Having a lot of issues, need to get to the bottom of this - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 06-19-2014, 05:44 AM Thread Starter
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Having a lot of issues, need to get to the bottom of this

Okay so im gonna list all my problems in a chronological order,

First, in the winter, a loud buzzing noise started when turning the key to the wts position, this noise still occurs, just not when the truck is still warm.

Next, lights are dimming when going down to an idle, then brighten when rpms get above 1k

Then, o/d light started flashing, had a slip only when i powerbraked the rpms up to around 1200, then let it back to an idle and then drove.

Transmission was rebuilt, same problem, but diffrent code being shown.

The same thing above happend about 3 times, same problem, diffrent code.

The slip only occurs when the trans is in drive, not when in 1 or 2.

Also occurs very frequently in 4x4, much more then 2x4.

My trans is under warranty, but the guy really isint sure whats wrong so he just keeps replacing the sensors. He said his next try is to look in the drum.

Also, now when the o/d light flashes and i shift into neutral or park, it goes into high idle for 2-3 seconds.

So my question is, does anyone have any idea what may be wrong? Im tired of going back and forth to the tranny shop.

Early 99 F-350 4x4
-TS 6 Position Chip
-6637 Intake
-Diamond Eye 4" Turbo Back Straight Pipe
-33" Nitto Trail Grapplers on 18" XD Diesel
-2.8" Leveling Kit
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post #2 of 12 Old 06-19-2014, 09:06 AM
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I am not sure about the other issues you are having but the lights dimming seems to be your alternator is on its way out. I would have it tested or monitor your voltage while your driving.

Now I may be way off but if you are having electrical power issues this could be causing the other problems that you are seeing. If the PCM and and other sensors are not getting the proper power then the signals could be getting corrupted and causing issues.
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post #3 of 12 Old 06-19-2014, 10:08 AM Thread Starter
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Thats kind of what im thinking.

Early 99 F-350 4x4
-TS 6 Position Chip
-6637 Intake
-Diamond Eye 4" Turbo Back Straight Pipe
-33" Nitto Trail Grapplers on 18" XD Diesel
-2.8" Leveling Kit
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post #4 of 12 Old 06-19-2014, 10:09 AM
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i agree with will.
start with the charging system and make sure everything is working.

all the electronic crap doesnt work coreectly when not getting enough power.

heck my dang quad wont even run if the batteries low

99.5 f250 7.3 4x4 255k
PHP Phoenix, S&B, 4" Diamond Eye, Hpx, Stancor, RR Billet Wheel, RR AIH Delete, Autometer Gauges, Pro Comp leveled, Transgo Tugger, Billet TQ Converter, Warn Hubs, Int'l Up-Pipes, RR IC-Boots, Non-Ebpv Pedestal, High Flow Outlet, Hucorey's HPOP Lines, RR High Flow Fuel Fittings, RR OCR, Barder 360 Thrust Kit, 08 Tow Mirrors.

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post #5 of 12 Old 06-19-2014, 03:24 PM Thread Starter
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Should i just start voltage testing things?

Early 99 F-350 4x4
-TS 6 Position Chip
-6637 Intake
-Diamond Eye 4" Turbo Back Straight Pipe
-33" Nitto Trail Grapplers on 18" XD Diesel
-2.8" Leveling Kit
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post #6 of 12 Old 06-19-2014, 04:48 PM
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check the grounds/ positive cables.

how old are the batteries? possible bad cell?

check alternator output.

99.5 f250 7.3 4x4 255k
PHP Phoenix, S&B, 4" Diamond Eye, Hpx, Stancor, RR Billet Wheel, RR AIH Delete, Autometer Gauges, Pro Comp leveled, Transgo Tugger, Billet TQ Converter, Warn Hubs, Int'l Up-Pipes, RR IC-Boots, Non-Ebpv Pedestal, High Flow Outlet, Hucorey's HPOP Lines, RR High Flow Fuel Fittings, RR OCR, Barder 360 Thrust Kit, 08 Tow Mirrors.

Dad-2000 7.3 108k miles, Autometer Gauges, Superchips 1705, RR AIH Delete, 6637, 4" Diamond Eye, BD Billet Wheel, TruCool Max
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post #7 of 12 Old 06-19-2014, 04:52 PM
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ALTERNATOR LIKE THEY SAID
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post #8 of 12 Old 06-19-2014, 06:18 PM Thread Starter
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How do i check alternator output?

Early 99 F-350 4x4
-TS 6 Position Chip
-6637 Intake
-Diamond Eye 4" Turbo Back Straight Pipe
-33" Nitto Trail Grapplers on 18" XD Diesel
-2.8" Leveling Kit
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post #9 of 12 Old 06-19-2014, 06:38 PM
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It should be putting out around 14V while running.

If it's not than its time for a new one

PIS 175/80's, Van Turbo with EBPV, BD Billet Wheel
Lots of money spent at RiffRaff
Holley fuel pump, in tank mods, crappy riding leveling kit, DP-F6, 5 Gauges+Edge CS in dash, CB radio in Dash, over 100 goofy little mods
Still pretty slow, just less slow now.
Quote:
Originally Posted by peixinho View Post
I love finally having my truck back... that 7.3 dog that I was driving was just not cutting it.
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post #10 of 12 Old 06-19-2014, 08:39 PM
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Yup, should be 13.5-14.5

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