What's a PSOM & how do I "P" it??? - Page 3 - Ford Bronco Forum
 1Likes
Reply
 
LinkBack Thread Tools Display Modes
post #41 of 299 (permalink) Old 03-21-2007, 03:23 AM
Registered User
 
djdan's Avatar
 
Join Date: Nov 2004
Location: Indianapolis, IN
Posts: 544
Bronco Info: 1992 EB 5.8 Durabak Black Chuck Norris "Thumbs Up" Edition
iTrader: (4)
Quote:
Originally Posted by Ogeechee 4x4 View Post
Interesting! Sooo...what's that say in english?
+1

djdan is offline  
Sponsored Links
Advertisement
 
post #42 of 299 (permalink) Old 03-21-2007, 07:50 PM
Satyr of the Midwest
 
SigEpBlue's Avatar
 
Join Date: Nov 2005
Location: Ida & Grand Rapids, Michigan, a.k.a The Unemployment Capital of America
Posts: 17,752
Bronco Info: 1993 EB, 5.8L, BIO0 MAF, GT40Ps, Mustang cam, GT40 Intake, Custom Headers, Moates QuarterHorse
iTrader: (2)
Just for giggles today, I decided to check out my conversion factor. My rig originally came factory with the 235/75-15's, but someone put the better-looking 31x10.5's and aluminum rims on it in a past life. No big surprise to find out that the conversion factor was never changed to reflect the change in tire size; it was 9.72, so I changed it to 9.18....after I accidentally touched the cigarette lighter's hot contact. DOH! Replaced the fuse, and all is well. For some reason, it just feels better driving now, especially at highway speed.

SigEpBlue
Wheelin' across Michigan from Ida to Grand Rapids, baby!
Quote:
Nemo nisi per amicitiam cognoscitur -- No one learns except by friendship.
Quote:
Originally Posted by Adlai Stevenson
Isn't it conceivable to you that an intelligent person could harbor two opposing ideas in his mind?
SigEpBlue is offline  
post #43 of 299 (permalink) Old 03-21-2007, 10:13 PM Thread Starter
Banned
 
Steve83's Avatar
 
Join Date: Jul 2003
Location: Memphis, TN
Posts: 40,449
Bronco Info: '83 VIN & title on '93 frame/body w/'95 4.9L & EB paint
iTrader: (103)
The shift points are now correct for the engine's power band & the vehicle's weight.
Steve83 is offline  
 
post #44 of 299 (permalink) Old 03-22-2007, 01:03 AM
Registered User
 
djdan's Avatar
 
Join Date: Nov 2004
Location: Indianapolis, IN
Posts: 544
Bronco Info: 1992 EB 5.8 Durabak Black Chuck Norris "Thumbs Up" Edition
iTrader: (4)
Quote:
Originally Posted by Steve83 View Post
Wow - something I never knew... I'll have to try it sometime.

Ok Steve...pretend I'm dumb (I am)....what does this MEAN?!

djdan is offline  
post #45 of 299 (permalink) Old 03-22-2007, 01:48 AM Thread Starter
Banned
 
Steve83's Avatar
 
Join Date: Jul 2003
Location: Memphis, TN
Posts: 40,449
Bronco Info: '83 VIN & title on '93 frame/body w/'95 4.9L & EB paint
iTrader: (103)
Did you read the caption??? It's pretty straightforward.
Steve83 is offline  
post #46 of 299 (permalink) Old 03-22-2007, 02:10 AM
Registered User
 
djdan's Avatar
 
Join Date: Nov 2004
Location: Indianapolis, IN
Posts: 544
Bronco Info: 1992 EB 5.8 Durabak Black Chuck Norris "Thumbs Up" Edition
iTrader: (4)


In my defense I'm sleep deprivated, on 3 Jack and Cokes, and working feverishly on organizing THOUSANDS UPON THOUSANDS of music files that I've put off doing for YEARS. I'm trying to be a better DJDan

I also havent driven my Bronc in 3 days so I'm having withdrawal. The pass. side exhaust man. took a HALF DAY to remove! It was angry.

Back on Topic! Sorry!

djdan is offline  
post #47 of 299 (permalink) Old 03-22-2007, 09:04 AM
green ones make me horny
 
imlikeojnow's Avatar
 
Join Date: May 2005
Location: Eglin AFB, Fl
Posts: 11,174
Bronco Info: 1994 w/ built 302, E4OD, 33in tires, custom exhaust, upgraded ign. running like a raped ape
iTrader: (22)
Did it today. felt weird at first like i was going too slow but then i guess i have been just going too fast the whole time



Quote:
Originally Posted by SigEpBlue View Post
No, I don't have this problem. Money grows on trees here in Michigan, and my Bronco gets 45 mpg. It emits sunshine and a light berry scent, and it never needs service or parts.
imlikeojnow is offline  
post #48 of 299 (permalink) Old 03-22-2007, 05:14 PM
Mentally in Cancun.
 
