Re-Programming MEFI 3
03-02-2023, 11:48 AM
#1
Re-Programming MEFI 3
Looking for someone to re-program my ECM.
I’m located in Illinois about an hour south of Chicago with an 2001 Donzi ZXO with twin 350 mag mpi’s. The motors have prochargers with 5lbs of boost, aluminum AFR heads and mid cams. The current programs are real fat on fuel. The Ecms are MEFI 3 (E-930) Delphi 16236999. Any help would be appreciated.
Thanks
Tim
I’m located in Illinois about an hour south of Chicago with an 2001 Donzi ZXO with twin 350 mag mpi’s. The motors have prochargers with 5lbs of boost, aluminum AFR heads and mid cams. The current programs are real fat on fuel. The Ecms are MEFI 3 (E-930) Delphi 16236999. Any help would be appreciated.
Thanks
Tim
03-02-2023, 12:15 PM
#2
Platinum Member
Platinum Member
Contact Smitty ( Articfriends ) on here...........well poo you cant pm till you have 10 posts, Im sure he'll see this. Are they password protected ?
Last edited by F-2 Speedy; 03-02-2023 at 12:18 PM.
The following 2 users liked this post by F-2 Speedy:
articfriends (03-03-2023), Gimme Fuel (03-03-2023)
Charter Member
The following 3 users liked this post by Griff:
03-02-2023, 05:35 PM
#6
Platinum Member
Platinum Member
I think Smitty is in Frankenmuth MI........I told him about this thread
The following 3 users liked this post by F-2 Speedy:
03-03-2023, 05:48 AM
#7
Registered
eddie young... young performance.
The following 3 users liked this post by PigNaPoke:
03-03-2023, 06:11 AM
#8
Registered
Eddie did mine 5 years ago. Top Notch, Awesome Experience. Dyno'd Tuned and I dropped them in the boat. They were perfect. Worth the trip to Tennessee, plus I had a few nights to play in Nashville.....lol
03-03-2023, 06:17 AM
#9
Platinum Member
Platinum Member
Your engines need tuned IN the boat. Pretty sure Bill at Ateco is closest mefi tuner to you (if he still does this). I do it here in michigan but would be quite a jaunt for you.
To do it properly, you need:
1. o2 bungs mounted in exhaust
2. fuel pressure gauges at helm
3. Fresh plugs, wires, fuel pressure regulators that are EVEN at each engine , basically dont take your boat to a tuner until you 100% have taken care of every small issue. since you own mefi burn, use mefi scan and make sure all your data looks correct on every sensor. I have had quite a few people haul their boats here to meet on water to tune and it turned into fix problems at dock that should have been previously addressed that just burned time.
4. Since you'll be tuning off tail pipe averages, pay someone that has a high quality injector machine to flow , clean, verify injectors are good. Tailpipe averages can send you down a rabbit hole of making a ashtray out of a piston as they can mask a lean cylinder.. Dont assume because it idles "ok" or they were recently new that they are"matched", cant stress this enough . (I do offer injector service btw)
5. Have you looked at you ECT data on your mefi? Procharger USED to supply ect signal conditioners to trick ecm into thinking motor was cold and drives it down into the ect table as a bandaid vs real tuning. Have engines and harnesses been converted to two bar map sensors and boost tables on your mefi populated for timing vs map, fuel vs map??\
6. Has "two bar" map sensor been turned ON in the tune??
7.. Ecms need to be unlocked otherwise whoever you pay to tune it will have to blank them out and start over.
8.. Did you actually download the bin file or you were simply able to view the live data with mefi scan?
Hope this helps, Smitty
To do it properly, you need:
1. o2 bungs mounted in exhaust
2. fuel pressure gauges at helm
3. Fresh plugs, wires, fuel pressure regulators that are EVEN at each engine , basically dont take your boat to a tuner until you 100% have taken care of every small issue. since you own mefi burn, use mefi scan and make sure all your data looks correct on every sensor. I have had quite a few people haul their boats here to meet on water to tune and it turned into fix problems at dock that should have been previously addressed that just burned time.
4. Since you'll be tuning off tail pipe averages, pay someone that has a high quality injector machine to flow , clean, verify injectors are good. Tailpipe averages can send you down a rabbit hole of making a ashtray out of a piston as they can mask a lean cylinder.. Dont assume because it idles "ok" or they were recently new that they are"matched", cant stress this enough . (I do offer injector service btw)
5. Have you looked at you ECT data on your mefi? Procharger USED to supply ect signal conditioners to trick ecm into thinking motor was cold and drives it down into the ect table as a bandaid vs real tuning. Have engines and harnesses been converted to two bar map sensors and boost tables on your mefi populated for timing vs map, fuel vs map??\
6. Has "two bar" map sensor been turned ON in the tune??
7.. Ecms need to be unlocked otherwise whoever you pay to tune it will have to blank them out and start over.
8.. Did you actually download the bin file or you were simply able to view the live data with mefi scan?
Hope this helps, Smitty
Last edited by articfriends; 03-04-2023 at 04:29 AM.
The following 2 users liked this post by articfriends:
F-2 Speedy (03-03-2023), Gimme Fuel (03-03-2023)
03-03-2023, 08:39 AM
#10
Smitty, I really appreciate all the information from you !! I’m new to this forum and don’t know how everything works but would like to be able to get into contact with you directly?
Thanks
Tim
Thanks
Tim
The following users liked this post:
articfriends (03-04-2023)
