2005 Vette, 6spd, 110k miles. The original E40 failed at 6 years. The replacement E40 has now failed (also at 6 years). Maybe it is just a coincidence. Maybe not. But clearly the E40 was a 1 to 2 year bridge ECM to the E38/E67 and may have not been GM’s best effort. Friends in the ECM repair business say no one is repairing the E40 because of the way the PCBs are made. A quick search finds very few E40s available (at about $500 each). Those same friends say the only units available are take-out units that have been cleaned up and tested. So I asked myself if there is an alternative to either an expensive old-age ECM or having expensive yard art. Another friend in the business says he heard that someone has successfully swapped an '04 Vette 411 ECM into a '05 Vette. 1M 411s were used in so many platforms across so many years there must be a gazillion of them. Swapping E40 pins to 411 pins and loading the two 411 connectors would be a lot of work w/o a reasonable chance of success. So I have a few questions: Does anyone know if the serial and GMLAN protocols are common across those two years? What about BCM / ECM OS compatibility? Has anyone really done this and did they document it? If they did, did they need a TECH II or some such device to make the switch?

 

I'll bump this TTT but I think you'll be hard-pressed to find someone who knows that answer. In any case, I'd PM/EM "cclive" Chris , "HOXXOH" Tom, or "FortMorganAl" (note: the last letter is a small L)

 

That's for the referral, Bill, but that question is way above my pay grade. I'm not a know-it-all, I just play one on the internet.

I would try Tech-Performance forum but expect a slower response over there.

 

Same here... I don't even know what an E40 is....

 

E40s leave some to be desired over an E38 and needed a few work arounds if you were performance modding. E38s and E67s opened up the door, but Speed Density can stump some tuners until you get VE down pat....

If you're talking straight engine management, why not simplify it with an aftermarket ECM? The challenge is getting other modules like BCM talking. Actually, better retract that unless you're going full track where you can strip everything else out.

On another note - have you looked into a rebuild on the E40? That might be an option. Check with Chuck Cow. He might have a solution.

 

Guys, guys---shows you how far out of it I WAS! When I first read the title, I thought: "Why is this fellow asking a question about a BMW or MB?" Fortunately, I didn't admit my ignorance...right away.

Blindspot tho has a good idea and suggestion: rebuild. But I wonder who does it, nationwide?

Just did a google; may not be a good source but here it is: https://www.google.com/search?q=GM+E....0.Ko676oDhfwY

 

There are two possibilities for repair. Took a while to shake cobwebs loose.

Chuck Cow is a definite possibility - Chuck has a program where he does ECU swaps, if I recall. If the OPs ECU is not bricked, Chuck might have an answer.

DSX Tuning (supporting Vendor) - is an ECU expert. He might also have an exchange, a purchase option, or something. Look him up. He is occasionally on Tune forum.

The real challenge with the E40 is it was pretty much a unique/dead end platform with limited use, so there might not be a lot of support in the repair/exchange world. I've not touched or looked inside an E40 and can only relay what I've heard.

 

There is not really another option right now. I have some E40s if you need one and can (and usually do) send them

out with CoW BOOSTERS! installed when they die on people.

Charge systems problems or dead batteries are the most likely cause I assume, but they are the most temper-mental

of the Corvette controllers from what I've seen... Lately I have trouble keeping them on the bench.

I'm kinda short on free time but...... I have been sorta working on a simple solution here and there as time permits.

This thread has sparked some new interest in the "E40 winter project" I've been fooling with.


Please keep me in mind if you need an ECM and either way, it's something I'm going to work on finishing up

just as soon as I can get around to it.

914-332-0049

Thanks for the mention here guys!
Chuck CoW

 

As of recently, I have a good many of these.... Please call me with your situation and hopefully you've done some reasonable diag in advance.

I'll get you back on the road !

Chuck CoW

 

Do you have a solution for the MAP limitations on the e40 ecu? Also, I’m adding a flex sensor and remember hearing the connector is GM specific. Is there a part number for those particular crimp on connectors? Thanks for any advice you might send my way.

 

Wow....2019...I was a young man then....

 

I’ve always been a day late and a dollar short