Oil pressure gauge on 1997 jeep wrangler 4.0 is coming in. shows no pressure at zero. changed sending unit, and filled oil to full but still is coming in. also when at 55 or higher mph, pressure is below 40#. could this be the gauge its self. engine makes no noise when showing zero. also temp stays about 220. anything to worry about.

did this, at temp and idle stays around 10#. what should i do next. did this, at temp and idle stays around 10#. what should i do next.

probelm by the sound of it ,if engine doesnt knock or rattle then its the sump off and renew the oil pump ,answering questions on fixya i have noticed that these jeeps do seem to suffer with oil pump problems ,drop the sump if you can and then check the gauze filter on the end of the pump if its clean then renew the oil pump but if its full of black grime which is caused by not changing the oil then give it a good clean and try it again as it wouldnt be the first time i have had this problem with quite a few different makes of car.I always recomend changing oil every 6000miles tops and a oil filter every third oil change and use the cheapest diesel/petrol oil you can buy ,these long life oils do not do a engine a lot of good probelm by the sound of it ,if engine doesnt knock or rattle then its the sump off and renew the oil pump ,answering questions on fixya i have noticed that these jeeps do seem to suffer with oil pump problems ,drop the sump if you can and then check the gauze filter on the end of the pump if its clean then renew the oil pump but if its full of black grime which is caused by not changing the oil then give it a good clean and try it again as it wouldnt be the first time i have had this problem with quite a few different makes of car.I always recomend changing oil every 6000miles tops and a oil filter every third oil change and use the cheapest diesel/petrol oil you can buy ,these long life oils do not do a engine a lot of good