CIVIC4G.COM Menu header
Page 4 of 7

DPFI to MPFI Conversion

PostPosted: Mon Sep 08, 2008 9:48 pm
by Geoff92
sorry to be so newb at this, but is this basically to switch the IM from an SI onto a like CX/DX D15? (so i need a im, dizzy, wiring harness and the si ecu? cuz i can get this stuff like free i just need to know very shortly)

DPFI to MPFI Conversion

PostPosted: Mon Sep 08, 2008 11:22 pm
by classictuners
yes you'd need an IM, distributor, ECU, and a little wiring. A si wiring harness won't just plug into the DX cabin harness and work, it's easier to modify the dx harness. The only reason you'd need a si harness is for the 2 additional injector plugs, and resistor box.

DPFI to MPFI Conversion

PostPosted: Sun Sep 14, 2008 5:31 am
by Geoff92
"classictuners" wrote:yes you'd need an IM, distributor, ECU, and a little wiring. A si wiring harness won't just plug into the DX cabin harness and work, it's easier to modify the dx harness. The only reason you'd need a si harness is for the 2 additional injector plugs, and resistor box.


about the harness, i mean i just have one to pull parts off of ;) also does it matter what year ECU it is? i think mines from an 89? i think it might be stamped on the casing, also how can you tell if your ecu is from a manual or auto?

DPFI to MPFI Conversion

PostPosted: Tue Oct 07, 2008 12:14 am
by r4BBiT
i got today almost everything for my swap, i found a ED9 CRX and it got PM6 ECU, whole MPFI intake, resistor box and some plugs. There still is a throttle cable on it, but distributor is gone (I had to leave to and didnt get a chance to grab throttle cable). Im not sure if the crx parts the same as civics? And is is there any other models (integra or prelude??) that distributor will match my setup or do i have to find SI disitrubutor??

DPFI to MPFI Conversion

PostPosted: Tue Oct 07, 2008 1:30 am
by classictuners
the crx si and civic si both have the same d16a6 engine, so yes, all the mpfi parts should work fine, make sure you get the right dizzy though, which will also have to be from the same motor (not the dpfi motors), there may be other engines that have dizzy's that will work but i'm not sure 8)

DPFI to MPFI Conversion

PostPosted: Tue Oct 07, 2008 1:46 pm
by r4BBiT
I found the following on wikipedia:

D16A6 Also known as D16Z2.

Found in:
1988-1991 Honda Civic Si, CRX Si, Civic Wagon RT4WD
1990-1991 Honda Civic EX Sedan
1988-1995 Honda Civic Shuttle RT4WD (UK/Europe/Asia/AU/NZ)
1989-1996 Rover 216/416 GSi (UK/Europe)

So if i take distributor from any of these models it should fit?

wire

PostPosted: Wed Oct 08, 2008 6:26 pm
by d15b2ef9sir
is there a wiring diagram picture where labled the A7,C1,C2,A3 are exactly on the harness plug for the ECU?

DPFI to MPFI Conversion

PostPosted: Thu Oct 09, 2008 6:46 pm
by cougar289
Will the resistor box out of a late 80's early 90's honda accord work for the mpfi swap?

DPFI to MPFI Conversion

PostPosted: Thu Oct 09, 2008 7:15 pm
by Jaime 91siB18
As I understand it, yes it will, but I'd just get the period and model correct one anyway.... that's just the way I am.

DPFI to MPFI Conversion

PostPosted: Fri Oct 24, 2008 3:50 am
by cougar289
Is a distributor plug from a civic/crx si needed, or will the DPFI distributor plug work?

DPFI to MPFI Conversion

PostPosted: Sun Dec 14, 2008 6:14 am
by r4BBiT
Im just wondering what is the highligthed thing called on a pic and am i suppose to hookup it up to something when i do my swap?

Image

Is it Fast Idle Solenoid Valve? crap i already moved the B2 to wire :(

DPFI to MPFI Conversion

PostPosted: Sun Dec 14, 2008 8:04 am
by cougar289
"r4BBiT" wrote:Im just wondering what is the highligthed thing called on a pic and am i suppose to hookup it up to something when i do my swap?

Image


Mine had it too, I didn't hook it up to anything. I think its a fast idle solenoid for temperatures under 14F or so.

DPFI to MPFI Conversion

PostPosted: Sun Dec 14, 2008 8:38 am
by r4BBiT
Thanks, i thought so. Its also got a blue, black/yellow wire so i must be Fast Idle Solenoid Valve. 14F thats -10C, almost every night right now. I should probably hook that up. I guess i gotta go to the junkyard and get one more ECU connector to do that.

DPFI to MPFI Conversion

PostPosted: Thu Jan 08, 2009 5:20 am
by Dave
hey, i am really considering doing this due to all the problems i have had with carbs, but before i start i would like to now a ruff costing of all the stuff i would need otherwise i might run out of money half way through and not have a car. :cry: :

DPFI to MPFI Conversion

PostPosted: Thu Jan 08, 2009 6:26 am
by r4BBiT
it cost me about $250 for all the parts and supplies, mind i replaced throttle body gasket, dizzy o-ring and all injector o-rings, cushions and seals (which were about $60 just for the injector stuff), i also replaced all the tubing and clamps (but i got 5 finger discount on ECU if u know wat i mean ;))