stan the man's Avatar
 
Join Date: Nov 2006
Location: San Jose, CA.
Posts: 6,428
Bronco Info: 1996 Ford Blazer. Lifted, locked, and loaded. Where's the Zombies?
iTrader: (11)
so all this does is recalibrates the speedo? or does it change the shift points too?

i wonder if this will help get better MPG.
stan the man is offline  
post #49 of 299 (permalink) Old 03-22-2007, 05:18 PM
green ones make me horny
 
imlikeojnow's Avatar
 
Join Date: May 2005
Location: Eglin AFB, Fl
Posts: 11,174
Bronco Info: 1994 w/ built 302, E4OD, 33in tires, custom exhaust, upgraded ign. running like a raped ape
iTrader: (22)
Quote:
Originally Posted by stan the man View Post
so all this does is recalibrates the speedo? or does it change the shift points too?

i wonder if this will help get better MPG.


Depending on the year. with mine it fixed the shift points because they are computer controlled. My trucks shifts at lower RPMs now than it did before so i can only see it getting better gas mileage.



Quote:
Originally Posted by SigEpBlue View Post
No, I don't have this problem. Money grows on trees here in Michigan, and my Bronco gets 45 mpg. It emits sunshine and a light berry scent, and it never needs service or parts.
imlikeojnow is offline  
post #50 of 299 (permalink) Old 03-22-2007, 05:36 PM Thread Starter
Banned
 
Steve83's Avatar
 
Join Date: Jul 2003
Location: Memphis, TN
Posts: 40,449
Bronco Info: '83 VIN & title on '93 frame/body w/'95 4.9L & EB paint
iTrader: (103)
It doesn't actually CHANGE the shift points; it just makes them happen at the actual correct speeds, where they were always designed to happen.

And it won't actually change the mileage, either. But it will show the CORRECT mileage, and your MPG calculated off your (now corrected) odometer will be higher than it used to be when the odo was wrong. But again: the actual fuel economy isn't changing - you were just using bad numbers between going to bigger tires & correcting the PSOM.

If you went to SMALLER tires than the PSOM was programmed for, you apparent MPG would have gone up with those wrong tires, and by reprogramming, you'd bring it back DOWN to true.

For instance:
Stock tires are ~29" tall, and we'll say you were getting ~15 MPG on them. If you swap to 33s (~31.5" tall), your actual mileage wouldn't change much, but it would APPEAR to drop ~9% to around 13.5 MPG only because your odometer is now ~9% wrong. By calibrating the PSOM, it would appear to go back up to ~15 MPG, but it was really ~15 MPG the whole time.

On trucks with a PSOM, gearing has no effect on odometer accuracy. On all vehicles, gearing has very little effect on MPG.
Steve83 is offline  
post #51 of 299 (permalink) Old 03-22-2007, 09:46 PM
Mentally in Cancun.
 
stan the man's Avatar
 
Join Date: Nov 2006
Location: San Jose, CA.
Posts: 6,428
Bronco Info: 1996 Ford Blazer. Lifted, locked, and loaded. Where's the Zombies?
iTrader: (11)
so uh silly question... how would i go about grounding this PSOM wire?
stan the man is offline  
post #52 of 299 (permalink) Old 03-23-2007, 12:45 AM Thread Starter
Banned
 
Steve83's Avatar
 
Join Date: Jul 2003
Location: Memphis, TN
Posts: 40,449
Bronco Info: '83 VIN & title on '93 frame/body w/'95 4.9L & EB paint
iTrader: (103)


Put down the tools; step AWAY from the Bronco...










That's pretty scary. If you don't know how to ground something, you really shouldn't mess with anything electrical.
Steve83 is offline  
post #53 of 299 (permalink) Old 03-23-2007, 01:29 AM
Mentally in Cancun.
 
stan the man's Avatar
 
Join Date: Nov 2006
Location: San Jose, CA.
Posts: 6,428
Bronco Info: 1996 Ford Blazer. Lifted, locked, and loaded. Where's the Zombies?
iTrader: (11)
haha... no i know how to ground wires. my lt blue and yellow wire runs into a brown plastic connector and it says PSOM on it.
stan the man is offline  
post #54 of 299 (permalink) Old 03-23-2007, 04:24 AM
Registered User
 
djdan's Avatar
 
Join Date: Nov 2004
Location: Indianapolis, IN
Posts: 544
Bronco Info: 1992 EB 5.8 Durabak Black Chuck Norris "Thumbs Up" Edition
iTrader: (4)
Quote:
Originally Posted by stan the man View Post
haha... no i know how to ground wires. my lt blue and yellow wire runs into a brown plastic connector and it says PSOM on it.
Pull the pass. kick. Take a (approx.) 2 ft. peice of wire and strip both ends. Take wire and stick one end in BACK or brown plastic connector. Take other end and wrap around metal bracket located next to the inertia switch.

