JustHonda2

I just put a 96 d16y8 in my dpfi 1990 hatch, i used a do it yourself boomslang harness. Everthing works and it idles fine but when i rev it un nutral or driving it, it rev limets at 4k no matter what (im using a p28) please any ideas???

lazy14

is it a automatic ecu?

JustHonda2

Dot think it is looks like a manual do they liok like the same case?

sirtef9

iTrader: (4)

CEL's?

JustHonda2

actually didn't think they would be accurate im useind obd1 inj and obd2 dizzy and obd alternator, any ideas people?

JustHonda2

ttt anyone

titosek4

Couple of friends of mine had a similar issues, turned out to be the o2. One was running a one wire o2 and needed a four wire. Other friend of mine had a fuel delivery issue, might be worth looking into let us know what your end result is

JustHonda2

well my be no i ran a 4 wire o2 and fuel is fine, how bout dizzy? i have heard so much bs from people lol just give me the answers lol its my dd

Nickeg9Ej1

no cels? stock p28 no chip or anything?? on the last three numbers of your ecu part number should say -A_1 if the blank is a 5 its a auto and if its a 0 ifs a manual

JustHonda2

and if its auto?

JustHonda2

and i do have a check engine light on but i have no air intake sensor on mani or iac cause its a auto mani

Nickeg9Ej1

I've been told depending on the version of the ecu some auto's wont allow your to rev past a certain rpm if it thinks its in park.

JustHonda2

that woul suck lol

JustHonda2

so any other idea? i wanna try them all

Nickeg9Ej1

yeah it would, besides that Id triple check the dizzy wiring, and fix whats you know is missing

JustHonda2

ok thanks

JustHonda2

ttt

JustHonda2

ok my cels were injector ecu and iac(which waas unplugged) i tried 3 different ecu's still wont rev over 4000 please help could be wiring harness lol stupid boomslang harness

4drEF

IAC is now hooked up?
Figure out what the injector issue was? (that might be the problem there - might be in limp mode).

Seems you wrote "ecu" as a cel as well??
What is the code numbers you were getting?

JustHonda2

9 14 and something else iac was on but ive tried reving with iac hooked up to

EF_90_HB

hey all . i have a 90 EF with a dpfi and would like to convert to mpfi . is this an easy swap ? has anybody done it . because i am aware that this car was made only for fuel economy but i would like to make a little faster . and my plans are throttle body, intake manifold, intake and headers . but i was told that with the dpfi it wont add much if any HP with these without the swap.

4drEF

Hook everything up.
Disconnect ECU for a few minutes (to clear all codes).
Reconnect ECU and try it again.
Check for CEL and post all the numbers you get.

EF_90_HB

thanks . i mean will the mpfi make any difference?

JustHonda2

i will tomorrow any idea off top of your head though? i think its the boomslang harness

JustHonda2

yes it will especially with aftermarket intake or a d16y8 manifold not a 99-00 on though it will not work