2 weeks ago i swapped an obd2b b16a2 into an obd2a 98 ex. I bought a 96 ex d16y8 engine harness off of ebay and then an obd2a to 0bd2b jumper harness so i could retain my p2t ecu. I noticed that my engine was throwing a couple codes, one being p0450 which is an emissions related code and then i remembered that i hadn't put the charcoal canister back into the vehicle so i went to put it in and there was no plug on the engine harness that goes to the charcoal canister (apparently the charcoal canister on some of the 96-98 civics is on the fuel rail rather than behind the engine.) Has anyone else run into this problem? is there a bypass that will turn off the CEL? or do i have to tap into the ecu and run a two-wire plug? Ive looked at the pinouts for my p2t and can't seem to find the ground wire for the purge solenoid. Any help is much appreciated hopefully someone has had this problem before and fixed it rather than just trashing the canister all together

 

I removed my canister and went obd1. Do you have emissions that you have to comply to? My y7 harness has a bunch of evap canister connector plugs.

 

Yeah unfortunately i need to pass emissions, plus i like having the peace of mind knowing that theres no CEL. I plan on going obd1/standalone once I'm tagged historic (maryland) but until then id like to run the p2t with no CELs!

 

obd2b, I don't think the evap canistor is part of the engine harness. I could be wrong but its actually part of the engine bay harness. Your ride is obd2a. I've read some people actually used a p2p obd2a ecu to past emissions and then swapped back there chipped ecu's.

 

I don't know if they changed the harnesses throughout the years but i have the engine bay and engine harnesses for both the 98(obd2a) and the 99(obd2b)

The only harness that has the plug for the evap out of those 4 harnesses is the 99 engine harness.

I actually swapped the 99 engine bay harness into the 98 because it had cruise control, a/c plugs and HIDs that the 98 did not have. but still no evap plug

 

i have no idea wtf is goin on, thread started with the discussion about your engine harness. you just stated what i said will have the plug for evap canistor plug, which is obd2b. the evap is on the passenger side.

 

Okay let me elaborate because apperently I haven't been very clear so far. I cannot use the b16a2 engine harness because it will not work with the obd2a car. The wiring is different and you run into problems with the cluster/reverse lights/ radiator fans. I tried, trust me it doesn't work lol. That's why I bought the d16y8 harness and an obd2a to obd2b jumper harness so i can run the p2t. The problem I have Is that the d16y8 harness does NOT have an Evap canister plug. And neither the obd2a or obd2b engine bay harnesses have the plug either. so I need to know if there is a bypass that can be done to make the ECU happy, or if there is a way to wire a plug for the Evap canister directly into the p2t.

 

And correct me if I'm wrong but you said that the Evap plug was on the engine bay harness? Thats not the case. Which is what I explained to you in the previous post. I already knew that the obd2b engine harness has the plug but that doesn't really help if that harness can't be used in my car...

 

[QUOTE=justinmaccc;50611053]I don't know if they changed the harnesses throughout the years but i have the engine bay and engine harnesses for both the 98(obd2a) and the 99(obd2b)

[b]The only harness that has the plug for the evap out of those 4 harnesses is the 99 engine harness

Run it to the ecu directly. Get the obd2b pinouts and circuit diagram and run it.

What confuses me the most is this part

Damn car never came wit HID period

 

You're right the car didn't come from the factory with hids but it did come from the previous owner with them. That has nothing to do with this thread. I was just stating that both the obd2a and obd2b engine bay harnesses have been in the car and neither of them had the Evap plug. I'll do some more research when I get off work and try to figure out how to wire it into the ECU.

 

Because the canister sits on the passenger side and that is where the 2 pin plug would be, Near the battery. You probably don't have it wired directly to the ecu and that is why you the cel light for it. Your obd2a engine harness doens't have it, so again, you will have to run it directly.

 

Bump anyone else have an opinion? there has to be a plug for a purge solenoid SOMEWHERE whether its on the engine harness or somewhere else. Obviously all cars that have a purge solenoid need a way to power them. please help i have to pass inspection in 30 days.

 

You went from evap canistor to purge solenoid...

Do you need both or or either one?

 

Were you able to find a way to power the purge solenoid? What did you do?

 

I don't think the evap canistor is part of the engine harness. I could be wrong but its actually part of the engine bay harness. Your ride is obd2a. I've read some people actually used a p2p obd2a ecu to past emissions and then swapped back there chipped ecu's.[/QUOTE]

so if switch obd2 to obd1 i can delete evap and purge solenoid? Cap the intake and pass emission?
Test?