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Ok so i now have two hatches mpfi swapped from dpfi with the same problem. ALL PINS ARE CORRECT!, the correct a6 dizzy and a6/pm6 ecu was used. the a6 intake mani and tb with injectors, and the tps wires were swapped. Again....ALL PINS ARE CORRECT. Im almost 100% positive that the wiring is correct considering i had a friend whose done 2317280498190248 million of these conversions look at it, and verify this. The problem is that both cars will idle smooth....crank up perfectly fine with no issues, but when when the butterfly valve is opened at any position it will bog almost as if it hits a fuel cut, and if you put it to WOT it will actually backfire through the intake. Ive had shops look at (waste of $) ive had friends look at it(waste of time) Ive scowered forums for weeks (waste of my own time). It is not throwing any CEL's whatsoever now. We reset the ecu since such was eliminated. WERE ALL STUMPED! 2 cars.....same issue.....same motors....and same conversion parts, wired and pinned the exact same....I know someone on here has to have some idea of what this is.

 
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I've been trying to figure this out for you too, I've spent a ton of time searching and talked to all my tuner friends but not I haven't been able to figure it out. it sounds like everything is totally correct! I don't get it..

this is a pretty good write-up, maybe you can find a clue somewhere in it..
http://hondacrx881.tripod.com/mpfiswap.html

 
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ya know whats funny....thats the write-up i used lmao

 
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haha I think it's the best one out there, I've had it in my book marks for a long time.

But damn..

Have you tried posting a thread on D-series.org, those guys have more experience with these conversions than many of us.

 
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i have not....i need to lol