I give up...
Thread Starter
|
Freshman User
Joined: Feb 2004
Posts: 27
Likes: 0
From: Texas
I give up...
I guess I will have to take this truck to the dealer. I have had it to the transmission shop and two repair shops and none of them can tell me what is wrong with this. If anyone can save me a trip to the dealer please please help me out. I am frustrated beyond belief.
Symptoms:
Truck runs great. There is a very slight loss of power on the low end but nothing too big. When driving on the highway is where the problem shows up the most. This is a 96 F350 Automatic (Electronically controlled tranny) for reference. The truck runs at 70MPH at about 2700 RPMs. There seems to be some power but not like before. The truck use to run 70 MPH at about 1900 RPMs. The tranny shop says the TC is locking up. The other shop found a code (Didn't get it from the shop) that was pointing to the PCM or the ?Diesel Injector Module??? They said it was running lean.
PCM has been replaced and that didn't fix anything.
Can anyone help on this issue? Thanks
Symptoms:
Truck runs great. There is a very slight loss of power on the low end but nothing too big. When driving on the highway is where the problem shows up the most. This is a 96 F350 Automatic (Electronically controlled tranny) for reference. The truck runs at 70MPH at about 2700 RPMs. There seems to be some power but not like before. The truck use to run 70 MPH at about 1900 RPMs. The tranny shop says the TC is locking up. The other shop found a code (Didn't get it from the shop) that was pointing to the PCM or the ?Diesel Injector Module??? They said it was running lean.
PCM has been replaced and that didn't fix anything.
Can anyone help on this issue? Thanks
FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
Likes: 6
From: Cabot, Arkansas
Originally Posted by t1texx
?Diesel Injector Module???
Junior User
Joined: Jan 2004
Posts: 58
Likes: 0
From: Wasilla, Alaska
Sound as if the Overdrive is off or something. I only say this because I know when I'm cruising around 70 MHP with OD on it aprox. 2000rpm, and if I turn the OD off it would jump to 2500-2700. Maybee this is a dumb question but is your OD working? How high does it jump to when you turn yours off?
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Well something is very wrong with your transmission/torque converter for the rpm to suddenly be that high. I doubt your power loss has anything to do with the engine. It's simply not making it past the transmission.
Trending Topics
Posting Guru
Joined: Jul 2003
Posts: 2,210
Likes: 2
Originally Posted by t1texx
The truck runs at 70MPH at about 2700 RPMs. The truck use to run 70 MPH at about 1900 RPMs.
Originally Posted by t1texx
They said it was running lean.
PCM has been replaced and that didn't fix anything.
PCM has been replaced and that didn't fix anything.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Thread Starter
|
Freshman User
Joined: Feb 2004
Posts: 27
Likes: 0
From: Texas
Originally Posted by Casey
1900/2700 = 0.703, which is REALLY close to the overdrive ratio of 0.71:1. I think your trans isn't shifting to overdrive, but I can't be sure without actually driving the truck.
That is what it feels like to me. You would think the Tranny shop could tell me for sure but I didn't get directed that way. They were leaning more towards the TC.
Well duhhhh.... It's a diesel. Unless there is black smoke pouring out it's running lean. That's how a diesel operates. And no wonder the new PCM didn't fix it, it's SUPPOSED to run lean!
That is what it feels like to me. You would think the Tranny shop could tell me for sure but I didn't get directed that way. They were leaning more towards the TC.
Well duhhhh.... It's a diesel. Unless there is black smoke pouring out it's running lean. That's how a diesel operates. And no wonder the new PCM didn't fix it, it's SUPPOSED to run lean!
Anyone have any reason to suspect the cam sensor with these symptoms?
Posting Guru
Joined: Dec 2003
Posts: 1,570
Likes: 0
From: South Texas Coast
Originally Posted by t1texx
Anyone have any reason to suspect the cam sensor with these symptoms?
Cam sensor causes complete 100% loss of power as in truck wont run at all. Cam sensor pretty straight forward diagnosis: If truck wont start and tach doesn't move while cranking its probably cam sensor
I agree with Kwik It really sounds like a tranny problem most likely Torque Converter. Before you take it to a Ford stealership try any good rep tranny shop. Some chips mess with shift points and internal transmission pressure so to be sure its not chip related pull the chip and try it stock.
Last edited by Phydeaux88; Nov 3, 2005 at 08:44 PM.
Elder User
Joined: Apr 2005
Posts: 907
Likes: 2
From: Jackson, TN
Originally Posted by Phydeaux88
In a word NO!!
Before you take it to a Ford stealership try any good rep tranny shop.
Before you take it to a Ford stealership try any good rep tranny shop.
I'm not knocking the indy shops in any way. I'm just tired of people bad-mouthing the dealerships because their brother-in-laws half-sisters cousin had a bad experience at one 12 years ago.
Now, back on topic, is the O/D light on the shifter handle coming on when you press the button? Also, is the catalytic converter still on the truck? Maybe it is restricted, causing the low power concern?
Posting Guru
Joined: Dec 2003
Posts: 1,570
Likes: 0
From: South Texas Coast
I dont know where you are at but around here shop rates are not even close when comparing the Ford shop to a good independant.
However, my aversion to "stealerships" has more to do with overpriced parts and supplies than anything else. For example the price of a CPS at Ford $200 ish and at International $100, the price of anti cavitation additive at Ford $11 per pint and at DIS $4.95 per pint.
Thats why they are commonly called Stealerships around here.
However, my aversion to "stealerships" has more to do with overpriced parts and supplies than anything else. For example the price of a CPS at Ford $200 ish and at International $100, the price of anti cavitation additive at Ford $11 per pint and at DIS $4.95 per pint.
Thats why they are commonly called Stealerships around here.
Last edited by Phydeaux88; Nov 3, 2005 at 11:22 PM.
Thread Starter
|
Freshman User
Joined: Feb 2004
Posts: 27
Likes: 0
From: Texas
Originally Posted by big inch
I get so tired of hearing people say stuff like that. Do you realize that most independent shops charge about the same labor rate as the "stealerships"? Do you also realize that the techs in the "stealerships" work on only a few makes of vehicles, compared to dozens that the independent shop techs have to work on?
I'm not knocking the indy shops in any way. I'm just tired of people bad-mouthing the dealerships because their brother-in-laws half-sisters cousin had a bad experience at one 12 years ago.
Now, back on topic, is the O/D light on the shifter handle coming on when you press the button? Also, is the catalytic converter still on the truck? Maybe it is restricted, causing the low power concern?
I'm not knocking the indy shops in any way. I'm just tired of people bad-mouthing the dealerships because their brother-in-laws half-sisters cousin had a bad experience at one 12 years ago.
Now, back on topic, is the O/D light on the shifter handle coming on when you press the button? Also, is the catalytic converter still on the truck? Maybe it is restricted, causing the low power concern?