engine misses when turn on wipers & 4x4 - Diesel Forum - TheDieselStop.com
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99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the 99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 05-18-2011, 12:32 PM   #1 (permalink)
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engine misses when turn on wipers & 4x4

I have a problem where my truck dies for a second when I turn on my wipers or 4x4. It happens intermittently. I suspect the massive amounts of rain are getting something electrical wet.

Any ideas?

Matt
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Old 05-18-2011, 01:02 PM   #2 (permalink)
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yup theres a gem module driverside below windshield,its common to have weird electrical issues when water gets in due to a bad windshield seal.
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Old 05-18-2011, 01:03 PM   #3 (permalink)
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matt you should also fill out your sig so everyone knows what truck you have.good luck!!!!!!
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2002 f250 lariat 7.3 220k(motor has 190k)
original 4r100 tranny....220k and counting
knock on wood....
red elc good for 150k
4r100 1-2 2-3 3-4sonnax accumulator valves,.427 sonnax line pressure mod valve
4.125"yes thats 4 1/8" diy tymar intake(size matters...lol)
AIH delete,ccv delete,zoodad mod,
4" exhaust no muff
built my own leafs for 4.0 of lift!!!!!!
18" xd bronze revolvers with 325 nittos to wrap them
isspro pyro and boost guages on pillar mount....
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Old 05-18-2011, 03:01 PM   #4 (permalink)
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I am having rain issues too. Which module is it and is there a fix other then a new windshield?
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Old 05-18-2011, 03:11 PM   #5 (permalink)
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Quote:
Originally Posted by jpciron View Post
I am having rain issues too. Which module is it and is there a fix other then a new windshield?
The GEM module only exists on 99-01 trucks. It was replaced in '02 models by some other module (can't remember the name or exact location).

But the best thing to do is fix the windshield leak. If you don't it will probably take out any new module you install.
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Old 05-18-2011, 08:15 PM   #6 (permalink)
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An aftermarket CPS can cause the same symptoms, but it's the wipers not the rain.

Water getting in the CPS connection can do the same thing. It's worth taking a look.

Quote:
Originally Posted by klhansen View Post
The GEM module only exists on 99-01 trucks. It was replaced in '02 models by some other module (can't remember the name or exact location).

But the best thing to do is fix the windshield leak. If you don't it will probably take out any new module you install.
They called it the VSM (vehicle security module) and stuck it behind and below the radio starting in 02.
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Old 05-18-2011, 09:47 PM   #7 (permalink)
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HEY GUYS!!! I CHASED THIS FOR TWO SEASONS, ITS THE AFTER MARKET CPS!! The CPS reads RF signal and the wipers build a static charge & when they wipe, the charge goes off thus interfering with the CPS. I took the black one out & put a grey ford one in & no troubles since. What a headache this was but not now...
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Old 05-19-2011, 07:27 AM   #8 (permalink)
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SOB, I got stranded this winter with the CPS and put in a NAPA unit along side the road. Started having the trouble shortly after. Just using my wipers alot lately is prolly why I am noticing it with rain. I guess I will finally take it in for that recall........
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Old 05-19-2011, 08:53 PM   #9 (permalink)
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Yes, Mine died and I put a black Napa in & later that season in the rain it started, I pulled my hair out chasing this on my 99 F-250, finally an old ford guy told me to try the gray ford on, I changed it in the rain & bingo...gone.
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