JDM_Kevin

I have a 1999 EK Civic and when i'm driving on the freeway and get on the throttle I get the biggest smell of rotten eggs. I was wondering if anyone knows what that could possibly be? Also, its swapped with a B18B1 and I bought it from a dealership and they said that the guy that had it before me had a VTEC head on it before but took it off when he sold it to the dealership. So when I rev it up it fuel cuts and 5600 RPM which is when VTEC is supposed to hit. Could this mean that maybe I have a VTEC ECU W/ Non-VTEC head, or could it be as simple as a bad ground?

ALLxMOTOR EG

Yep you should not run a vtec ECU with a non vtec head,get a LS ecu.

ALLxMOTOR EG

GL

DLjunky

It might be that your cat is new...

JDM_Kevin

ok so thats my problem then? also what about the rotten egg smell?

nengx07

yup i had same problem.. got new ECU and BAM!!! car ran great.. but i would save the vtec ecu for later uses when u do get a vtec head or swap in...

en00be

dude i know how to fix this

SQUASH!

JDM_Kevin

is the gl better than the ls?

ALLxMOTOR EG

Sorry that part i don't know.

Unseen Racer

remove everything inside. seats and all panels. not side panels. but like the arm rest, glove box and driver side leg panel. clean it all up and add febreeze. then look inside all your air vent to see if maybe there are rotten eggs inside it.

JDM_Kevin

I will definitely save the ecu. thanks for your help dude. but also... the rotten eggs....??? i know its not the cat because the exhaust is completely stock and the dealership didnt say anything about it being replaced. it could have been but i really doubt, i guess ill check tomorrow, any other ideas why it would smell like that though?

JDM_Kevin

lol whatever, it only smells like that when i get on the throttle

94EGKUSH

what ecu do you have?

nengx07

rotten egg smells?? try to sniff it out and trace that smell.. it would suck if it really was an rotten egg

keving85

bad headgasket is known to cause a rotton egg smell..... (blown headgasket)

kev

JDM_Kevin

not sure actually i didnt look, i just presumed it was a vtec one cause it fuel cut at 5600, ill check it tomorrow though, you maybe interested?

keving85

should be a p75 and i think there is another one you can run>

JDM_Kevin

alright ill check the head gasket too, but it wouldnt make any sense because the guy put a brand new head on it before the dealership took it and it had to of been replaced then, unless they were little bitches and tried to shortcut it by using the old one. would you suggest a head gasket change?

JDM_Kevin

i only took a reall quick glance at it and i though i saw p33, ring any bells?

Ran4it2

its the cat
you need a new one

lcsej1

this is funny man how you say rotten eggs all the time! do you have any type of smoke coming out of the exhaust? bluish? white...? black?

JDM_Kevin

alright well ill change the head gasket, the ecu, and the cat then, thanks alot for your help dudes

keving85

i would suggest you do a cylinder compression test and a leak down test..... see if your loosing any coolant and is there white smoke coming from the exhaust... might just be a little hazy......coming out... i know it's winter and all car's seem to smoke.

replacing the headgasket cause i suggested that would be over kill considering i am diagnosing thru a keyboard... lol... i would think your compression would be near 180psi across the board... but considering mileage and such give or take 150psi

kev

JDM_Kevin

no, no smoke coming out of the exhaust, not that i know of anyways, i havent been behind the car while its driving yet

JDM_Kevin

ok its a good motor though, the guy that had it before knew what he was doing, its a really clean swap