ECM upgrade (1227730) for stock 2.8 (Page 60/107)
PaulJK APR 11, 09:34 PM
ryan, pm 2u

[This message has been edited by PaulJK (edited 04-11-2008).]

PaulJK APR 12, 10:48 AM
I just wanted to put in a good word for marc at TRU Mension Mfg. If this adapter works anywhere near as good as it looks, ohhh boy The copper color in the pics is just a reflection of an overhead light.
By the way, I'm planning to use the stock fiero gasket on the flange, adapter plate on top of it, digital EGR gasket onto the adapter, then the digital EGR. Seem OK ?







[This message has been edited by PaulJK (edited 04-12-2008).]

Fino APR 13, 03:53 PM
I have had a chance to drive my car now after installing the 7730 computer. The driveability of the car is like a NEW car. Well worth the install of the computer. I have the EVAP, digital EGR and knock sensor installed.

Thanks Ryan
Ed

------------------
Fino
www.feroce.net
Member National Kit Car Club www.kitcarclub.com
Lifetime Member CFOGi (Lot of good that does me)

Pyrthian APR 25, 10:39 AM
finally getting back to work on my 7730 swap. almost there. now - ran into a Q: the speedo.
the re-wiring instructions have me splicing the speedo feed, so the ECM can piggy back off it.
now, if I wanted the speedo feed to come from the ECM - there is only mention of switching 1 line. what about the 2nd? does the "low" remain? is it like a ground?

and, will this allow me to make speedo adjustments for tire size?
Blacktree APR 25, 11:00 AM
I asked the same question on Page 8. Darth gave a detailed answer.
Darth Fiero APR 25, 11:21 AM

quote
Originally posted by Pyrthian:

finally getting back to work on my 7730 swap. almost there. now - ran into a Q: the speedo.
the re-wiring instructions have me splicing the speedo feed, so the ECM can piggy back off it.
now, if I wanted the speedo feed to come from the ECM - there is only mention of switching 1 line. what about the 2nd? does the "low" remain? is it like a ground?

and, will this allow me to make speedo adjustments for tire size?



The low (purple) VSS wire -which is a ground- coming from the Fiero speedo won't be used if you are running the VSS wiring thru the 7730 ECM. All you will be using is the "hi" (yellow) VSS wire coming from the Fiero's speedo which hooks to the speedo conversion circuit then connects to the 4000ppm output comimg from the 7730 ECM. I don't know how much adjustment the 7730 ECM allows for speedo calibration because I didn't need to get into that in the conversion I did.
Pyrthian MAY 01, 08:59 AM

quote
Originally posted by Darth Fiero:
The low (purple) VSS wire -which is a ground- coming from the Fiero speedo won't be used if you are running the VSS wiring thru the 7730 ECM. All you will be using is the "hi" (yellow) VSS wire coming from the Fiero's speedo which hooks to the speedo conversion circuit then connects to the 4000ppm output comimg from the 7730 ECM. I don't know how much adjustment the 7730 ECM allows for speedo calibration because I didn't need to get into that in the conversion I did.



can ya re-explain this? sorry - when I look at the wiring & the schematics/pinouts - its not falling into place....

and, is there a circuit I need to add to this thing? I saw on page 3? a small circuit (basicly, a filter) which is needed to drive the speedo from the 7730?

[This message has been edited by Pyrthian (edited 05-01-2008).]

Darth Fiero MAY 02, 12:57 AM

quote
Originally posted by Pyrthian:


can ya re-explain this? sorry - when I look at the wiring & the schematics/pinouts - its not falling into place....

and, is there a circuit I need to add to this thing? I saw on page 3? a small circuit (basicly, a filter) which is needed to drive the speedo from the 7730?




The Fiero speedometer head contains the main VSS buffer circuit used in all stock Fieros. This means the Fiero speedo interfaces directly with the speed sensor (VSS). So it has to supply a ground to the sensor (purple wire) and it reads the return signal from the sensor (via the yellow wire). When using a 7730 ECM, you no longer need to have the Fiero speedo send that ground signal to the speed sensor because the 7730 ECM will do that for you (therefore you don't need to hook up the purple wire coming from the speedo to anything). All you need is to hook the 7730 ECM up to the speed sensor as I direct you to do in my wiring instructions. Then the 7730 ECM will output a 4000 pulse per mile signal that you can use for the digital cruise control and the Fiero speedometer. In order for the Fiero speedometer to understand this output from the 7730 ECM, you need to build that "fiero speedo conversion" circuit I have posted on my website. The speedo conversion circuit connects to the 4000 ppm output from the 7730 ECM, the yellow speed sensor wire going to the Fiero speedometer, and a 12v + (hot in run) power source.

-ryan
Pyrthian MAY 02, 08:17 AM
thanks - makes alot more sense now
mswenson289 MAY 05, 12:55 PM
Does anyone that has done this conversion used a scan tool software with it? I thought I had read in this post that you could use FreeScan. I am trying to use it with my 3.4(DIS)new build. Unable to start engine yet. Software (selected 3.1 engine)on the sensor scan page has a line that is called crank postions =0 is this saying I am not getting feedback from my crankcase sensor? Is there any other software to use?
Mike

P.S. I think I may have flooded it and is the cause for it not starting will know more tomorrow. I have spark, fuel at the shrader valve (psi? will check as well tomorrow) and i have a pulse at the injector connector
Just would like to understand the software a little better.