recently got a new motor(99 d16y7 5 speed)and a auto to man conversion done onto my 97 civic but i am using a y8 intake manifold and the y7 throttle body.
im using the automatic harness(with all 4 plugs plugged into the automatic ecu) and ecu that came with my 97 civic since the 99's harness and ecu wouldnt work with my car. i dont have a manual ecu yet(ecu's on its way here). i have a greddy 92-95 turbo kit on it also with an intercooler and am using the blue box as the fmu, greddy evo catback, and no cat converter.

my exhaust reeks like gas(probly since i have no cat) and while driving today i backfired a couple times. the timing is set at stock, im running ngk 6f plugs(gapped how they come out of the box) and am only boosting the greddy kit's max(6psi).Only one of my o2 sensors in in(92-95 greddy kit only had one bung for the o2 sensor, other is sitting on my transmission) What could be the cause of me backfiring? Anyone have a solution, im totally stumped and am scared i might mess this engine up

it doesn't do it all the time, just at various times

also another question, on the blue box, the green and white wire, which goes to the ecu and which goes to the wire going to the map sensor?




Modified by devonic at 10:10 AM 9/17/2003

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by devonic &raquo;</TD></TR><TR><TD CLASS="quote">
1. my exhaust reeks like gas
2. What could be the cause of me backfiring? </TD></TR></TABLE>
1. This should tell you everything that you need to know. You are running rich as hell.
2. See #1

 

how do i correct it though? i can't right since im running the blue box?

 

SAFC/VAFC and a wideband for simple correction

 

no cel's with second 02 unplugged? open loop, blue box and no cat...visions of fuel just shooting out ur exhaust

 

nope no cel for the 2nd o2 *edit* and the 2nd o2 is plugged into the harness, its just sitting on my transmission

i'd like to do the safc hack, or even hondata, but im seriously broke now, after engine swap and everything, and it doesnt look like either could be in the cards for a long time, i have some serious debt to take care of

if i took my car to a shop, would they be able to drill into my downpipe and put the 2nd o2 sensor? would that even do anything since the one o2 sensor is already on the downpipe?

 

.

 

you could get a fuel pressure regulator. and turn the pressure down a bit. but that's prolly not a good idea unless you can tune it on a dyno.

being a little rich is good on a turbo car. i would not worry about it. as long as your not puffing smoke.

platinum.

 

yea its not puffing out smoke, just burning through gas. am i ******* up my car by it backfiring?

 

hah! man when i had no cat on my car, i used to scare old ladies when lifting my foot off the gas, sounded like a gunshot i was runing rich like a ****.

 

yea, a couple people jumped yesterday in their seats when i'd go past them and it did it, running hella rich too

i just want to fix it all, but i dont wanna lose boost

 

lol, i have the same problem when i shift above like 3500.
i should be tuning it soon though and it should be okay.

 

yea, i dunno if theres any dyno places in pa around me

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by devonic &raquo;</TD></TR><TR><TD CLASS="quote">yea, i dunno if theres any dyno places in pa around me</TD></TR></TABLE>

Do you live near the Atglen, Kennett Square area? There is a dyno there. Pretty damn cheap too. Can't remember the name off the top of my head

 

yea its not far from me, kennett square is about a half hour ride

but back to the backfire, anyway to lean up my car?