I Screwed Up - Ford Powerstroke Diesel Forum
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post #1 of 8 Old 10-24-2013, 05:13 PM Thread Starter
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I Screwed Up

Selling my 99 250 V-10. I decided to give the engine bay some cleaning.

Sprayed Purple Power all over, then hosed it down with the engine off.
I started the engine and finished rinsing off the grime.
I used a leaf blower to dry it off with the engine running.

Now it doesn't run right.

It has a miss at idle and stumbles in gear at lower rpm.
Runs smoother at higher rpm above 3,000, but won't accelerate smoothly.
I drove it 40 miles on the hiway but no improvement.

Something got wet and wont dry itself out.

The air filter is dry.

Looking for ideas, don't want to pull every wire connection looking for water.

2013 F-350 Platinum 6.7 4X4 CC LB
2007 F-150 XLT 5.4 4X4 SC SB
1999 F-250 XLT V-10 4X4 CC LB
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post #2 of 8 Old 10-24-2013, 05:24 PM
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IIRC.... You have COP's right? I'm more of a Mustang guy than a diesel guy in terms of knowledge so if I'm remembering right then it's probably an easy fix as I did the same thing with my mustang............. Pull your coils. I'd bet money you have water up underneath them in the spark plug chambers and it's causing your miss


EDIT: Yes I just double checked you do have COPs. Time to pull em! Get the vacuum ready!

2000 F350 Lariat CC LB, 00 Mustang GT, 01 turbo Cobra

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post #3 of 8 Old 10-24-2013, 05:36 PM
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You definitely have water in the secondary system (high voltage spark.) You should be able to take off the coil packs and blow out the water with compressed air.

Allen
1999.5 F-350 7.3, six-speeed

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post #4 of 8 Old 10-24-2013, 06:17 PM Thread Starter
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Thanks guys, I will get on that tomorrow.

Having flashbacks of when I replaced the plugs, the back ones are hard to reach. At least I got a place to start. Much appreciated.

This is another one of those times I wished I had left well enough alone.
After it all dried under the hood, it hardly looks any cleaner.

2013 F-350 Platinum 6.7 4X4 CC LB
2007 F-150 XLT 5.4 4X4 SC SB
1999 F-250 XLT V-10 4X4 CC LB
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post #5 of 8 Old 10-24-2013, 09:08 PM Thread Starter
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Well I couldn't relax tonite so I pulled 2 front coils on one side and 1 on the other side. They were totally dry, no moisture anywhere.

Wondering if I should keep going with this as it gets tougher as you work toward the firewall. Seems like the front ones would have got the most water exposure.

I got it in the heated garage with a fan under the hood for the night.

2013 F-350 Platinum 6.7 4X4 CC LB
2007 F-150 XLT 5.4 4X4 SC SB
1999 F-250 XLT V-10 4X4 CC LB
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post #6 of 8 Old 10-25-2013, 04:16 AM
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I would pull all of the COP's and let it dry out.

2007 F250 Lariat Outlaw Edition-High Idle Mod,Sinister Coolant Filter
2001 Coachmen Royal 326RLS
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post #7 of 8 Old 10-25-2013, 12:21 PM Thread Starter
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Today I pulled all 10 coils.

2 back ones on the driver's side were wet.

I blew them all out with compressed air, then gave them a roasting with a hair dryer. Pulled the rubber boots off the leads.

I'll leave it all apart for a day to make sure everything is totally dry.

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1999 F-250 XLT V-10 4X4 CC LB
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post #8 of 8 Old 10-28-2013, 05:31 PM Thread Starter
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Thumbs up Problem Fixed

Just finished putting it all back together.

Sounds like it should now, nice and smooth, no problems.

Thanks again for the advice.

2013 F-350 Platinum 6.7 4X4 CC LB
2007 F-150 XLT 5.4 4X4 SC SB
1999 F-250 XLT V-10 4X4 CC LB
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