mekal wrote:Alright I know this is covered all over the internet, but for my particular application I couldn't find much. Car is a 88crx dx. Its kinda of turned into a little mess. Heres my setup currently obd1 b16a, p28 chipped from phearable, obd1 dizzy, obx 4 wire o2 sensor, obd0 to obd1 ecu jumper harness, obd0 to obd1 dizzy jumper harness. In the future try not bying cdm junk.
I bought the car with a stock dx d15b2 engine and swapped in what i thought to be a obd0 b16a. So i bought a obd0 dx to obd0 b16a harness and was running my car on a pr3 ecu. I decided to convert to obd1 because, 1-more tuning support, 2- because my engine is obd1 lol. How did you convert the car to mpfi? Also what hardness did you by and from who?
So It still has the dx dash harness in it. Im just trying to work with what I got and learn at the same time. Everything is here, I just need to wire it up correctly. I checked the dizzy wiring and seems to be correct (cased the wires with a multimeter) I havent checked the small 2 wire dizzy plug yet thought. Im throwing ecl codes 6 (coolant temp), 10 (Intake air temp), and 22 Vtec pressure solenoid. My question is should my engine start even with this codes going off? Or does the ecu recognize this and not allow the engine to start? Dx dash harness does not matter. Even with those codes you car should still start. Check the basic even if you done so far. Are there 3 grounds on the motor, if so what are they? Do you have spark? Open the dizzy do you see any red dust?
What are the things that need to be switched (wiring wise) to go from a obd0 b16a with dx dash harness to obd1 b16a? With time I can figure this out, I know Ive probably made it harder than what it has to be, but hey Im learning. I just got sick of reading pinouts and chasing wires for the past couple of days. Any help will be appricated. First thing to do is go from dpfi to mpfi. Second would be to added in the jumper harness that takes 2 seconds to do. Last would be to added vtec wiring and knock sensor.
mekal wrote:The dpfi to mpfi was included in the harness that I bought from monotech. The wires were labeled to go to the corresponding ecu pins. An engine needs three things to run. Fuel, ignition, and oxygen (and compression).
I positively have ignition. I checked for spark at the end of each ignition lead.
I positively have oxygen.
I positively have compression. The engine has 50,000 and it ran beautifully before the conversion.
Fuel is questionable. I have obd0 injectors with a resistor box. Heres what i have
Where do the other wires go that come off the injectors? I thought the engine should run even with these codes. I havent checked my second dizzy plug wiring yet, the two wire one. Thats tach and 12v correct? If the fuel setup is good than maybe the ignition is off due sensor wiring. What are the 3 grounds on the engine that your talking about? thanks for your help michael
mekal wrote:well im going to work on it right now for a couple of hours to try and figure things out. Ive got a ground on the valve cover and transmission. They are clean and sanded down to bare metal. The t-start is located where? Does it come off the starter into the fuse box? The distributor is producing spark, ill take a quick peak inside it today. The ecu is from phearable.net i hope its working lol. Havent used it in another application yet. Thanks for the quick responses though. All post update ya when tonight after working on the car.
mekal wrote:there was no ground on the thermostat housing.. I took the engine harness out to extend the wires to make it look nicer and I have 4 wires going into two ring terminals that were bolted down somewhere in the starter area(which is close to the thermostat so I tryed grounding those to the thermostat still nothing. I cant even get my cel to throw codes at me consistantly. Im grounding out the SCS wire to read codes but it will only throw codes out every once in a while.
I checked spark again and this time with the plugs on, and still had spark. What do you think about my fuel injection setup? Should i have to modify the wiring on that in anyway going from a obd0 b16a to obd1 b16a? Ive got the obd0 injectors w/ resistor box.
mekal wrote:car ran fine on pr3 and obd0 equipment. How likely is it that a ecu chipped from Phearable.net is bad? I mean they are a pretty reputable company. I dont know still looking for someone with a cheap obd1 civic ecu or one to barrow. No one around me has hondas lol. They put in a zif socket so cant i just order another chip and put it in if i confirm thats the probelm. More troubleshooting is needed in the mean time.
thanks for your help though
mekal wrote:how much is it to test?
mekal wrote:thanks for the info
hey do you have a obd1 ecu i could rent from ya?