so today was my first go at it and i failed. i passed a smog test about 2 weeks ago but today i failed the evap test. could this be due to having a nissan gas cap on a honda? thanks..

 

bump. and to end my day of failure, i actually just got jumped. pretty whack. someone please have the answer to my question!

 

where did you go....and describe your car.

 

LA trade tech college. 93 dx hatch 93 gsr motor.

 

completely stock btw. with a jdm intake mani, i dont see a difference between the usdm and jdm one.

 

JDM intake manifolds lack a purge solenoid, which btw is part of the evap system, you might want to look into that.

 

that isnt the solenoid that open/closes the butterfly on the mani then right? could you explain what it does please?

 

nvm i kinda figured out what it is.

 

No, that would be the IAB (intake air bypass) solenoid, found only on '94 - '01 GS-R/SiR-G engines. (I know you said yours is a '93, but also that its JDM, so i'll assume its a B18C engine that was produced in '93)

Its part of the evap system, I really can't tell you anything specfic about, other than there are 2 vacuum hoses on it, one goes to the intake manifold, other goes to the charcoal canister.

 

what does the paper say the part u failed on?

 

so the bar stations are open again? ive been holding off on swappin my motor out.

 

its been open for awhile now..i failed my first bar attempt last year in Nov

 

post pics of your current set up (mainly of the intake mani) so we can see about the purge valve and if you have your vacuum lines all correct

 

thanks good to know. will be doing a swap as soon as i find a motor.

ive heard jdm motors can pass bar?

 

yes they can. but they will need some stuff.
USDM ECU
and the ECU will be looking for some sensors. (i can not pull them out of my head right now) so you gotta trick the ECU into thinking the sensors are there

 

After the engine is warmed up (as signaled by the coolant temperature sensor, for one), the computer sends a signal to the purge solenoid valve to open. When the valve opens, vacuum from the throttle body/air intake is applied to the evap system's charcoal canister's diaphragm purge control valve, opening it. The stored fumes from the gas tank now get sucked into the engine's air intake. autozone.com has a decent description of the evap system in general under "emission controls" yada in its free online 85-95 Civic manual.

 

yeah its jdm B18C from 93. thank you.


actually he didnt give me a paper. i failed on the evap test. they said i have a leak somewhere. so they didnt proceed with the test. i did pass a smog test earlier this month aswell..


im pretty sure i dont have it..

 

ifs ur gonna try to pass Bar wit a obd2 then good luck cuz its pretty tough..i failed 3x already wit my jdm gsr in 98 civic...readiness monitors ALL have to be complete, pass visual, emissions

i just got a used cat for my swap so hopefully i WILL finally pass cuz the one i have now is gettin weak causing me to fail emissions at idle wit high HCs

 

After the engine is warmed up (as signaled by the coolant temperature sensor, for one), the computer sends a signal to the purge solenoid valve to open. When the valve opens, vacuum from the throttle body/air intake is applied to the evap system's charcoal canister's diaphragm purge control valve, opening it. The stored fumes from the gas tank now get sucked into the engine's air intake. Autozone.com has a decent description of the evap system in general under "emission controls" yada in its free online 84-95 Civic manual.

Dealing with my 91 Civic now trying to get it to pass emissions (not California's). I have little hope.

 

looks like u have the purge sol hooked up..are you throwing any codes?

 

https://honda-tech.com/forums/hybrid-engine-swaps-18/legalizing-your-jdm-itr-motor-906684/

That's for an ITR, but the procedures are the same. You need to get a USDM GSR intake mani that has the nipple for the EVAP purge solenoid. You'll also need a USDM GSR ECU like the above poster said. You can bypass the CKF sensor by performing this trick:

http://ff-squad.com/wp/?p=309

 

thanks for the info. i dont want to take it too far in this guys thread. but, will be looking to get a jdm gsr motor from venus.

 

Im OBD1.

thanks.

no codes.

 

i have a JDM p72 and the inspector said its fine. "As long as its stamped p72 i dont care" that is what he told me. and he also asked me if my intake mani was JDM or USDM cause he couldnt tell even with looking at the diagram they use.

 

on the bottom of the picture with the two lines running from it?