Okay, I brought this 245DL home last weekend, it wouldn't run. Owner said it had an intermittent problem, but it wasn't intermittent for me. Wouldn't start. Until I pulled an injector, and tried the starter, and it sprayed. Reinstalled injector, and it started on one cylinder, and would eventually rev but only fire on cylinder #1. Checked #2 plug, dry as a bone but had spark and compression.

So today, before I went looking for fuel pumps, I pulled #2 injector, and tried starter. Presto, it sprayed. reinstalled it, now it runs on two cylinders. What the....? So I pulled #3 and #4 and ran the starter and they sprayed. Reinstalled them, and now it runs like the day it came off the production line even with 280K.

Explanation? I don't know for sure, but here's a theory: There was some air in the injector lines, and was at the highest point just above each injector. Since air has give unlike liquids, it didn't create the hydraulic pressure necessary to spray through the injector. When I removed the injectors, the highest point was then the end of the injector, and the fuel pushed the air out. I don't think I buy this completely, but I put 25 miles on it today without a hiccup.

Any other ideas?