pontiac 6000 oil pressure

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when going down the highway lots of oil pressure, city driving it drops low then to zero but doesnt make any lifter noise or weird sounds or anything, get back on the highway and within 5 minutes the gauge is climbing again, anyone have any ideas??? Oil pump or sending unit?

posted by  fordman86

most of my experience has been on gm products and 1 thing i have learned is even though the v8 and v6's (pre 90's) are simple they tend to be a little finnike (touchy) even the slightest change in oil pressure fuel pressure vacum ect tends to p*** it off. your temporary setback is very unique indeed i would attach a pressure gauge in place of the sending unit in order to recieve a DIRECT reading from your oil pressure while car is at idle it should read about 30 lbs (i think.. check specs to make sure) if it shows any unusually low readings and/or fluctuations it is your oil pump if the readings are consistant and nominal it is your sending unit i hope this helps

posted by  spearthemechani

Thanks, that is tomorrow's plan, just wondered if GM people had heard of this one, I know in a ford either the gauge is messed up or your lifters are makin alot of noise, thanks again

posted by  fordman86

anytime :thumbs:

posted by  spearthemechani

going to call GM and a parts supply store see if they have heard of this problem before, I know I havent seen it and it is scary in the big city of Calgary when your gauge goes to zero in rushhour traffic, just a little panic sets in, lol; anyways thanks again :clap:

posted by  fordman86

rotflmao yea id imagine calgary is a bit chilly this time of year and loss of oil pressure would put a damper on things that is why i stick to the south-west US not much cold stuff around here heck i was workin on my car today without a shirt on :smoke: lol
normally when u lose oil pressure on gm motors the lifters chatter so if your not chattering 9 out of 10 says u have a faulty sending unit
:smoke:

posted by  spearthemechani

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