P0420 CEL 99 civic si

[BTEC]

get a cat and put ur fuel pressure back to where its supposed to be. 45psi with vac hose off is where it should b i think.

[preferredduck]

get a cat and put ur fuel pressure back to where its supposed to be. 45psi with vac hose off is where it should b i think.

haynes manual says 41-48 psi and since i have mods i took it to 48. after resetting the ecu and driving 20 miles the CEL came on again but it happened when going to redline, i had my g/f behind me checking for smoke etc and there was none. i think my FPR might be set like 2 psi higher than 48 which im about to bump down a couple of notches. i spoke with a trusted mechanic today and he seems to think it may be the sensor and i think i have 2 of those laying around to try. i'm just worried that my cat is fucked b/c of someone sabatoging my swap. it ran out of time and with 10psi too low on the FPR for a minute so i think it may be fouled. so how exactly can i check the cat without taking the damn thing off. like i said i had a phantom o2 sensor code a while back which led me down the trail of a mechanics screw up, and his reply was "bring it in it's 65/hr" thats when i realized he knew what he did. throttle screw was out of whack, timing, etc. but it's been running like a champ ever sinve the fist p0420 CEL. its just RTarded.

keep the ideas coming guys