 

My .02.

sounds like electrical/guage related. a mechanical pump isn't going to work intermittently.

Plus if it was driven with 0 showing on the guage (and it was accurate); the bottom end would be toast (if you ran it much that way.)

get a mechanical guage on it, before it is toast. someone else can chime in as to what to remove so you can hook one up.

 

Actually it was never driven once the gauge had dropped to 0. I replaced the sending unit because I though possibly that could be it and it turns out it wasn't. But after I initially had parked it after I was driving it and it bogged down on me and actually had stalled a few times it sat for a bit. Then I went out and started it one day and the gauge read 0. Only after that did i start it briefly a few times to check to see if the gauge was reading. The battery remained dead as well as the car for about 2 years. Until yesterday when I fully charged the battery and started it real quick and the gauge was fine. So I guess the big question is where do I even start to diagnose the issue? Also what tools and where can I acquire them to diagnose the issue.

 

a multimeter or go with power probe 3 master kit
http://www.freeautomechanic.com/wiringproblems%206.html