link85x

iTrader: (1)

I kinda need some help. I swap my 87 305 TPI from my IROC (which is wrecked, R.I.P.) into a 90 RS V6. I got the motor all bolted in the vehicle. I hook up the wire to the best of my abilitity and finally get it to turn over, but no start. I'm getting spark, but no fuel what so ever. Injectors are not pulsating at all and the fuel pump doesn't even prime when you turn the key. Come to find out that where the other part of the wire from the 87 TPI ( it's two seperate pieces, one harness for the ECM and the other goes into the fuse block) that goes into the fuse block, the pins from the 87 harness do noe match up the female inserts in the 90 V6 fuse block. I was wondering if there is a place where i can get blown up connectors view of the two so i can rewire it? Or is there other way (which i doubt but hope). I'm very open for ideas. Help me please!! Thanks in advance.

Azrael91966669

well the problem your haveing is that the 90 is a speed desity car and the old engine is maf you will need a speed density v8 harness and a bunch of differant sensors

and you will have other issues useing the 90 dash harness with the an older maf system

j dezzy

iTrader: (12)

if you can you should try and swap as much of the electrical from you donor car as possible. I swaped a carbed 350 into an 87 V6 car and ended up switching out the fuse block and most of the electrical from another V8 car.

link85x

iTrader: (1)

Well, since i have the ecm and wire from my old car, i kinda don't need a harness for a speed denisty v8. All of the guage on the dash work properly, oil pressure, tach, volt, dummy lights, the whole nine yards. The problem that i'm having is that some of the pins for the bulk head connector on the 90 actually match some the pins on the 87 harness, and then i have those that don't line up. What i need is to find some diagrams of the bulkhead c100 for 87 305TPI and then one for a 90 V6. I can cross reference and somewhat make my own harness. I just need to be able to find some diagrams. Does this website have any at all? Like some from the big service manual from GM?

89RJcamaroRS

im assuming ur rs has vats since its a 90 u bypassed the starter relay. if the pump is not priming that means u propably did not wire your fuel pump relay correctly explaining why u have no fuel

83z28camaro

these should be but you need. I found them on this site.

link85x

iTrader: (1)

83z28camaro, where did you find that diagram? It helped out a whole lot, if i could just get another one of the 90 v6, i should be good to go. The fuel pump wouldn't recieve power through c100, would it? What about the injectors, how do they recieve their power, is it pin f5, the drk green wire labeled tuned port injection?

83z28camaro

The power for the injectors goes through c207 in 90 but is in c221 in 87. You should have a extra 6 pin connector on the ecm harness where they plug into the dash. the larger one is c207 and the 6 pin is c221. I will be putting a 87 dash harness in my 89 soon and will know the pinout of the 6 pin then. Mike

P.S. I found the pinouts on this site not an easy task seems like whenever someone asks the standard respones is do a search then buy a Helms manual. also the second picture is the 90 c100 pinout. You can tell by the air bag wiring.

link85x

iTrader: (1)

I just figured that out today. I just found that 6pin connector, which is just happily laying around doing nothing, which i traced to find out that its the fuel injector harness. Would it be as simple as plugging into into 207 on the 90? Or do i find the 6 pin in the 90 (if there is one) under the dash somewhere and pray to the Gods? Thanks for helping me out with this btw.

link85x

iTrader: (1)

Also, would there be a way for me to kinda make a power supply for the fuel injectors/fuel pump? Or would i have to get an entire dash harness, which the thought of right now is scaring the hell out of me.

83z28camaro

There is no 6 pin connector on the 90. GM did away with it in 88. The injector power feed wires are in the 90's c207. I think I have the pinout for the c207 connector for an 89. Since I have an 89 and 90 dash harness I will check and see if they pinout the same. And no problem helping you. Mike

1meanGTA

gm service manual ftw

link85x

iTrader: (1)

I wish i had the money tp get that book right now. Another quick, random question. Now, c221 went into the fuse block, to fuse labeled inj.1 and inj.2. Now that 6 pin connector only has three wires in it, one gray and two pink w/black stripes. Could i possibly try and wire those the fuse block, where those fuses are located and see if that works. I assume it won't hurt anything. The two pinks are the fuel injector wire, with the gray i assume bieng fuel pump.

