Need MEFI-3
 

Don't have one to sell, but if your going to have it reflashed, then you can use other part numbers like

16237019
16236999
12489488
12489493

send a pm to tunertech ( Ben ) on here, he usually has some, I sent him a text about your post

I have one from a 500EFI

Whats wrong with yours ? its a 50 / 50 to repair the MEFI s.

2001 Cobalt 226. Ran fine 2 weeks ago, wouldn't start last weekend. Everything on the dash has power and motor turns over but wont start and fuel pump not priming when key moved to on position. Had a fuel pump replacement 2 years ago so I thought that would be a possible culprit. Replaced the fuel pump with a cheap one I found on ebay, no change. I then realized that previously when I turned the key to the "ON" position not only would the fuel pump prime but I would also get 2 audible beeps from the engine bay. I no longer get the beeps. The only thing I can hear is a relay click from the kill switch... Snugged down every ground I could find and checked all the fuses. I oddly did find a blown 40 amp fuse which I believe is for the trim actuator and relays... I wiggled all the plugs and connectors back there with no change as well. Batteries both have good 12.5+ volts. I pulled the ECM harness and was able to ground out the pin for the fuel pump and could hear the fuel pump prime. Also checked the 12v ecm pin and had good 12v there. Im about at the end of my mechanical knowledge especially regarding fuel injection systems but I think this is leading me to a fried ECM....

Colbalt use Volvo Penta 80 percent of the time. So which engine and model do you have ?? The Volvo TUNE will not be the same as the MERC tune in the ECM.

INDMAR and PCM all used MEFI / MEFI 3 and those tunes are NOT a plug and play for other marine brands. They did fault for general warning 1 and 2 and one side of that was for transmission temp.

Was the alternator changed on this app recently ?

flash alone is prob 500 bucks - BARE MIN

And man I guessed right VOLVO PENTA and without that info you were leading down the wrong path for sure.

Why I posted the question cause I knew the odds were a VOLVO.

in 2001 VOLVO used MEFI 4 so your engine must be a 2000 or back

Hull year MEANS ZERO.

And I will preach AGAIN -- this is why ENGINE SERIAL NUMBERS ARE SO IMPORTANT . -

Volvo set up and harness adaption is not the same as MERC so watch out the info you are getting on the forums. NO offense but it can be dart throwing.

All 5.7 GXI-A engines used MEFI 3. Year and make of the boat is moot as long as you know the model of the engine. My boat may be a 2000, I'm not sure. I found a guy in CA that works on them and flashes them for a fee. Diagnostic on it to see if it is bad or not is $80, repairing the MEFI 3 can run from $100-$500, flashing a replacement that I find is $300. The only work we have done to the boat has been a power steering pump and a fuel pump. Everything else is original other than spark plugs, oil, and filters.

lets us know the final bill

INFO repairing MEFI s is 50 / 50 --- I know I perform ECM and PCM repair - Love to see someone repair one for 100 bucks. I have never seen that happened. Hell its 100 bucks to get the darn thing completely open properly for the repair. Just saying

Said the engine must me 2000 or back not the hull - Hull can be newer than the engine

None of your buddys have a boat with a mefi3 you can try? If your convinced your ecu is the root of your issues you could stick any mefi3 off another running engine and it would at least fire IF it was the issue , id try to do THAT before I started spending money!

I have one with an MEFI 3 but his isnt flashed for my engine so I'm a little reluctant to run it, also a little reluctant to use someone elses in the case that I have a fault voltage regulator from my alternator and fry his ECM.... I think it's probably best I just have a diagnostic ran on it by a pro and be out $80.

I have a MEFI 3 I would sell also, but not tuned for your engine. It is from an Innovation 600

Don't run his good ECM on your motor, run your suspect MEFI on his motor. This way if there is something wrong with your motor, it won't damage his good ECM.

You said it won't start, so if your motors are close (both SBC) you could give it a go. Don't run it on the water, just see if it will start

As for a reflashing, if you can find someone with the same motor (or Bob at OBD) the BIN file can be downloaded from that one and uploaded to reflash it. I have the software (MEFI Burn) but never tried to do that on a bench, but would do it for free if I could figure it out. Shouldn't take to much to do it, ECM needs to be powered up, and connections to the data link need to be connected. Might be more to it, but sure is simple enough to down and up load on the boat.

Wonder if your BIN file can be downloaded even if it does have an issue.

I just dropped my ECM in the mail to Bob. He is going to test it for me and ship it back. I wouldn’t have a way to get the bin file of my unit ends up being dead but thanks for the offer! May wait and see what bob says about acquiring the bin for it.

Never know, after all these years he probably has the file
Hope it turns out good for you

for starters its a TBI 2 injectors for the induction side of things. And there is alot more to this motor that is not vastly shared like a Mercruiser small block.The ecm is not a Merc small block tune. Worked on these exact Volvos - plenty in the past but is a rare app.. The engine made the cut for being a MEFI 3.

A scan of the engine would be a good start as well.

I have a Mefi 4a if anyone is looking for one.

Got word back from ODB diagnostics. ECM is fried, going to need a new one. So I'm officially in the market.

what is wrong with the ecm ? will not communicate ? micro processor bad ? circuit board damage ? or ?

Who has the the correct calibrated tune for your Volvo ? Its a rare one. just saying.

I've got one. Got it with some other parts as a whole deal. Guy said it was good. I will take $100 plus shipping. If it is junk, return it for a refund. I take credit cards if that helps.PM me. I can send some pics. Can't load them here for some reason.

Smitty

If the OP doesn't want it I'll take it. I'll load my tune on it to verify it works.