Okay, I bought a whole setup off of someone where I live. I have a 96 civic ex. the engine is a d16z6 out of a 95 civic ex. The engine came with the turbo, 550 RC injectors,p28 OBD1 ECU, vafc, and a vacuum box for the guage, bov, etc. I heard the engine running in the car it came out of so was confident with would be a simple swap. I got the new engine in and wired the vafc into the jumper harness to the p28 ecu. after everything was plugged in i started the engine. I was idling every rough and smoking horribly. I have the settings from his car to set the vafc to get it into a ballpark until i get it professionaly tuned but still no luck. I cannot figure out why the injectors are giving it way to much fuel, I dont know if im missing something with the vafc or what. I have been doing research and was wondering if the fuel injectors are getting too much volts to where they are staying open. If this is the case would a resistor box help. Im sure someone here has done the same swap. I bought all the jumper harnesses needed, One for the ECU and one for the dizzy. so its not a shitty wiring job. any imput is appriciated. Thanks

 

what chip is in the ecu? if its a stock ecu then it thinks the injectors being used are much smaller than what you have in there...

 

Thats why it states its a VAFC build in the title of this thread. The VAFC should lean it out somewhat.

Anyways, back on topic...maybe you wired up the VAFC wrong and it isnt adjusting the fuel??? Maybe youre off by one wire or something? Could be many different things man. Just try to start troubleshooting is all I can say to do. Good luck!!!!

 

in that case, sell the vafc, buy a socketed ecu or chip and socket the one you have and with a basemap for your 550cc injectors....that would be the easiest and smartest way to go...

 

I used a VAFC on my first S/C d16z6 build w/ DSM 450cc inj. Worked great for about 4 mo.

Then I snapped a rod. LOL found out the VAFC is good at helping with scaling down inj. to work for your engine.

But it does not help with retarding ign. timing when in boost.

Sell the VAFC chip the ECU and save an engine.

 

The ECU is chipped. Not sure what chip i will ask the kid i bought it off of. i will go over the wiring tomorrow again but i followed it to right off of apexi website

 

Another thing. I wired the VAFC to the obd 1 wiring. I think that would be the one to wire to because that will be the new computer. So i wired the VAFC to the jumper harness to make a obd2 car a obd1.

 

I have a update... I had it running today and still ran like **** so i took the spark plugs out. cylinder one and three plugs were dry and 2 and 4 were wet. I am getting spark to all plugs tho.. something is not making sense.. I have the firing order right but wondering since i bought the distributor conversion if something is mess uop with the order it is firing them. i put the plugs back in thewires and sat them out and cranked it over and none were firing at the same time. Do 2 fire at the same time or is it normal for them to fire at different times? NEED HELP HERE

 

check your dizzy and see if your injectors are working right **** happens

 

okay so today i found one bad plug. Got all new ones and started up fine.. still idle rought and running rich. i noticed today that the correction rate on my vafc is not changing. This has to be why it is flooding out. i went up the road and it was smoking like crazy. i looked up and fuel correction stayed at 0%. if someone knows anything about VAFC 1 and why this correction rate is not changing causing my car to overload on fuel please help me out. Thanks

 

do you know if your injectors are high resistance saturated or low resistance peak and hold, if they are low resistance you will need a resistor box

 

You adj. the correction rate to rpm level, not the VAFC.

If you are using anything larger than 450cc inj. you will have correction problems.

Also if you are using injectors w/ low resistance you will need a resistor box.