I haven't been on much lately been really busy and working on the 5.3 swap in my 03 sonoma. I'm having real issues finding someone local who will come do a base tune on the ecm from the truck motor so I have decided to go carbed with the MSD/Edelbrock kit and 770 vacuum secondary quickfuel SS carb. I have had good luck with these carbs on my other cars.
Question is if I go carbed can I just pop the ecm from the sonoma back in the truck for the trans and then spice into it for the speedo/tach and temp gauges?

 

165 views and no one has any answer?

 

people usually go carb cause they don't like the ECM's

Are you just wanting the ECM to control the trans? Or are you going to try to use it for ignition as well?

There was one member who posted recently his efforts to run the ignition off the ECM. If I remember correctly it had issues.

At any rate almost no one does what you are asking so you might have quite a few more views with no answer.

If you get it working be sure to post details....

 

Fairly certain you'll need a stand alone for the trans and a MSD for the carbed motor

 

I'm not looking to run the ignition off the ecm the engine will totally stand alone.The 4l60E that I have only has about 200kms since it was rebuilt.
I was under the impression that it needed the ecm to tell it when to shift and it would be an easy way to tie into the exsisting harness for the tach, oil pressure, speedo and temp gauge.

 

The setup I was looking at I can get the MSD box Rpm airgap intake and a quickfuel ss 770 for just under a grand and for the fuel pump I was looking at the holly mighty mite.

 

Just make sure you get the MSD and not Edelbrock ignition box. Quickfuels are nice carbs. I'm not a big fan of dual planes but sounds like a nice package deal.

I have a manual so I'm not a good source of info on the trans, but I'm pretty sure most guys run some sort of aftermarket box for that. I don't think the ECM has anything to do with the oil pressure gauge, not sure about temp but may be the same way as well. Most guys just plumb the oil and temp sensor from the old motor to the new one. The MSD box has a tach output and again not sure you need an ECM for a speedo.

Monday is a good day for people posting. Hopefully someone will correct anything I said wrong above. But I will be surprised if you get a response from anyone running an ECM in any capacity with a carb. It just doesn't happen that often from what I can tell.

 

I'll look into the stand alone controller for the trans. And yes it is the MSD box with the 6 or 8 "pills" for the timing. I have used the quickfuel SS carbs on other builds and absolutly love them the 4 corner tuning makes setting the carb to kill when you hammer the gas a breeze.
This build is also for the wife to drive so I have to make it somewhat friendly for her. I'm just in the process today of pulling the box. I did the frame on the front clip and under the cab so I wanted to do the rest of it because it will bother the hell out of me to leave it half finished.
Only good thing now is that it's turning really nice out so I can push it outside to blast the rear frame so it doesn't take me a week to clean my tool boxes and the shop again lol.

 

I don't have any experience with electronically controlling a trans, but I did experiment with controlling the ignition with the stock PCM. The key when doing this is that you have to tell EVEYTHING not to report to the pcm so that when the pcm realizes that it isn't getting signals from fuel injectors, o2, etc..., it doesn't cut out timing of go into limp mode. There are a lot of timing tables that are fixed into the pcm for certain situations and almost everything affects them some way or another. I had a problem with mine where it *seemed* like it was cutting out timing and only running on advance from the MAP. I think it may have been bad knock sensors, but I'm not completely sure. At some point I'll get a test engine and start testing this again.

My guess is that if something reports to the pcm that it isn't getting a signal, then it could tell the trans not to shift, usually this is for 'safety' reasons, but would make the car impossible to drive regardless.

Someone more experienced will most likely chime in.

 

Personally, IF I was to do it over again....I'd get the Daytona Box
But I do have the MSD right now and works fine.