01-27-2015, 11:50 AM
I was not able to get the engine hot, since it won't run, so the engine was cold with the poor compression. The throttle was full open while testing, fuel relay was pulled, battery was fully charged (also new), and all spark plugs were removed. We let the compression needle peak and checked each cylinder 3 times. The cylinders average compression were #1=105psi, #2=100psi, #3=105psi, #4=110psi. One cylinder at a time I added some oil (~3mL) and rechecked the compression, the compression did not get any better. I checked the engine oil and it looks normal without any coolant, so my guess is the valves or valve lash. Any thoughts?