Re: Bronco ii no oil pressure
Here is a little more history my buddy authored that might have a clue...
The 1987 Ford Bronco II with the 2.9 fuel injected 6-cylinder died while warming/idling five years ago. When the engine wouldn't turn over with the starter the spark plugs were removed. The number 6 cylinder was hydro-locked and thus the starter would not crank the engine. The engine was remove and stored. The injector, intake manifold and heads were likewise removed.
I recently acquired the Bronco, replace the heads with newer 1988 heads, installed new hydraulic lifters and reinstalled the intake, injector, accessories and installed the engine. Unaware of the previously hydro-lock issue I attempted to start the engine. The starter would not crank the engine. I remove the spark plugs and the number 3 and number 6 cylinders were gas hydro-locked. Realizing I had two injectors stuck open I replaced all 6 injectors. The engine still hydro-locked on cylinders 3 and 6. I then replaced the ECU and the engine cranked, started and ran. The issue now is the engine doesn't have any oil pressure. I pulled the distributor to insure that the distributor is engaging and turning the oil pump and yes that appears to be working correctly. When the pump is turned clockwise the proper direction by hand it gets harder with a revolution appearing to be operating correctly. I have never experienced a gas hydro-lock engine and I am now wondering if the hydro-lock could have plugged a line or something thus causing the oil pressure issue. My understanding is that the engine did not have an oil pressure issue five years ago when the first hydro-lock occurred. I certainly would appreciate any and all help with the no oil pressure issue.