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Need Glow plug help Not sure where to post
Hi all, it is another cold start issue and I really need some help! Please move this post if needed.
So here is the run down. I have a 2002 E350 van with a 7.3 with 85,000 miles. I have only had it a couple months. I have only driven it home and parked it, about 90 miles. I live at 3000 feet in the Sierra and it has been getting down in the twenties. It runs fine. It will start after about 10 seconds of cranking, and only if the batteries are freshly charged. It won’t crank for more than 10 seconds without slowing down. Pretty sure this is California equipped.
Batteries are new and charged, all terminals and grounds cleaned.
Starter is about a year old
No power (and no click) from the output side of the GPR with KOEO. I replaced the GPR and same thing.
There is power at the input (big wire) of the GPR. There is also power at the small terminal (small red wire) with KOEO.
Here is the weird thing, the other small terminal (purple wire) is grounded with key off, with key on, when it should complete the circuit and trigger the GPR, it is no longer grounded!
So I put a jumper wire on the small terminal (ground side) of the GPR and grounded it out (for less than a minute). When I did this with the KOEO the GPR clicked and the output terminal had power. So I am thinking there is a problem with the Glow Plug Controller? It did start when I did this, a little faster I think, but is warmer today 45-50. A side note, after doing this and starting it the check engine light is staying on.
I think my glow plugs are bad also but I am not sure. I pulled the connector on the passenger side and did the OMH check. All 4 zeroed out. I tested them 3 times to make sure, and I think I am doing it right. Didn’t check the other side yet because I wanted to get some advice, and remember this is a van! No room to work, can’t see what you are doing and you have to take lots of stuff off to get to anything. All 4 bad, is that likely?
If the glow plugs have not been getting power for a while can that make them go bad? Will they carbon up and have infinite resistance? Can they come back to life if they start getting power? Am I on the right track with the glow plug controller? Should I take it in and have them run the codes?
2002 E350 Super Duty 15 Passenger Van
We use it for our student field trips.