Hi, We bought a cooper s turbo 2007 from a local person and it run ok for 4 days and then went onto 3 cylinders.
We have since discovered it has low compression on No4 cylinder and the fuel will not ignite even though it has spark.
On removing the rocker cover and also replacing the coil packs...
I've been pulling my hair out trying to figure out what's wrong with it.
I get the misfire in cyl 4 code p304
Also a lean code as well
Cam sensors (both)
VVT solenoid Front one (changed oil, Mobil 1) The solenoid was really bad, diaphragm was shot and...