Hf-->Dx...probs

[lucentinjection]

I'm in the process of doing an HF to DX swap in my '91 CR-X, let me tell you it is one problem after another...it runs and idles, but it runs like the ignition timing is all off, and i have it all the way advanced (i think), anyone have any ideas what might be the problem here? i'm using my HF intake manifold and i have an Si computer, does the exact same thing when i install my HF computer...also exhaust is running off the B-pipe (4-2-1 header/pipe)

[amy@af]

what dizzy are you using?

[lucentinjection]

if dizzy means distributor, im using the HF one...im almost positive that the HF and DX dists are the same, could be wrong tho

[amy@af]

nope. hx & si = MPFI. dx = DPFI

did you do the wiring for the MPFI? you need to relocate c1 & c2 to b10 & b12 at the ecu plug. and run 2 wires from dizzy to c1 & c2. if you already did all that and it's not running right, you might have c1 & c2 backwards.

[1PhatCX]

^ that always confuses me when i read it hehehe

from what i gather he has an hf and is installing a d15b2 (dx motor) into his car. so he wont hafta do the mpfi swap. it might be a timing belt issue that he's having. fouled plug, bad wire, bad injector, something, give us more symptoms to go by

[lucentinjection]

alright...it runs and idles fine, but when i put load on the motor (acceleration) it bogs and sputters and runs like shit...it revs fine if its not being driven, meaning if i rev it standing still it goes fine...everything points to ignition timing, and i think i need the DX distributor...but i could be wrong...im using the stock HF wiring harness and intake manifold, Si throttle body...plugs and wires are good, no check engine light....so im pretty confused

[lucentinjection]

timimg belt is good too (that i know of) but if its off a tooth or 2 could that be causing the problem?

[amy@af]

do you have a hf or a si?

you need to keep the same dizzy with the same ecu. if you have a si ecu and using a dx dizzy or vice versa, that is your problem

[amy@af]

http://www.binghamtonlife.com/manual/manual.htm

[lucentinjection]

the thing is, when i hook up my HF ecu it does the same thing.....same ecu as the dist....

[91civichatch2571]

check the timing as lady posted

[lucentinjection]

ya u guys were right...timing was off 2 teeth at the crank..now its idling weird i think my EACV is messed up, revving up and bogging down

[]{iwi]

that may be a vaccum leak

[amy@af]

idle speed out of adjustment?