WIll a code for the VSS cause hard shifting in a E4OD?
Thread Starter
|
Senior User
Joined: Jan 2003
Posts: 404
Likes: 0
WIll a code for the VSS cause hard shifting in a E4OD?
Cant remember the code, but it seem that the vss signal isnt getting to the computer althought the speedo is working fine. The transmission does have a shift kit, but this thing is slamming the shifts at most any speed or throttle positions. This is a 93 that i converted to a mass air with a WAY1 computer after the conversion i was thinking it shifted pretty soft even with the bauman shift kit 1-2 with alot of throttle was real soft and slushy, now its so firm it will shutter the truck.
Thread Starter
|
Senior User
Joined: Jan 2003
Posts: 404
Likes: 0
What kind of signal does pin three get from the psom (instrument cluster) voltage, pulse, hz ?? Just want to know what to set the fluke meter meter for. Seeing how the speedo still works maybe i have a bad PSOM
Senior User
Joined: Nov 2009
Posts: 125
Likes: 1
Most if not all transmission codes will cause the transmission line pressure to stay at full pressure to protect the clutches.
What engine is in this truck? If it's bigger, or producing more power than the 302 that the WAY1 computer was designed for, the soft shifting makes it sound like your MAF conversion stopped at the engine. These E4OD ECUs have an engine torque table that feeds into the line pressure calibration. If that doesn't match your current engine, then the line pressure will be wrong even after you get your VSS working again.
Cant remember the code, but it seem that the vss signal isnt getting to the computer althought the speedo is working fine. The transmission does have a shift kit, but this thing is slamming the shifts at most any speed or throttle positions. This is a 93 that i converted to a mass air with a WAY1 computer after the conversion i was thinking it shifted pretty soft even with the bauman shift kit 1-2 with alot of throttle was real soft and slushy, now its so firm it will shutter the truck.
Thread Starter
|
Senior User
Joined: Jan 2003
Posts: 404
Likes: 0
the truck is a 93 F150 with 347 engine producing around 300 hp and i cant rememer the torque number but it was quite abit higher than stock. i built the engine with high torque with low RPms in mind. The transmission was tweeked with a new seperator plate with differnt hole diamerters drilled in it and a spring added to the pressure relief. The computer itself is still stock, i was considering a Moates Quarterhorse to address the calibration issues.
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
Try unplugging the Speed Control Module.
This is in between the PSOM and the PCM computer on the speed signal to the PCM Computer.
If the transmission now works OK you have a bad Speed Control Module.
This is in between the PSOM and the PCM computer on the speed signal to the PCM Computer.
If the transmission now works OK you have a bad Speed Control Module.
Trending Topics
Mountain Pass
Joined: Oct 2007
Posts: 213
Likes: 0
From: Falls of Rough, KY
Mine did it when the TPS went out, the maf feeds the engine the air needs, and signal, but the TPS feed the transmission.
Not the best description, but it kinda what goes on.
Not the best description, but it kinda what goes on.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Rezvani's Latest Post-Apocalytic 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
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
http://7pt3powerstrokediesel.com/lit.../2007_1_04.pdf
/
Thread
Thread Starter
Forum
Replies
Last Post
thegreatgate
1999 - 2016 Super Duty
3
Jun 10, 2016 08:47 AM
Nitro Blazer
1987 - 1996 F150 & Larger F-Series Trucks
22
Feb 1, 2015 10:28 PM
rch10007
Clutch, Transmission, Differential, Axle & Transfer Case
6
Oct 21, 2013 09:11 PM
