94ex_b18b1

I have a 94 civic ex. with a b18b1 swap. the evap purge solenoid is not hooked up because i have nothing to plug into it.... when running i feel a bit of vaccum coming from the breather tube on the sensor. also when running it idles 2-3k until its warm and the falls to normal around 900. i have retarded my timing, searched for vaccum leaks. which i have a small 1. anyone know why its doing this?? or if the evap purge sensor is necessary with my set up?

rick_rabies

you dont need that evap dealy. unplug it, unhook it from hoses. and throw it away and cap the hose to where it goes.

Matt93eg

I had the same issue. I have been driving for over 1 1/2 years on my LS with the purge valve not hooked up. Everything I found at the time I was doing the swap said you didn't need it. I know my OBD1 P75 does not look for it as I get no CEL. My idle use to be bouncing up and down when cold and smoothed out when hot. I cleaned the Fast Idle Thermo Valve on the bottom of the Throttle body and cured the irratic idle, but it still on a cold start up idles usually between 1800-2000RPMs and once warm drops to around 900 as well. Engine runs great. I will stick around and see if anyone else has any other insight on this.

Matt93eg

Cool deal, I need to find something to plug the hole in the intake manifold where it goes so I can just get rid of that ugly black valve.

rick_rabies

autozone,
by all the pvc plugs and little duhickies. they have dif size black rubber caps

Matt93eg

Thanks for that very nice info Rick

EDIT: Oh, I see your not Rick. Well, thanks whoever you are then.