Engine Mechanical problem
2000 Jeep Wrangler 6 cyl Four Wheel Drive Automatic 131000 miles
I have a 2000 Jeep Wrangler Sahara with 4.0 L inline 6, about 130,000 miles on it. When starting the jeep when cold the oil pressure reads 40. When going for a while it reads a little above 20 on the freeway and around 10 in town. At an idle, like when stopping at an intersection, it goes to zero. The check guages light comes on when it gets to zero. Once I get going again the oil pressure goes back up from zero. There is no noise or vibration. The vehicle has not lost a drop of oil since I noticed the problem. I have also had to put lots of coolant in the radiator since it is often running low, but I cannot find an external leak and am 99% sure there is not one. I am reasonbly sure that water is not getting into the oil. The temperature never goes over the midpoint on the guage and I have driven it over extended distances. I do not know if the problems are connected or not. When noticing the oil pressure dropping to zero, the first thing I did was changed the oil pressure sensor. When that proved not to be the problem I sought the help of a mechanic that thought it best to change the oil pump. So I did that, but there was absolutely no change. I had a mechanic connect an external oil guage up in place of the sensor and his guage confirms zero oil pressure at an idle. I am at a complete loss and in need of help.
have the same problem?
Tuesday, April 13th, 2010 AT 7:51 PM