DTC P1316. Need help!
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I re-ran the KOEO test and no DTC codes are being detected now. Since I'm only getting the P0603 - Power Train Control Module Keep Alive Memory KAM error when running the continuous memory test, what does this really mean?
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Well, I'm back to square 1. I attempted to drive the truck yesterday and didn't even make it down the driveway when, like turning turning on a light switch, the service engine light came on and it's running like crap again. Not sure where to go from here since this problem is so intermitant. I guess I could bring it to the dealer. But, we all know how much that cost.
Logistics Pro
Joined: Jul 2009
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From: Lansdale, PA
OK, Ill post it again..
I had a very similar issue with my truck and it was the Under Valve Cover Harness that came unplugged a little. It caused the EXACT issue you are describing.
here is a video of how to fix the issue IF it is the uvch that is the issue.
http://www.youtube.com/watch?v=tL5_xYcZe3E
I had a very similar issue with my truck and it was the Under Valve Cover Harness that came unplugged a little. It caused the EXACT issue you are describing.
here is a video of how to fix the issue IF it is the uvch that is the issue.
http://www.youtube.com/watch?v=tL5_xYcZe3E
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I like the Quarter trick...very cool. Eventhough I just replaced the vc and uvc harness, I'm going to pull off the pass side vc again this morning and check it out. I'll slide the quarter in there for extra measure.
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Pulled the pass side vc off and the harness did not come unplugged at all. I ohmed out all the injectors again through the pass through connector and they are all still showing 3.1 ohms. I pushed on it connector just to be sure but it didn't move, its all the way connected.
So, if my IDM is good, wiggling all the injector wires doesn't show any changes, verifying twice that the harness is not coming unplugged.............WTF could be causing the open circuit to Bank 1?
So, if my IDM is good, wiggling all the injector wires doesn't show any changes, verifying twice that the harness is not coming unplugged.............WTF could be causing the open circuit to Bank 1?
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Fleet Owner
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From: Rio Rico, AZ.
Pulled the pass side vc off and the harness did not come unplugged at all. I ohmed out all the injectors again through the pass through connector and they are all still showing 3.1 ohms. I pushed on it connector just to be sure but it didn't move, its all the way connected.
So, if my IDM is good, wiggling all the injector wires doesn't show any changes, verifying twice that the harness is not coming unplugged.............WTF could be causing the open circuit to Bank 1?
So, if my IDM is good, wiggling all the injector wires doesn't show any changes, verifying twice that the harness is not coming unplugged.............WTF could be causing the open circuit to Bank 1?
All the way to the IDM if necessary.
You've pretty much eliminated any possibility of the problem being in the injectors and/or the wiring harnesses inside the valve covers.
The center wire is the injector ground wire and if the whole bank is going down, a break in the circuit would kill that side.
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I did ohm the center wire to the 42 pin connector and from there to the IDM wiggling extensively and did not see a break in the connection. Also, if I'm getting a constant 1.33v on the center wire with the key on, and wiggling the wires all the way back to the IDM does not change the voltage at all, how could it be a break on the center wire?
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Does anyone know if a 2002 IDM would work in my early 99? I would like to rule out the slight chance that I may have two bad IDMs (The factory unit and the reman unit I bought). A friend of mine has a 2002 F250 and since the swap is simple, I thought I would give it a shot.
Fleet Owner
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From: Rio Rico, AZ.
I did ohm the center wire to the 42 pin connector and from there to the IDM wiggling extensively and did not see a break in the connection. Also, if I'm getting a constant 1.33v on the center wire with the key on, and wiggling the wires all the way back to the IDM does not change the voltage at all, how could it be a break on the center wire?
Just trying to help, but running out of ideas to present.
Corrosion on the plug?
Post Fiend
Joined: Mar 2007
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From: Texas
Did you check the other wires between the valve cover and IDM or just the common wire?
An injector solenoid would still a possibility if it's having intermittent problems since a bad solenoid can cause the IDM to shut down the entire bank. If you can get to a point where the problem will come back soon after clearing the codes, then you can try unplugging one injector at a time, clear the code and start. If leaving one of them unplugged only leaves you with one cylinder down instead of all 4, then you can swap that solenoid with the one next to it to narrow down if it's a solenoid or wiring issue.
We've either overlooked something here or it's time to start throwing out possiblilites and discussing them since DTC's and the manual isn't getting us anywhere on this.
An injector solenoid would still a possibility if it's having intermittent problems since a bad solenoid can cause the IDM to shut down the entire bank. If you can get to a point where the problem will come back soon after clearing the codes, then you can try unplugging one injector at a time, clear the code and start. If leaving one of them unplugged only leaves you with one cylinder down instead of all 4, then you can swap that solenoid with the one next to it to narrow down if it's a solenoid or wiring issue.
We've either overlooked something here or it's time to start throwing out possiblilites and discussing them since DTC's and the manual isn't getting us anywhere on this.
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I think I might be making some headway. I changed my factory IDM back out with the reman unit I bought. The truck ran exactly the same as expected. However when I run a KOEO test I'm now pulling the DTC code P0273 Cylinder 5 Injector Circuit Low. If the cylinder 5 injector is indeed bad, how can I tell for sure?