Recently I purchased an E99 F350 with some issues I already knew about. I wrote up some about it when I got it in the E99 General section, but the issue I'm having now I think applies to all psd...that is the IDM.
I purchased AE shortly after I got the truck because I thought some of the injectors were shot. I had a noticeable miss at low to mid rpm range. I ran the buzz test but they all came back fine, instead I got these codes after running KOEO:
P1298 - Injector Driver Module Failure
P1690 - Wastegate Solenoid Circuit
P0230 - Fuel Pump Primary Circuit
I ordered a replacement IDM, but continued driving. My IDM issue became more serious when after driving for some time and getting the truck to fully warm up I would lose more cylinders and eventually stall, only to have to wait a few minutes, then fire up and get going again. From what I read this is a pretty classic sign of a bad IDM.
Meanwhile, I replaced the WG solenoid and that code went away. I also fixed an issue with the fuel pump circuit and lastly, ordereda rebuilt IDM (went up to the 120V from the stock 110V) from Davie in FL.
When the IDM got in, I popped it in place of the old one, reset the ECU (left the batteries disconnected overnight), and fired her up only to run just as rough as before.
Connected AE again and ran the buzz test. Again all 8 injectors buzzed fine and to me all sound the same. However, the test now returns multiple codes:
P0279 Cylinder 7 Injector Circuit Low
P0265 Cylinder 2 Injector Circuit High
P1277 Cy*linder #7 High To Low Side Open
P1293 Injector High Side Open - Bank 1
P1294 Injector High Side Open - Bank 2
Now I'm thinking I'm crazy, why the heck didn't I see this before? So I pop the old IDM back in only to get the old code P1298 IDM Failure and nothing else. Back to the new one and back to the new set of 5 codes.
Does this mean I had a bad IDM AND bad injectors? I think I get that the first 3 codes in the list are either bad injectors or bad wiring, but which is more likely? Also, what about the last two codes?
Next I run three of the KOER tests:
KOER Glow Plug test - PASS
KOER Cylinder Contribution test
P0284 Cylinder 8 Injector Circuit Contribution / Balance Fault
P0476 Exhaust Pressure Control Valve Range / Performance
Now this seems to suggest the problem is with cyl 8, not cylinders 2 and 7...I am so very
. I'd appreciate any advice very much.