Main IndexAuto Repair Home Search Posts SEARCH
POSTS
Who's Online WHO'S
ONLINE
Log in LOG
IN







Ford F350 Diesel - Forced Idle


  Email This Post



accuracy
New User

Apr 13, 2010, 1:02 PM

Post #1 of 4 (1973 views)
Shortcut
Ford F350 Diesel - Forced Idle Sign In

2005
Ford
F350 SD
6.0 V8 Diesel

Problem: The scanner kicks out DTC for the MAP sensor, MAP/BAPP sensor and the EGR sensor. The likelihood of all 3 sensors being out is extremely slim. The PCM Reference Voltage which is connnected to all 3 sensors intermittently drops from 5 volts to 1 volt or less. This is causing engine to run in a forced idle mode (no rev when gas pedal is depressed) and/or stall out. When 5 volt Reference Voltage is restored all engine lights go out and truck runs normally. We have already replaced the Accelerator Pedal & Sensor. We have swapped the PCM (with a used one) and the FICM (also used) and the problem still exists. Ford has advised that the F Series trucks have known issues with the control modules so we are still suspecting the PCM is a problem. Has anyone else run into this or do you have any suggestions?


nickwarner
Veteran / Moderator


Apr 13, 2010, 6:09 PM

Post #2 of 4 (1962 views)
Shortcut
Re: Ford F350 Diesel - Forced Idle [In reply to] Sign In

you've really done your homework testing this problem out. Thanks for that. I have heard of the 6.0 diesels having defective PCMs and it makes it hard to trust a salvage unit because of that. The PCM is what delivers the 5v reference, and this looks like a cut and dry case of PCM failure. Being that Ford knows their part is defective, its possible you may convince a dealer to replace it as an extended warranty or policy repair. At the very least, the company may give you a break on the price


accuracy
New User

Apr 13, 2010, 6:17 PM

Post #3 of 4 (1961 views)
Shortcut
Re: Ford F350 Diesel - Forced Idle [In reply to] Sign In

Thank you for the reply Nick, it's nice to hear someone else who knows their stuff is of the same mind. Ford is now taking back the PCM units with a core return which shows to us that they are finally testing the units for possible causes to the problems. They aren't offering much more in the way of a price break and this truck is long off warranty.
We were hoping to see if anyone else had run into this Forced Idle issue before. We are currently awaiting another used PCM unit and if this one fails we will have to break down and go for the new one. Have a great day.


fordtech
User

Apr 14, 2010, 9:08 PM

Post #4 of 4 (1951 views)
Shortcut
Re: Ford F350 Diesel - Forced Idle [In reply to] Sign In

have seen problems with the pcm as well.but also double check grourds as well have seen those cause a issue in a few cases as well.




Ford F350 Diesel - Forced Idle


  Email This Post
 
 






Latest Forum Post
Hi, I have a question in regards to alternators. I'm currently on my 3rd alterna...
2006 Pontiac gran prix gt 3.5 198,000 need to know if there is another way for m...
1. I was at give way and my front was sticking out too much so when I selected r...
my car started, hard starting 6 mos ago, then wouldn't start at all,the x's frie...
YES I HAVE A 1999 MITUBUSHI GALLANT 2.4 L V6 I WAS DRIVING AND IT JUST STARTED S...
I JUST GOT A CHEVY SILVERADO 2500 VORTEC ENGINE SIZE 3500 WHEN IM DRIVING AND PI...

Feed Button


Used Car Search
Used Car Price Ranges:
Under $5,000
$20,000
$35,000

$10,000
$25,000
$40,000
$15,000
$30,000
$45,000
Over $45,000
Search used Cars By Manufacturers:
Used Acura
Used Audi
Used BMW
Used Buick
Used Cadillac
Used Chevrolet
Used Chrysler
Used Dodge
Used FIAT
Used Ford
Used GMC

Used Honda
Used Hyundai
Used Infiniti
Used Jaguar
Used Jeep
Used Kia
Used Land Rover
Used Lexus
Used Lincoln
Used Mazda
Used Mercedes-Benz

Used MINI
Used Mitsubishi
Used Nissan
Used Porsche
Used Saab
Used Scion
Used Subaru
Used Suzuki
Used Toyota
Used Volkswagon
Used Volvo
2010 Honda Civic
$15,770
2004 Jeep
$8,991
2012 Mustang
$22,990
1997 Honda Cr-V
$4,490
2010 Toyota Prius
$17,496
2010 BMW 328
$26,980




Automotive Forum Categories
Automotive Repair
Auto Body Repair and Refinishing
AC Auto Repair Help Forum
Automotive Wiring and Electrical

Auto Insurance and Car Financing
Automotive World
Brake Systems
Car Stereo Repair Advice
Car Troubleshooting
Engine and Car Noises
Engine Fault Codes
Engine Troubleshooting
Exhaust System Repair

Steering and Suspension
Tricks of the Trade
General Discussions
Car Shows and Events
The Bargin Bin
Motor Vehicle Inspection
Car Care Tips
Traffic Ticket Help
Car Racing

Gasoline, Motor Oils, Concept Cars
Remote Control Cars and Vehicles
Truck Repair
Truck Repair Advice


Truck Engine Repair
Truck Suspension Repair
Motorcycle Repair
Motorcycle and ATV Repairs

Motorcycle Body Repair
Motorcycle Clutch Repair
Motorcycle Engine Repair
Motorcycle Seat Repair
Car Forum Posts - Sitemap


Search for (options) Privacy