83z28camaro

I think you need to hook the pink wires to the c207 connector terminal B and G. They should be the power wires from the injector fuses. And I think the Gray wire should go to the c100 connector on the G4 terminal. You could either run the wire across the dash and splice it into the gray wire in the c100 or take it from the relay and cut it and put a terminal on it. Then insert it into cavity G4 of the c100. Then hopefully it will run. Mike

link85x

iTrader: (1)

Update, that mysterious gray wire is definitely tan/wht and it powers teh fan relays and what not. Also, i ran power to the inj. (made a temp wire from both pinks and fed them into then fuses and i still get nothing. I'm starting to think that i may need that dash harness, i don't no what going on. I should start checking to see if sensors are sending volt signals to the ecm.

83z28camaro

Alright after looking at the c100 connector pinouts you need to move some wires around. And the c207 will need to be rewired.

But lets start with what the car is doing so far. Does the check engine light come on at all? Can you get me the wire colors and the pin locations for the 90 c207 and for the 87 c207 and c221? I have put together bigger projects without the factory manual.

Does the 90 use a cable or a electric speedometer? I can't remember off the top of my head. But that may be a problem later on once you get the car running.

83z28camaro

I checked the pinouts of my 87 and 90 harnesses today this should help.

link85x

iTrader: (1)

I will get those wire color pinouts for 90 c207 and 87 c207 and c221. Also, can i give you the color pinouts for the c100 and see what you can come up with that? I can't seem to get that right either. Also, vehicle has an electric speedo, which i knew from jump that it would kick my ***. This is definitely a fun experience, although aggriavating. I'll be on again tomorrow in the afternoon, it's really hard getting internet time around here.

83z28camaro

Ya if you can get me the colors of the c100 pinout I will see what I can do. Did you see the file in my last post it has all the pinouts and functions of my 87 and 90 harnesses. Mike

link85x

iTrader: (1)

83, It took me awhile, but i was finally able to get on the PC again. Here's what I found out about C100, C207, and C221:
C:\Camaro Stuff.txt
The spots that have nothing or say empty means that there was a wire there. Hopefully you can help me diagnose this problem, i wanna be able to drive this beast!!!

link85x

iTrader: (1)

Well, i don't know how to use the attachment feature, it's in my attachments in the user cp, but no go. I'll post them on here instead:
1990 Connectors
90 3.1 700r4 Dash Harness (C207)
A - Brown
B - Pink/Black
C - Brown/White
D - Gray
E - White/ Black
F - Pink/Black
G - Pink/Black
H -Tan/Black
J - Orange
K -
L - Dark Blue
M - Black/White
N - Orange/Black
P - Red
R - Purple/White

90 3.1 700r4 Bulkhead (C100)
A4 - Red 5 - Tan/White 7 - Pink/Black
B4 - Purple 7 - Light Blue
C
D6 - White
E5 - Tan 7 - Purple
F4 - Pink 5 - Green 8 - Black/White
G4 - Gray 5 - Red 7 - Orange 8 - Brown

link85x

iTrader: (1)

Well, i guess in the long run I figured out how to use attachments. It there in my last post.

83z28camaro

I will work on this and see what happens. Mike

link85x

iTrader: (1)

Thanks man. I hope you are able to figure something out. Damn swap is driving me nuts!!!

dan440

Ok, my thought is your working with a vats wiring harness, You may indeed need to change the harness under the dash. But beware, Gm changed the mounting brakets on the fire wall. The dashes may look simular...NOT... At least from 83-90. Is it a mech car or all ellectric. makes a diffrence.
2nd The harness under the dash runs the doors, and the conection to the tail lamp is probly diffrent.
3rd if it is a vat system you will need a override module to dissable it.
this will allow power to the inj,fule pump. out side of that no problem.... Ya Right.

link85x

iTrader: (1)

But I also wouldn't be able to crank the engine over with key in cylinder if VATS was a problem, correct? I have the key with the resistor in it and it does turn the engine over and thats about it. Also, when i plugged in my harness, which the fuel injectors recieve there power from an alternate connector, not throught C207 (under the dash to engine harness) they never get any power anyways.

link85x

iTrader: (1)

Check this attachment out. I found all this info. on ALLDATA here at school. I was having a really hard time concentrating on anything, due to being stressed from this mess. These are mostly all the jobs that those wires in the connectors perform. What do you think i should do from here? Put together the wires that pretty much peform the same job between the two vehicles? I mean, it should work, right?

83z28camaro

I scaned through what you got and it looks about right. Just work on making the harnesses the same. A couple things I see are to move on the engine harness move G7 to G8, and add a wire from the output of the fuel pump relay to G4.And on the dash harness remove the wire from F8 and move the wire from A7 to D4. Or alternativly you could remove F8 from the c100 and run a new wire to the c207. I will work out the rest of the c207 and post that. Mike

link85x

iTrader: (1)

Sounds good. If we get this running, you get my vote for president!

cdoyle

Hi,

I've been searching for the pinouts for C100 for an 84 and 91 and haven't had much luck. Would you happen to have it?

I'm trying to convert my 84 dash to a 91, and trying to figure out the wiring differences.

Would you also happen to have a diagram of both cluster harnesses?

I've been searching everywhere, and just can't find my years, and don't want to risk using a 85 and 92 diagrams.

link85x

iTrader: (1)

I got it to run for a couple of seconds! Finally!!! Just that fuel pump will not prime and will not stay on. I manually primed it and fed engine some gas, just enough to start. Something's work, while some don't. But i got it start finally, will keep you all reading this thread posted. Cdoyle, what is your 84 and your 90, v6, v8, carb, inj.? I can get on alldata at school and find out what i can.

83z28camaro

did you get the c207 figured out? I have been busy with work. I just noticed in my last post that I said to connect F8 to the c207 for the fuel pump but that should have been to use G4 to the c207 for the fuel pump. Mike

link85x

iTrader: (1)

Back again 83!!! I guess I stepped ahead of myself. I thought i got it runnnig, but that was onlt because of the starting fluid!!! (Man I was pissed the next day when i found out). Fuel injectors are still not performing there jobs, aswell as i can't get the fuel pump to work properly aswell. Since i have only three months left to get this damn thing running, would it just be easier for me to convert to speed density? I know it gonna cost more, due to the fact that i need another wire harness, aswell as ecm and a few sensors. I just don't have time to be tinkering around with this damn thing anymore. If i was at home, not away at school, i wouldn't mind. But i have to bum rides from people just to get around and it really sucks. So maybe if you can come up with a solution for this current wire harness (which by the way is in really bad shape, due to me not supervising who was doing what at the time of swap, stuff got chopped up unforunately) or should i just go ahead and swap to MAP set-up? I don't mind swapping to the MAP set-up if it allows me to do it directly without having to chop and splice, since the car (90 RS v6) is also a MAP set-up vehicle. What do you think?

83z28camaro

You could probaly get away with using the v6 engine harness and computer if you still have them. You will need a memcal for the v8. Should just need to add injector connectors and route engine connectors properly. I can check the differences between the v6 and v8 tomorrow. Mike

link85x

iTrader: (1)

So, there is no way for the engine to run (mainly the fuel injectors pulsing) unless i have a V8 memcal? Also, the only difference between a 90 305 TPI '730 pcm and a 90 3.1 MPFI '730 pcm is the memcal's, correct? I hooked everything up today (what i could get hooked up, because both wire harness's are a mess). Car turns over, has spark and thats it. Fuel pump still won't prime on its own and fuel injectors will not pulse at all. What the heck is going on? I starting to think that VATS may be a problem. I have the key with resistor in it and the engine does turn over, so would VATS still pose a problem? At this point, i really don't know what to do anymore (I'm starting to panic, but i need to calm down... ok... calm now). Converting to speed, with an tpi harness is the next bet. What do you think?

adam86

iTrader: (1)

im also having this issue but im swaping from 86TPI to and 89TPI car with no harness and im using my 86 harness and im trying to connect to the 89 underdash wiring.... the 86 has the ?C221? connector that powers the injectors but the 89 does not


if anyone has a slight idea of a simple was i can rewire this to make it work please let me know