Cruising on the interstate today at typical highway speed and I felt a couple sputters. About 10 seconds later I felt like power was fading so I got over to the shoulder. I tried to crank it and it felt like it wanted to go and would fire up for a split second and then just die. I have a spare coil pack in the trunk at all times so I tried all of them, no dice. While I waited for the tow truck I read a bunch of posts on fuel pump, fuel pump relay and ECM power relay.

When I got home I yanked out the fuel pump relay and swapped it out with one from AutoZone around the corner. No dice. I hooked up the laptop and got the following codes:

17536 - Fuel Trim; Bank 1 (Mult)
P1128 - 001 - System too Lean
17769 - Cylinder 3 Ignition Circuit
P1361 - 004 - Open Circuit
17772 - Cylinder 4 Ignition Circuit
P1364 - 004 - Open Circuit
17645 - Fuel Injector for Cylinder 1 (N30)
P1237 - 004 - Open Circuit - Intermittent
17647 - Fuel Injector for Cylinder 3 (N32)
P1239 - 004 - Open Circuit - Intermittent
17648 - Fuel Injector for Cylinder 4 (N33)
P1240 - 004 - Open Circuit - Intermittent
17646 - Fuel Injector for Cylinder 2 (N31)
P1238 - 004 - Open Circuit - Intermittent
17072 - ECM Power Relay Load Circuit
P0688 - 004 - Open Circuit - Intermittent

In looking around it seemed like the ECM power relay could be the culprit so I pulled it out. Until the dealership opens tomorrow and I can go grab a new one, I hooked it up to the multimeter. On 200 Ohm range, I get a reading of about 63 Ohm on the control circut and as best as I can tell from the Google, that's within an acceptable range of 50-120, albeit on the low side. When I powered the control circuit, I heard a click (good) but measured slight resistance from 30-87 and 30-87a (3 and 6 Ohm, respectively).

One other observation: when I finally got out there and yanked the ECM power relay, it had been about 6 hours since the car was running. I did try to crank it a couple times before pulling it but it seemed warm to me, relative to the ECM and other relays next to it.

Odds that this thing is cooked?