PDA

View Full Version : dx to mpfi swap !!! help !!!


convic23
10-27-2006, 01:35 AM
:confused:
alright i screwed up like usuall heres my dilema i did the dx to mpfi swap onto my crx i have a d16y5 vtec e motor in my crx at first i had a lag issue problem anything over 3/4 throttle and the car would fall onto its nose it wouldnt stall but would just slow down i went to axiom they said to upgrade the intake and fuel pump (i put an si fuel pump in) so i did

i did the swap onto the car following everything step by step that i got off line to do the swap word for word and tagged all my wires in color code so i knew what was what i took the b2 wires and b10 wire and depinned them didnt cut them but depinned them and moved them to b10 and b12 like i was suppose to i cut c1 & c2 and spliced them into b11 & b12 i connected c1 and spliced it into to b10 and c2 and spliced it to b12 making sure to leave everything connected

i attached wires to c1 & c2 and made sure to mark them and run them into the engine compartment like i was suppose to i aslo cut wires to a3 & a7 and ran them into the engine compartment as well i did not however hook up the wires that i cut off @ a3 & a7 i left those two wires floating and taped off under the dash

i extended all of my wires at the tps and eacv i followed the instructions on how to hook up all injectors and i am running standard si injectors and i depinned one wire at a time on my dizzy plug on the dx dizzy and transferred them to the si dizzy plug one by one so the only wires i cut were the ones under my dash and a couple under the hood and followed the instructions on how i was suppose to do it

since i have done this swap i have had problems the car starts up and runs fine my si dizzy is also notched for the vtec head but when i revv up on the car it tachs at like 3500 and starts to back fire and the car is puffing black smoke so obviously a sign of me running too rich i have doubled checked all of my vaccum lines and they are all hooked up

i am just wondering if i screwed up somewhere with the wiring or what any one have any suggestions or ideas be greatly appreciated axiom said they would charge me 65 to diagnose it but this is my backup car and my daily driver since my wife is always driving the truck so i need help and i need it asap some one please help me out thanks chris

already did switch them back to the regular way it didnt help i also swapped the two wires around on the dizzy plug all it did was make it so it wouldnt start i have tried just about everything the only thing left to do is

A: swap stock fuel pump back in
B: double check all my wiring again
C: switch back to the dx intake again ( which i really dont want to do unless i have to )

not sure i have a code for 4, 14, 20 and thats it i cant find my book at the moment so trying to look the codes up

ok just found my book it say this for the codes

4 is tdc crank sensor which is one of the codes that i also had while running the dx setup

14 is electronic air control valve

20 is electric load detector

alright reset the ecu and the codes popped back up i change out the ecu to an automatic si ecu and the codes popped up there as well drove the car and wont revv up past three it seems that around 2000 to 3000 it seems to start dumping gas thats what it seems like

i have already tried adjusting the dizzy i have changed out the ecu and i have also double checked my wiring what else is left anyone with some suggestions



:confused:

4Door Life
10-27-2006, 01:50 AM
i just copied this from my thread on ht talkin about my first motor/trany swap... go to the links and see if they help you...
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/ down there...


yes, i used my Y8 harness, i had to splice in a couple of connectors tho... i used the wireing plugs from my Y8 dizzy and a two wire plug from the Ls... the two wire plug was to convert my IACV into a two wire instead of it being three wires... if your doing this swap you will have to do it also... here is a link for waht i used as well as inside the thread there is another link to show how to bypass the knock sensor and the ckf with ckp... here are both links... BTW, you only have to do these if you want to use a OBD2 ECU, if your sticking with the OBD1 ECU you only have to do the IACV pin out...

http://honda-tech.com/zerothread?id=1029958 <---- ckf with ckp

http://www.honda-tech.com/zerothread?id=1181854 <--- knock sensor

http://technet.ff-squad.com/ckftrick.htm <--- better write up for ckf with ckp

http://www.ff-squad.com/tech/w...8.jpg <IACV repin fix- let know me if you get stuck and i can walk you through this... its very easy...

edit, heres a link to the whole thread if you wish to read it... again it may or may not help, i figure its wrth a try...
http://honda-tech.com/zerothread?id=1637988]http://honda-tech.com/zerothread?id=1637988

convic23
10-27-2006, 02:48 AM
no i was sticking with the obd0 setup

convic23
10-27-2006, 03:10 AM
see i have been on the computer almost all afternoon looking up this information i have been to 4 different sites looking at this information and it seems like i am the only dumbass that screwed this part up to redline at 3000 everyone else just cant get there car to start i dont know anyone with an si ecu except the one that i have thats it all i know is that i am tired and frustrated and have already started to go back through the car lil by lil to check all of my wires from where i started and worked my way out all i know is i have a day or so to figure it out or i have to switch back to the dx intake cause im moving out of state so any help you guys can up with is greatly appreciated other than that i am tired and ready to go to bed to start all over again tomorrow thanks again for the help

4Door Life
10-27-2006, 03:52 AM
my fault man, some of the issuses you were talkin about sounded like obd2...

convic23
10-27-2006, 01:00 PM
hey i dont have aol but i do have yahoo you can hit me up if you want either that or i have to download aim but you can hit me up at
miamore1923@yahoo.com thats my ym and my mail so im still a noob to this site so

convic23
10-27-2006, 01:23 PM
alright like everyone else has said double check the wiring i went back out did that started back at my ecu and found that i hooked 2 of the wires that i was suppose to cut off and leave hanging i spliced it into wiring as soon as i un did them it fired up and now it runs awesome thanks to those that have helped me out appreciate it very much :p

George
10-27-2006, 01:33 PM
nice save. i bet your relieved. Ive gotta rip into someone elses screwups in a obd0 to obd1 conversion this weekend to get my rex runnin right.

convic23
10-27-2006, 01:55 PM
hell yeah i am relieved no more headaches cant wait to take it for a test drive this ought to be a fun thanks again to everyone :bravo: :bravo: