txcop

this isn't exactly a swap question more or less...lol I am trying to ditch the ECM on my 1984 Camaro sport(305 4 bbl auto 700R4) and I am wondering what all is controlled by that ecm????? I see wires going here and there. but the teenager that had it before me wow hacked the wiring under the hood.... anyone have a clue what the ECM controls exactly????? He installed a edlebrock carb and left stock dist. I am wanting to also pop a MSD6AL in it this weekend...... (stock dist.)need to update that I think

NagleMac

iTrader: (1)

Start your own thread

txcop

Wow, thanks for the constructive help their partner

NagleMac

iTrader: (1)

Not trying to be mean, but you arent going to get any answers this way just like the guy who posted before you. Make your own thread and i will gladly help you like i would any other thirdgen owner

vetteoz

iTrader: (13)

If you took the time to use the button above there are a million posts on what the ECM does and how to convert to a carb.

Type in " carb swap " and magically things like this pop up

https://www.thirdgen.org/forums/tech...controled.html
https://www.thirdgen.org/forums/carb...ap-wiring.html
https://www.thirdgen.org/forums/carb...swap-help.html

89rs454

What you have to understand is if we just used the search bar or google for the answers this place would soon die off. When i was Trying to get answers on my swap half the threads i read were wrong and wanted me to buy a painless wiring harness that cost 1000$ or someone saying carb it, when all i wanted was some goddamn wiring diagrams.

It's beyond all comprehension why anyone would want to settle for something less or painless and assume that's the best way to go, instead of trying to improve on it with fresh opinions.
But if you must use the search don't use it on hear, go to google.com and type in your question and at the end of it put thirdgen.org.

txcop

Did you get a diagram??? I've got 84 and 85 shop manuals holler if you need it I will email you the book.....yes its genuine GM book

vetteoz

iTrader: (13)

The operative word being ;FRESH

After 25 years of 3rd Gens , there are only so many correct ways of solving a simple problem; nearly everyone of them has been
posted up on here in detail.
It gets boring having to repeat the same basic stuff to people who can't simply search.
When a guy comes back after reading the available info and requires clarification or help ; no problem.

You also have to appreciate that once upon a time you were on your own when you had a problem;
you couldn't just whip your cell out and get a instant answer off the net like today.
When your car broke , you rode your kid bros bike to the library ,got a book, crawled under your car and learnt stuff , a slowly dieing art .
Newbies owners in the large these days don't want to research and learn.
They want a simple "join X to Y and cut B "answer that they can implement and not ever need to know why they did it.

The fun of the internet ; being a public forum you get all sorts
Like any other Forum it is up to you to filter out the loonies , the purists, the guys who know their stuff , the guys just raising their post counts
and decide who's opinion best suits your application.

89rs454

You are correct on everything you said, but all i was saying was there will always be room for improvement, and efficiency of how to install and fix things, it hasn't been covered all yet. I have been here since 2004 despite what my profile says and alot of great guys left, moved on with there life i guess, and alot of the important links they left behind are dead now. Well So much for them old threads that have exactly what you need but a 404 error pops up.
And if anyone is dedicated enough they can swipe through all the bs and fine what there looking for, when i started posting on the forum i didn't know jack **** about cars now i'm at the point i feel like a ******* know it all.

89rs454

Yes Thank you i actually made a thread on my wiring harness lt1 for an 89 and included all the wiring diagrams i used to do it.

vetteoz

iTrader: (13)

No problem with that.
I bought the skills I learnt lying under my car on the side of the road in the middle of the night and added the valuable info I have gained from this and other forums.
But , maybe 25% of what I post in reply to questions I don't know ; but a 30 sec Google or forum search brings up the info that the Op could have just as easily found themselves..........

Ozz1967

iTrader: (4)

I am running a 300HP 350 and using my factory ECM in my 84 T/A.

I did have the carb rebuilt by Cliff Ruggles at Cliffs High Performance because the cam I am running. However if you get a milder cam you won't have any issues. Either way, I would rebuild the carb since you don't know it's condition.

Don't use your 305 heads on the 350, your compression will be way to high. If you get vortec heads, you must get a "spread bore" vortec style intake, this will match the bolt pattern for your carb.

You will need a 350 knock sensor. Other than that it's pretty strait forward. All of your accessories will swap strait over and everything else is pretty much bolt-on.

Ozz1967

iTrader: (4)

You need to swap out that distributor for a non-cc distributor that came in any 1970's chevy. This will solve a majority of your problems with the ECM.

Ozz1967

iTrader: (4)

Top of the page "new thread".

Don't use the heads from the 305, they're crap. Keep the ECm, the car was designed for it. I swapped to a 350 and kept my ECM and computer controlled carb and distributor.

The manifold will swap strait over as will all of your accessories. The block is physically identical externally to your 305 so it'll drop strait in.

dmwracing42

iTrader: (3)

Since it looks like no one has actually answered your question so far, I'll try to help, as I'm in the process of doing the same thing on my '84 TA.

Need a vacuum advance distributor. It must run like absolute *** with the stock distributor in. The 700R4 has lockup controlled by the ECM. I went to a TH400, so I don't have to worry about that but you will need some sort of lockup method. You may have an in tank fuel pump (I did) in which case you have two options. Remove it (I didn't) or rely on the OPSU to run it. The ECM only primes the system, and then the OPSU controls the pump when oil pressure is sensed.

Beyond that, there's nothing that will prevent the car working/running.

For my swap I'm going to have the OPSU wires, the fan switch wires, Ignition/alternator wires, water temp sender wire, and distributor wires. Everything else is extra. Oh, and windshield wiper wires, because I guess those might be useful if I ever end up stuck in the rain, even though I try to avoid it

txcop

upon further investigation I found I actually have a 1985 4 bolt main 350 from a 1-ton truck in my 84 Camaro, I also have an edlebrock 650cfm I believe the previous owner started the non-ecm conversion and failed miserably, that being said I am attempting to find an after market engine harness other than painless (500+ dollars) so I can complete what he started... I ordered the TCI trans lockup kit from summit I think it is 169 or something with free shipping. I have all mechanical fuel so I should be ok their. I do however want to loose manual fan and switch to an electric asap I am researching that as we speak, did that on a foxbody mustang I pro-streeted worked out great even with the 567CID stroker I installed. I was told their is a company here in Houston that sells the conversion harness as soon as I find name I will share it. I was told harness was about 200 to 250 if you wanted fan wiring in harness as well... that is the one I am opting for. sorry for the distraction up above did not mean to screw up your post my bad...

Ozz1967

iTrader: (4)

If you post on the classified sections of this board you should find someone that has a complete one for you. That's what I did when I melted my harness due to an engine fire....no, don't ask. lol

Without the ECM, your car will run fine with a non-cc distributor, you'll just need to find a way to control the lockup which you've already done with the TCI lockup kit. With those two things, you can really leave your harness or what's left of it in place, especially if you want to use your cruise or AC.