So I found my dpfi manifold to be really limited and restrictive and really want to swap it out for an mpfi however I do have a few questions and concerns
1.Will any d-series mpfi manifold be o.k?
2.Does the resistor box have to be from an Si?
3.Can I get away with using the PM5 ECU

btw it's a 1991 Civic DX D15B2 w/d16a6 head and cam, thanks for help and tips in advance

 

1. yes im pretty sure any D manifold will work. (not 01-05 D17)
2. no. any resistor box will work. or you can run OBD1 injectors eliminating this.
3. no. use if obd0, PM6 if M/T or PS9 if A/T or convert to OBD1 (will need heated O2 also)

dont forget you need to get a MPFI Distributor

 

1) There is a Y8 version that doesn't have the EACV drilled out but it can be modified to work. Other than that, any 88-00 MPFI manifold should work.
2) I believe 90-91 Integra should work. Older Accords/Preludes have the same style injectors but not sure if the resistor box is direct swap.
3) PG7 ECU (pre OBD) would work reasonably well too but not the best for smog (I've passed with one but barely).

 

dosent pre-obd use vacuum advance distributors? i dont think it would work.

 

pre-OBD is everything that is not OBD1 or OBD2.

So there is both carb with vacuum advance as well as electronic advance.
Electronic advance is what you find on the USDM 88~91 CRX/CIVIC.

 

To clarify, 88-89 PG7. 86-87 Integra has the vacuum advance setup. Thanks for pointing that out

 

thanks for all responses all really helpful and helped alot,one last question, can i just use the d16a6 wire harness just so i dont have go through stress moving pins and messing around with the distributor wiring

 

That is covered in the FAQ but if you think removing even more pins elsewhere is any better than removing 4 or so then go for it.

 

alright thanks all