I have a 2002 Mazda Tribute LX, 3L Engine, with DOHC. It stopped running awhile back and hasn't run since then. I did a spark test on it and found that all six cylinders were getting a spark. I tested the fuel system and the fuel pump was pumping fuel. After doing a compression test on all six cylinders I discovered this:
Cylinders #1 & 2 had 30 psi.
Cylinder #3 had 37 psi
Cylinders #4 & 5 had 0 psi and
Cylinder #6 had 150 psi which is what I've been told is the correct compression for all six cylinders.
My questions are:
Does the 0 psi of cylinders 4 & 5 indicate a blown head gasket between those two cylinders and possible broken valves or not?
Also do the low compression readings in cylinders 1, 2 and 3 mean valve damage or a blown head gasket also?
I am a automotive tech student with limited diagnostic experience and I could really use some expert input. I really need to repair my vehicle and get back on the road. Any help that anyone qualified to comment on my dilemna will be well appreciated.
have the same problem?
Thursday, January 6th, 2011 AT 3:43 AM