7.3 Powerstroke Runs Bad / Stalls In Rain - Ford Powerstroke Diesel Forum
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post #1 of 20 Old 05-28-2009, 08:22 AM Thread Starter
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7.3 Powerstroke Runs Bad / Stalls In Rain

Hello. We are an independent repair shop working on a 2001 F350 7.3 powerstroke. Vehicle came in with complaint of stalling and running rough only when rains or wet weather. Runs excellent when dry. We had codes P1316 IDM codes detected, P0273 cyl 5 injector circuit low, P0476 exhaust pressure control valve performance. We replaced #5 injector, passenger valve cover gasket and injector harness. Codes cleared except P0476. Had customer drive vehicle. Vehicle ran good until next time in rain. Rechecked codes, had codes P1316 IDM codes detected, P0273 cyl 5 injector circuit low, P0476 exhaust pressure control valve performance (all same codes from before). We replaced IDM and cleared codes, had customer drive vehicle again. Next time in rain problem recurred. Rechecked codes, had codes P0273, P1271, P1272, P1277, P1273, P1275, P0221. Found corroded pins at firewall bulkhead connector between engine harness and under dash harness. Replaced pins. Problem still persists. Customer has been patient but has spent $$$$ with us and has not seen any improvement. Truck is here now need resolution for problem. Please help.
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post #2 of 20 Old 05-28-2009, 08:28 AM
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the injector probably wasnt bad , either way , remove the idm and wrap it in a plastic covering and as much of the harness as possible , see what that does and let us know , ive seen moisture during rain do that

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post #3 of 20 Old 05-28-2009, 01:15 PM Thread Starter
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We have been trying to get to mess up all day (dry sunny day today). Have doused everything underhood with water hose. Could not get to mess up. When we did last go round with bulkhead connector sealed bulkhead connector and idm connector with 3M window-weld urethane. New IDM housing appeared pretty tightly sealed. We finally got to mess up one time while tech was wiggling harness at driver's valve cover (we only did passenger side). Messed up for a while and cleared itself out. Wiggled more could not get to do again. Would driver's side set injector code for passenger side? Customer has now picked up vehicle and will drive for a few days see how does.
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post #4 of 20 Old 05-28-2009, 01:26 PM
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Have you looked at the underside of that harness on the drivers side? Sometimes they will rest on the valve cover and wear away the insulation

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post #5 of 20 Old 05-28-2009, 01:51 PM Thread Starter
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Insulation looks good on harness on that side .. connector at valve cover gasket plastic is a little rough looking .. looking back now we probably should have done both sides at same time at least would have ruled it out .. we have asked customer to try wiggling driver's side connector if messes up again while they are driving it.
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post #6 of 20 Old 05-28-2009, 02:10 PM
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Originally Posted by SCUFFY828 View Post
the injector probably wasnt bad , either way , remove the idm and wrap it in a plastic covering and as much of the harness as possible , see what that does and let us know , ive seen moisture during rain do that
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post #7 of 20 Old 05-28-2009, 02:28 PM
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interesting problem,had this happen with Mazda Protege car,the computer was getting wet every time it rained ,it would run down the fire wall and get on/in the computer and eventually come through the fire wall

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post #8 of 20 Old 08-20-2009, 08:40 PM
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2001 Excursion stalling in the wet weather

I have an Excursion that is doing the same thing. It doesn't take much rain, sometimes not even really enough to get a mist off the road and it will stall. When going down the hiway it will die but, almost immediately relight so you get a cough really. In the city when your going slower it will just die and you have to slip it into neutral and restart real quick. If you find out what this is I would be interested to know. It's like the cam position sensor is going haywire but, only during wet weather.
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post #9 of 20 Old 08-21-2009, 07:27 PM
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My truck does the same thing. I've tried everything. Seems worst when it's just misting than when raining hard.
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post #10 of 20 Old 08-22-2009, 09:04 AM
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Stalling during wet weather

I was just on alldata and it seems that there is a recall out for the cam position sensor from model years 2000 to 2004 for a intermitant problem with the cam position sensor. I'm going to take mine in and see if it meets the criteria as I think this meets the symptoms. Has anyone tried replacing the cam position sensor?
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