When finished remove wire and put everything back together.

djdan is offline  
post #55 of 299 (permalink) Old 03-23-2007, 06:14 AM
Yup, I'm fullsize....
 
unixdude's Avatar
 
Join Date: Jan 2005
Location: Peoples Republic of NJ
Posts: 1,797
Bronco Info: 1995 XLT, 351, ARB's, 4" BDS lift, Truxus MT 35's w/4.56 & MT Classic II's, '00 CVPI
iTrader: (3)
Quote:
Originally Posted by djdan View Post
Pull the pass. kick. Take a (approx.) 2 ft. peice of wire and strip both ends. Take wire and stick one end in BACK or brown plastic connector. Take other end and wrap around metal bracket located next to the inertia switch.

When finished remove wire and put everything back together.
Or take a shorter piece of wire (strip both ends) and ground it to the cig lighter. I think Steve83 mentioned this trick somewhere in this thread. Worked perfect for me. If I can figure it out, anyone can.

-unixdude
Your mind is like a parachute, it works much better when it is open.
Prior Proper Planning Prevents Piss Poor Performance (the 7 p's)
Code:
 _     _ __   _ _____ _     _ ______  _     _ ______  _______
 |     | | \  |   |    \___/  |     \ |     | |     \ |______
 |_____| |  \_| __|__ _/   \_ |_____/ |_____| |_____/ |______

Last edited by unixdude; 03-23-2007 at 06:16 AM. Reason: Duh, forgot something!
unixdude is offline  
post #56 of 299 (permalink) Old 03-23-2007, 08:10 AM
green ones make me horny
 
imlikeojnow's Avatar
 
Join Date: May 2005
Location: Eglin AFB, Fl
Posts: 11,174
Bronco Info: 1994 w/ built 302, E4OD, 33in tires, custom exhaust, upgraded ign. running like a raped ape
iTrader: (22)
Are you serious you do not know how to ground that wire? I got a wire just for grounding. it has aligator clips on it. One side to the connector other one to door hinge and voila



Quote:
Originally Posted by SigEpBlue View Post
No, I don't have this problem. Money grows on trees here in Michigan, and my Bronco gets 45 mpg. It emits sunshine and a light berry scent, and it never needs service or parts.
imlikeojnow is offline  
post #57 of 299 (permalink) Old 03-23-2007, 02:02 PM
Registered User
 
djdan's Avatar
 
Join Date: Nov 2004
Location: Indianapolis, IN
Posts: 544
Bronco Info: 1992 EB 5.8 Durabak Black Chuck Norris "Thumbs Up" Edition
iTrader: (4)
My pass. kick was already off so I went with it there.

djdan is offline  
post #58 of 299 (permalink) Old 03-25-2007, 12:20 PM
Satyr of the Midwest
 
SigEpBlue's Avatar
 
Join Date: Nov 2005
Location: Ida & Grand Rapids, Michigan, a.k.a The Unemployment Capital of America
Posts: 17,752
Bronco Info: 1993 EB, 5.8L, BIO0 MAF, GT40Ps, Mustang cam, GT40 Intake, Custom Headers, Moates QuarterHorse
iTrader: (2)
What are you guys talking about? Just lick both thumbs, grab the wire with one hand, hang on to something metal under the dash with the other, and you're set.




j/k if you thought that was going to work, I've got a bridge to sell you.

SigEpBlue
Wheelin' across Michigan from Ida to Grand Rapids, baby!
Quote:
Nemo nisi per amicitiam cognoscitur -- No one learns except by friendship.
Quote:
Originally Posted by Adlai Stevenson
Isn't it conceivable to you that an intelligent person could harbor two opposing ideas in his mind?
SigEpBlue is offline  
post #59 of 299 (permalink) Old 03-29-2007, 09:38 PM
Registered User
 
ToughXLT's Avatar
 
Join Date: Jan 2007
Location: North County San Diego
Posts: 662
Bronco Info: 1995xlt 5.8
iTrader: (1)
Crap in a hat! This was the SIMPELEST mod I have done so far. Literally took 3 minutes. The instructions are exact (at least for me doing my 1995).. Now I have the correct specs for my 35's. I want to go try it out now.. Anyone who has made the change to 35's this is the best thing to do after.

People seem to like me because I am polite and I am rarely late. I like to eat ice cream and I really enjoy a nice pair of slacks. Years later, a doctor will tell me that I have an I.Q. of 48 and am what some people call mentally retarded.
ToughXLT is offline  
post #60 of 299 (permalink) Old 06-17-2007, 07:20 PM
Registered User
 
william_ace's Avatar
 
Join Date: Jul 2004
Location: San Antonio, Texas yeah baby!!!
Posts: 3,017
Bronco Info: 1996 f150 300 ci sas/ZF/10.25/8 lug 44 front 37" tire thingys
iTrader: (12)
thanks for the write up steve, just found it. i did it and used the constant of 810 seems like im going alot slower now. might have to adjust it one more time, but i need someone to drive next to me so i can see how fast im actually going. but thats probably being used to seeing the speedo at 65 and passing people.

william_ace is offline  
Reply

  Ford Bronco Forum > Bronco Discussions > Technical Write Ups

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Bronco Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself. DO NOT USE Gmail.com accounts. If you only have a Gmail.com email please contact the administrator here

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome