FAST wireing setup ??

[gnsrule]

I just got done installing a FAST batch fire setup w/ 84's in my 86 GN. I lost the instructions that came w/ it, but got the wireing from Pete at ANS where i got it from. The battery wires are obvious, 3 to grnd, and 1 pos. The pink w/ black stripe went to the pink w/ blk stripe on the injector harness. The green went to the green wire (maf) at the plug under the dash, left side, above the oem ecu location. That one i was told to tap into but leave the oem wire intact. The 7 wires left over were run to the 5 wire o2. I was told to just run the colors the same has the harness that came w/ the unit ( if that makes sence).
So here we go, i load up a program from a similar car and sometimes i would get a no comunication w/ the ecu, and other times i would. Upon trying to start it, it would pop and spit and backfire bad. I thought maybe i had a bad ground, so i ran a ground from the frame to the firewall and thats when the shit hit the fan. Upon cranking after that, my coil had a major melt down w/ smoke pouring out the #5 terminal and leaking coil juice all over. Shit !!
Ok, I've got another coil so i swaped it but before trying it w/ the key, i put on my coil tester. When i went to hook up the hot wire, i was getting an arc showing a short im to assume in the module. Needless to say, i guess i fryed both the module and the coil.
Before i throw another 300 bones at for a modual and coil, does anyone have any ideas what just happened ??
Also i noticed my fuel pump would run and cycle the way it should w/ the relays disconnected. I took the oem fuel pump wire and wired it as the energize wire to a new relay in the back. How is it possable the puter is juiceing the fuel pump w/o the relays on the fender hooked up ??
Any and all help is greatly appreciated, thanks ahead of time.
Craig Shellman

[HighPSI]

When you spliced in the pink w/black wire to the injector harness, make sure you didn't "t" it in. It is supposed to replace the factory power feed to the injectors.

[Chuck]

When you spliced in the pink w/black wire to the injector harness, make sure you didn't "t" it in. It is supposed to replace the factory power feed to the injectors.

When I make that connection, I do it on the main harness side of the inj harness plug. That way, the inj harness can be removed without cutting the wire.
Just cut far enough back to allow for a solder connection, and insulation. I then put a short length of shrink wrap on the open end of the main harness wire to insulate it, then re-wrap the harness...

back to :sleep:

[gnsrule]

I did it just the way all of you sugested. I spliced it into the main harness side of the connector, replaceing/eliminating the oem wire. All my wires are solderd and taped or heatshrinked.
Thanks for the help so far, but im still back at square one. I did get a new coil and module already, but man, I'd hate to fry a new one this quick. I'm gonna keep hunting around a bit, maybe throw in a few more redundant grounds just to make sure and then see what happens. Maybe I had a shit coil/module to begin w/. I drove it home w/ 130k 2 yrs ago, but who knows what happend. I'll keep ya posted.
Thanks

[Chuck]

Here's the info I got w/ my SEFI box...
**3 grnds DIRECTLY to batt.
**1 hot all the time. Direct to batt.
**1 to switched 12v.
**Cut the inj feed wire "E" behind the inj harness plug. **Solder a connection using the new wire that's tagged for this circuit. Fold the original wire back and insulate it.
**Jump the MIDDLE wire, [gray/pink] of the MAF harness to the MIDDLE wire of the MAP sensor. [Is green and is in the "B" position]

This is w/ the GN adapter harness that plugged into the OEM main harness, and into the FAST unit.

As for the FP, it could be that the last owner had a different setup on that circuit??

[gnsrule]

I call'd Joe over at PTE just to verify my wireing, and that all checks out ok. Chuck, i guess the batch system is wired different than the sfi. Joe started to say the same as you as far as jumping the maf to map, but after getting a hold of the install instructions for batch fire, all thats needed is the green wire to be "t'd" into the green wire at the clear plug, the pink wire to replace the pink wire, and 3 batt grnd wires to batt grnd, and 1 pos to the batt pos. I dont have a switchd hot wire.
At least i didnt fry my new coil/module, but im still haveing a problem getting communication w/ the ecu. Sometimes i can get it, but most of the time i cant. When I do get comm. and go to fire it up, it backfires like a bitch. Almost like the timeing chain is off, but id bet my ass its not.
Its kinda late tonite, but ill pull a valve cover and check cam timeing by companion cylinder method tomarrow. BTW, i set my cam sensor w/ Caspers cam tool and the finger in the plug hole method, ive never been off w/ a distributor before, so i doubt thats off here, but i'll be checking that too.
Thanks again
Craig

[HighPSI]

The batch fire and sefi boxes are both wired the same. Make sure you don't have the MAF plug plugged in, or grounding out. When you do establish communications, I would go to the F9 (main dashboard) screen and look at all the values for anything out of the ordinary.

[Chuck]

The batch fire and sefi boxes are both wired the same. Make sure you don't have the MAF plug plugged in, or grounding out. When you do establish communications, I would go to the F9 (main dashboard) screen and look at all the values for anything out of the ordinary.
Cal, I couldn't find a difference in the materials I have here, either. I wonder what Joe has that's not in the manual??
I'm wondering why there is no keyed on hot wire?? Is this something that's in the later boxes that's not in my 3 yr old unit??

[Tom Shea]

It's possible that you are not recieving a good signal from the O2. I had that happen to me. I sent the box back to the vendor, they reprogrammed it for the o2 function. I recieved it back and it was Ok after that.

[Chuck]

Craig, there has been some discussion on what brand of laptop will/will not work w/ FAST and other programs.
I had MANY problems when using the IBM Thinkpad for other programs.

What brand are you using?? Maybe others can relate their experiences regarding this, and we may find it's a computer problem.... :unknw:

[gnsrule]

Im useing Pete Bartons Dell from ANS's right now cuz hes got some startup programs in there from a couple of very similar setups. Since this is what he uses, so I doubt thats it, but I just loaded C-Com into my Micron. It works w/ DS on the 87, it should work here.
As far as the o2, i guess possably theres something worth looking at. There was 7 wires not terminated, but came with a adapter harness to the o2. I spliced in 7 wires to the new plug altho the o2 only uses 5 wires. Is the extra 2 wires only needed w/ a 7 wire o2 ?,and while were there, what's the differance ??
I've got the MAF plug just laying there, no maf hooked up, im runnin a 4" inlet pipe, and the IAT pluged in, but not mounted yet.
Hopefully I'll know more tonite.
BTW, Petes puter runs C-Com DOS, but im gonna try Windows tonite, I hope the file I loaded in the ECU will run in windows mode also.
Hopefully i'll know more tonite,
Thanks
Craig

[gnsrule]

WoooHooo !!!!! It Lives !!!! :beerglass
As it turns out, the coil must have been bad right from the get go, altho i drove it home ??I guess that when the coil blew apart, it fried the ccci fuse.
The wb o2 was lighting the gas mixture in the dp.Hence the backfireing.
Sometimes ya gotta go back to the basics even tho your absolutly positive its probably ok. :joint:
Thanks Chuck, Cal and Tom for all your help, greatly appreciated :top: :elefant: :marchmell

[gnsrule]

As it turns out, I need a new copy of C-ComWP. I go to load the disc I got and it comes up " No ip address mark found on the floppy", whatever that means.
I thought the version on the FAST website was to switch to a full version once it sees comunication. I guess not. If someone can mail me a zip'd full version then i think I'm done for a while.
Thanks again
Craig
gnsrule@comcast.net

[Chuck]

The wb o2 was lighting the gas mixture in the dp.

I doubt that would happen.....If the WB was doing that, the car would be a "flame thrower"!!! :zahn:

[gnsrule]

Hey Chuck, I woulda thought so too. It was the wierdest shit man. When i was testing for spark, I had ALL the wires off coil and did the old finger on the coil and crank test for spark, needless to say, it didnt jolt me a bit, but still backfired. The o2 is the only thing it coulda been.
TTYL

Craig