1997 Mountaineer 5.0 for Coil-near-plug swap

[ATPCR]

I'm switching to the 2003-04 pcm. It is the most recommended and has the tachometer output. Several wires will need swapped at the 104
pin pcm connector.
Thanks for everyone's interest in this project.

[decipha]

To my knowledge the only 03/04 ecu's that may have tach output hardware is the crown vic sport and marauder ecu's.

[ATPCR]

I'll just have to get a tach adapter when the time comes. The second project has a 1969 Cougar tach, so I'll have to get an Autometer 9117 tach adapter. https://www.autometer.com/tach-adapter. ... lsrc=aw.ds

[ATPCR]

NOTE: I did not switch to the 2003-04 pcm on this project. I'm too far along with everything to switch away from the 1999 CV pcm and wiring.
I'm ready to hook up the AEM AFR gauge to the pcm. I have the old egr wire running into the interior of the vehicle. From the instructions provide in the link below that it is the white wire coming off of the gauge pigtail that the pcm wire will attach to.

https://static.summitracing.com/global/ ... 0-4110.pdf

[decipha]

NOTE: I did not switch to the 2003-04 pcm on this project. I'm too far along with everything to switch away from the 1999 CV pcm and wiring.[/url]

What's the differences you've found between the 99 cv and the 03/04 luxury sedan?

According to the homepage they are the same wiring harness 99-04 crown vic.

[ATPCR]

Page # 6 we had some discussion about CHT and ECT. It is not wasted learning. I needed to know about it and after studying the 2003 CV pinout charts, I see that 2003s have both listed on the same pin. But on this set-up, I'm now using the ECT sensor, so all is well.
Several months ago, I noticed some important differences with 1999 Crown Vic and 2003 Crown Vic 104 pin, pinout charts. The 2003 has the most options and I see why it is the best suited for any conversions. I've already had the main powertrain harness out and rearranged close to 30 wires between the '97MM and the '99CV. It is all back in and working and although it is not too difficult to rearrange some pins, I'm not revisiting that on this particular vehicle. I'm sticking with the '99 pcm for this first experimental conversion.
Between the 1999 Crown Vic and the 2003 Crown Vic, the following pins are different and important. I won't list all of the additional 2003 pins.
(From the FoMoCo published wiring diagram books)
Ther are 9 differences
Pin numbers:
1999CV --------------2003CV
#24 not used-------- ground
#32 not used------- knock sensor(-)
#33 VSS(-)---------- not used
#45 CHT indicator----- generator common
#48 not used------- tachometer input
#57 not used------- knock sensor(+)
#58 VSS(+) ------- not used -------(1999 book has a typo and lists it a (-) too)
#66 CHT sensor------- CHT/ECT sensor
#68 not used -------- VSS(+)
#70 not used ------- generator/battery indicator control
#76 not used--------------ground
#77 Key on power---------NOT USED
#97 not used ------- voltage in start run (key on power)
I'm just guessing that when the Crown Vics went to non-return fuel and the fastest chip clock speed, that the pins may be all the same.
1999 CV book images

2003 book images

[decipha]

not used means theres no differences between them

the 99-04 are the same you can simply unplug the 99 ecu and plug in the 03/04.

theres a pin out chart under references on the homepage. Its best to reference that chart as often times those manuals pin out info is wrong.

[ATPCR]

"Not used" in the individual book charts, means pin (circuit) not used. I used the FoMoCo 1999 Crown Vic electrical diagram book to wire the powertrain harness for the 1999 Crown Vic pcm and everything works correctly. I posted the images of the pages. I made two columns there. The 1999 is on the left, the 2003 is on the right. I believe what I posted is pretty clear. The 1999 book that I have is closer to what you have in the large chart in the 1998 CV column. Also, I'm using CRAI8 strategy and not RZASA. I used the 1999 CV book to check the 1999 CV 104 pin connector and everything matched.
BTW, no offence intended.

[decipha]

no offense taken just trying to help you out

are you referring to this

1999CV --------------2003CV
same #24 not used-------- ground
same #32 not used------- knock sensor(-)
same #33 VSS(-)---------- not used
same #45 CHT indicator----- generator common
same #48 not used------- tachometer input
same #57 not used------- knock sensor(+)
same #58 VSS(+) ------- not used -------(1999 book has a typo and lists it a (-) too)
same #66 CHT sensor------- CHT/ECT sensor
same #68 not used -------- VSS(+)
same #70 not used ------- generator/battery indicator control
same #76 not used--------------ground
same #77 Key on power---------NOT USED
same #97 not used ------- voltage in start run (key on power)

As you can see its identical from 99-04 there were no changes made according to what you posted.

[ATPCR]

This is what the book says that may be in error:
The 1999 CV pin #24 is not used, but on the 2003 CV pcm pin #24 is a ground.
The 1999 CV pin #32 is not used, but on the 2003 CVpin #32 is used for the knock sensor(-).
The 1999 pin #33 is used for VSS(-), but on the 2003 CV it is not used.
The 1999 CV pin #45 is CHT indicator, but on the 2003 CV pin #45 is for generator common.
The 1999 CV pin #57 is not used, but on the 2003 CV pin #57 is used for the knock sensor(+).
The 1999 CV pin #58 is for VSS(+) ,but on the 2003 CV pin # 58 is not used.
The 1999 CV pin #68 is not used, but on the 2003 CV pin #68 is for the VSS(+).
The 1999 CV pin #70 is not used, but on the 2003 pin #70 is for generator/battery indicator control.
The 1999 CV pin #76 is not used, but on the 2003 pin #76 is a ground
The 1999 CV pin #77 is for Key on power, but for the 2003 pin #77 is NOT USED.
The 1999CV pin #97 is not used, but the 2003 pin #97 is used for voltage in start run (key on power).
So you are basically saying that my 1999 book may have an error having to do with VSS(+)? Should my VSS(+) be on pin #68?
Where is VSS(-) on the 2003 Crown Vic pcm? On your site, the 2003 (99-04) column pin-out chart doesn't have a VSS(-)