68rockcrawler
Bronco Guru
- Joined
- Sep 18, 2006
- Messages
- 1,417
I hit some pretty deep water last time I was out wheeling and it killed my Bronco. It ran fine for about 20 minutes after the water crossing but after that it started running rough and dying on me. It felt like it had a clogged fuel filter but that would be way too simple! Now it also has no spark and won't run at all, but it turns over good.
Here is what I have found after lots of diagnosing and researching:
1. Very low fuel pressure at the fuel rail. I'm guessing only a couple of psi.
2. 12 volts going in to the MSD offroad ignition box, but no voltage coming out of the ignition box.
3. 0 ohms of primary resistance across the coil and 2.9 ohms secondary resistance which is way lower than it's supposed to be. I have an MSD coil.
So, is it possible this water crossing killed my fuel pump, ignition box and coil all at once?
Here is what I have found after lots of diagnosing and researching:
1. Very low fuel pressure at the fuel rail. I'm guessing only a couple of psi.
2. 12 volts going in to the MSD offroad ignition box, but no voltage coming out of the ignition box.
3. 0 ohms of primary resistance across the coil and 2.9 ohms secondary resistance which is way lower than it's supposed to be. I have an MSD coil.
So, is it possible this water crossing killed my fuel pump, ignition box and coil all at once?