460 Ford Forum banner

1 - 18 of 18 Posts

·
Premium Member
Joined
·
372 Posts
Discussion Starter #1
I've been driving the 590" Boss Mustang, but need help with the electronics. I guess we have reached the end of our talent level, and as of now I feel lost as last year's Easter egg. How can I get the tach, speedometer, electric fan, fuel gauge, etc to work? We wired the fan to a fused switch that goes directly to the battery. A 30A fuse won't run it, it takes a 40. There's the computer, smart junction box, and processors in the dash, all fighting us. Does anyone know how to make all this stuff work? I'd even bring the car to anyone who thinks they can finish it up. ... Kaase
 

·
Registered
Joined
·
1,658 Posts
I don't know how to fix it, I do know that I had to do a lot of hardwiring when I changed an F150 from EFI to carb a few years back, including the transmission :roll: . An unfortunate amount of things depend on each other in an irritating way. You might need a computer reprogram if those gauges depend on the computer and are looking for the old ignition/fuel system.

Good Luck!
 

·
Registered
Joined
·
928 Posts
Jon you are as someone else stated going to need a computor of some type to get the gauges to work, the speedo used the same VSS signal as the trans module and/or the ABS in this case. Do you still have the ABS working? and the tach used the CPS signal that was used to fire the injectors. I don't have the answer of how to get the stock stuff to work but you might look into if anyone has a gauge setup that will fit in the stock panel and look original but be mechanical or at least seperate from the ECM.
 

·
Registered
Joined
·
3,790 Posts
Jon,Your problem is the only one that has me worried w/my bb swap in my 06. I love the way my stock dash setup works.Electronics is definately not my specialty. If I find anything, I will let you know. I'm not at this stage of the game yet but,I'll be watching this thread very close. Rick
 

·
Registered
Joined
·
115 Posts
Jon, I'm sure that if you have Chuck Lawrence on the case, then you have the best there is helping you. I dont have an answer or even a guide other than to reiterate Chucks name, but if you want to bring it over for me to road test and verify that all of the above mentioned gauges don't function properly I'll be happy to oblige:)

ps- I look forward to ordering my parts from you in the near future.
 

·
Registered
Joined
·
6,392 Posts
Just take it to the nearest Ford dealership..........thats all under warranty right????? lol.


Is the factory pcm still intact? What I'm getting at is how much of the factory wiring and such di you remove or leave??
 

·
Registered
Joined
·
3,790 Posts
Jon, I talked to a guy today and he said the factory tach got its info from the coil packs on the wires :shock: If thats true it looks impossible for our factory tachs to work off MSD. All that is way above my knowledge :? Rick
 

·
Registered
Joined
·
1,979 Posts
My first thought is to contact Byron on here. Either that or find a good Ford tech somewhere that likes a challenge.

Sound slike you'll probably need a bit of custom computer work though. Maybe even a custom chip to turn off the stuff that is not there and force it into functioning without it. What about contacting the custom chip guys out there that are burning stuff on the new Stangs?
 

·
Premium Member
Joined
·
3,225 Posts
richter69 said:
Just take it to the nearest Ford dealership..........thats all under warranty right????? lol.
That is what I was thinking, I'm sure that dealer you bought the car from would love to see that car in a service bay at his dealership. :lol:
 

·
Registered
Joined
·
1,266 Posts
Ditto on the Byron conection, a plane ticket and a couple nights in a hotel, and should have all the inverters and or sensors you need to triger the computer(s) to work the dash.

Fan, not so tough, rest of the stuff... I could give ideas, but with no practicle.. BFD..

The problem with the fan is the start-up spike. Same thing we all have with the Mark VIII, Taurus, and or Mustang fans. Fan is something between 30 and 40 amp continuous draw, but start-up spike depending on model can be 50 to 65 amps... even when using the big wire slow blow auto fuse, that spike is more than they can take. Best way for a manual, and in the long run when you feed the ECT back into the ECM and run it off the computer, is to actually run the fan off of a relay, let your manual switch and such simply trip 15 amps to the relay, same as ford did... I would suggest using the Bosh 75 amp relay versus the standard store bought 45 amp ones. Byron's Mark VIII fan write up had part numbers, its searchable on the interweb. Or you can just hit Bosch... and get the part number. Its the same pin placement as the conventional 5 pin relay... just rated for higher flow.


The ECM was programed to trip the fans on at 210 and off at 185, the thing was programed to run through one circuit that had a resistor, and basically a low speed, or switch to an alternate high speed circuit when temps are above (don't know the threshold) and or when the AC is on. AC is wired direct to PCM and back to relay, bypasses the ECT circuit on the engine.

The PCM used the crank position sensor to identify tach output. Problem is it used a square wave signal to ID number 1 for the spark fireing point. That was also the 1 revolution indicator. The MSD is not equiped with a square shutter readout like the Ford distributors before the DIS system.... Figure Byron could come up with a little card that could replace that function, and allow the PCM to talk to the dash module to run the Tach. Perhaps wire to the dash module direct???
 

·
Registered
Joined
·
6,697 Posts
schmitty said:
richter69 said:
Just take it to the nearest Ford dealership..........thats all under warranty right????? lol.
That is what I was thinking, I'm sure that dealer you bought the car from would love to see that car in a service bay at his dealership. :lol:
:lol: :lol: That's the ticket, take it back to the dealer where you purchased the car :lol: :lol: "It's still under warranty, right?" :p



Never pay again for live sex! | Hot girls doing naughty stuff for free! | Chat for free!
 

·
Registered
Joined
·
1,266 Posts
FACracr said:
http://www.mustang50magazine.com/featuredvehicles/m5lp_0707_2005_ford_mustang_427/index.html

Some one beat you to this a few years ago, but they could be alot of help if you can find them

http://image.mustang50magazine.com/f/9024323/m5lp_0707_06_z+2005_ford_mustang_427+engine.jpg
Now its been a while, and they might have figured out a thing or two more... if they got an engine in the car that didn't blow up. But from the article, sounds like they got about as far as Jon when it comes to the S197 chasis. They were tripping the AC by toggle... probably had fan wired through releay, key on, fan on...
 

·
Registered
Joined
·
3,839 Posts
JonKaase said:
I've been driving the 590" Boss Mustang, but need help with the electronics. I guess we have reached the end of our talent level, and as of now I feel lost as last year's Easter egg. How can I get the tach, speedometer, electric fan, fuel gauge, etc to work? We wired the fan to a fused switch that goes directly to the battery. A 30A fuse won't run it, it takes a 40. There's the computer, smart junction box, and processors in the dash, all fighting us. Does anyone know how to make all this stuff work? I'd even bring the car to anyone who thinks they can finish it up. ... Kaase
to bad your so far away, i could do the fan,and speedo , autometer sensor ,and a recalabrated dial would fix that,and relay for the fan,and we would run new wire(restor style) for the gauge

-rich
 
1 - 18 of 18 Posts
Top