I have a 1978 Ford Ranger F-150. It has stood without being started for

[billyshears]

about 5 years. Why no compression? I have removed heads and checked pistons. All appear to be in good shape. All fluids appear to be ok. Any ideas?

 

[idontgivafork]

ive never seen a ranger f150,but i believe thats a mazda engine and if it jumps time, it could not build compression.its either a 1.8 or 2.2 correct?

 

[Ron G]

Are the valves stuck open? If the pistons are ok and the valves are working, you should have compression. Either the valves or the rings are stuck.

 

[Jeff]

rods/valves could be frozen. top of the engine needs oil, if car sat for that long, oil dried up long ago

 

[SVOMAN]

if it ran when parked, the rings are stuck and need to be soaked in some kind of rust buster and degunker like Marvel Mystery Oil..

 

[LeAnne]

No compression can be caused by valve timing. It's unlikely that the pistons or all of the valves are bad enough to cause no compression in all of the cylinders. Pull the front cover off.