I once had a head gasket blow direct between cylinder and outside in an old Rambler inline 6, and it made a loud snapping noise. No such noise here. Where could the leak be and how could I detect it?
All three ECU ground wires (EO1, EO2, EO3) are less than 0.1 ohm to vehicle ground. I checked the distributor sensor and crankshaft position sensor wiring and all good. The sensor coil resistances are 2070 ohm for the crankshaft sensor and 165 ohm for the distributor coil and are in spec. I will do a few more checks of voltages between the ECU ground wires EO1, EO2, EO3, E1 and the OX sensor ground wire to see if any bias exists with the engine running. I don t expect to find any.
Other than that, I am out of ideas to check without a scope. I need a scope to check the injector timing and durations, the crankshaft position sensor signal, the distributor signal, and the igniter drives from the ECU.
I want to make sure I don t tear down the engine unnecessarily.
I'm stumped and still open for suggestions.
Sunday, January 29th, 2012 AT 8:14 AM