Source a "new" E40 ECM?

what year is your car?

2005 acdelco reman

it won't work if you have an 06, btw.

Yep. 2005. You're amazing, thank you. I didn't even bother to check RockAuto thinking they wouldn't have it.

...aaaaaand you got the last one.

in existence.

Nothubertjfarnsworth said:

...aaaaaand you got the last one.

in existence.

Click to expand...

I've got one tucked away just in case...

Nothubertjfarnsworth said:

...aaaaaand you got the last one.

in existence.

Click to expand...

Hahahaha. There's a core charge, so hopefully after I send my old one in, they can salvage it and re-sell it to someone who might need it.

Even more so, I hope this finally ends the saga of the "Safe Mode" gremlin.

Do you still have the original ls2 silver blade throttle body, when mine started to fail it would randomly put the car in limp mode. Just another idea for you to consider. I also bought a rock auto E40 a month or so ago it’ll come completely empty and your tuner will be able to load the vin straight in the first time he hooks up to it with Hptuners. But then he will have to turn off all the Vats stuff and do a crank relearn.

Burn199 said:

Do you still have the original ls2 silver blade throttle body, when mine started to fail it would randomly put the car in limp mode. Just another idea for you to consider. I also bought a rock auto E40 a month or so ago it’ll come completely empty and your tuner will be able to load the vin straight in the first time he hooks up to it with Hptuners. But then he will have to turn off all the Vats stuff and do a crank relearn.

Click to expand...

you can't flash a completely blank ecm with hptuners.

he'll have to flash it with the stock calibration via SPS and link it to his BCM and PIM. then flash it to his modified tune if he has one.

Burn199 said:

Do you still have the original ls2 silver blade throttle body, when mine started to fail it would randomly put the car in limp mode. Just another idea for you to consider. I also bought a rock auto E40 a month or so ago it’ll come completely empty and your tuner will be able to load the vin straight in the first time he hooks up to it with Hptuners. But then he will have to turn off all the Vats stuff and do a crank relearn.

Click to expand...

Changed out the throttle body. I went with the LS3 gold blade originally and it was fine for driving around town, but any time I went WOT, the car would instantly and consistently go into Safe Mode. Tried it over a dozen times and every single time it would go into Safe Mode.

Got an OE LS2 throttle body and it helped minimize the amount of times it would go into Safe Mode, but it still happens intermittently. Some days it’ll happen multiple times a day and then not do it for hundreds of miles after that.

Hoping this new ECU is the cure.

just read back through your old thread.

you threw everything and the book at this problem. crazy it's still going on.

EDIT Never mind, looks like you've already tried my suggestions!

Nothubertjfarnsworth said:

just read back through your old thread.

you threw everything and the book at this problem. crazy it's still going on.

Click to expand...

Yea, I truly didn't want to admit that it was the ECU that was the problem, but it's likely the issue and really the only other thing I can think of. The biggest thing was actually finding one, which is why I'm so grateful that there was actually one available.

My tuner said he'd have no issues with doing the swap, I'd just need to source the new ECU.

I suggested increasing the "error values" or whatever HPTuners suggested, but he said even if that worked, it would just be putting a bandage over the problem. Before it goes into Safe Mode, you do start to feel some slight hesitation.