hey fellas just need a little advice here.. i swapped a 99 d16y8 into my 98 civic lx, everything is running fine,(or so i think) but none the less, i feel i am running to rich and i get about 17mpg it eats gas like a v8.. i dont know why.. i was browsing around the net and my spark plugs look just like this..

the tip looks just like that and my ring is always dry black
so thats bad right?

now isnt the my ecu supposed to calibrate my a/f ratio? why am i running rich

(i am running the proper ecu p2p) so i dont know why i have this problem and if im running rich, what can i do about it?...

P.S: my engine doesnt have much pull under 3krpm if i floor it i have to wait till about 3500k then the engine surges with power till redline.. (rich?)

 

have you kept up with your maintaince such as oil change, change fuel filter, air fliter, plugs, wires, cap, rotor and so on....

 

i have an msd blaster 2 coil along with its cap,and msd wires which was installed about 5 months ago, and i got a fresh msd rotor in for about a month now..changed my oil 3 weeks ago, (seafoamed it last week), got a short ram with a fresh K&N filter.. i got extra ngk plugs but i dont want to put them in yet. because im not sure whats going on with the engine.

vac lines look ok.. not sure whats causing my shitty mileage and rich engine..idle drops a little bit after warmed up.. 400-500rpm..

 

my spark plugs look like that too in my y8, but I'm not getting 17 mpg

 

you're running a stock igniton with a blaster coil??

 

dont know the exact mileage but i set the trip meter back to 0 when i got my tank filled up, i was at half a tank when the trip meter said 140, how many gallons is a 98 civic tank?

 

yes stock ignition system just changed to an external coil. never read anything bad about doing that

 

o2 sensor?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fdjizm &raquo;</TD></TR><TR><TD CLASS="quote">yes stock ignition system just changed to an external coil. never read anything bad about doing that</TD></TR></TABLE>

I've never heard anything bad about doing that either, but I wouldn't do it, I have had a bad experience with MSD I will NEVER use another one of there poorly made products ever again

140 miles on half a tank, thats like 25+ mpg, I think the tank is 11 gallons

edit: tank is exactly 11.9 gallons

 

your 02 sensor are hooked up correctly, and then itll start working properly

 

just changed the o2 sensor that was bad... but i got a new denso one.. actually had to run down to my car and take a pic.. what do you guys think? bad mileage??..
http://www.putfile.com/pic.php?img=3339128
http://www.putfile.com/pic.php?img=3339127
my o2 is hooked up correctly i checked i unplugged it and got a code.. so i know the ecu knows its there.. havent got a cell for a while..
thats 183 kmh? shouldnt it be miles?? dont know but i reset the trip meter when i filled up the tank and this is where i am at now after 183 whatever's


(yea i know its auto )

 

you're getting ok gas mileage, a manual would get better

 

ok so my gas mileage is decent i guess. but what about the rich condition?.. what would cause this..

 

do you drive mostly on city or highway? is your transmission shifting fine?

 

lets just round out and say at empty i would have gone 200miles
my tank is 12 gallons that would make my mpg 16.6, thats horrible.. anyone else have shitty gas mileage... i heard of civics having like 30mpg.. what happend?..

i go to and from work everyday, but on fridays i travel maybe 30 miles the whole weekend and watch my gauge go from full to empty in too short a time and my trans is shifting kind of hard.. but its the d16y7 trans with a d16y8 engine (auto) so i think since the p2p is intended to be used for the d16y8 tranny i guess thats why its shifting hard..

 

anyone else have mileage issues and know any causes or fixes??" if i wanted a v8 i would have bought one..

 

well do you feel all the gears shifting? you might not be hitting overdrive. did your check engine light turn on?

 

wow, i just gained 20hp...the ground to my alternator was loose and was arcing. the rubber boot has a burn hole in it, i took it off and cleaned the terminal screwed it back on real tight.. wtf its like a new car, idles at exactly 800rpm.. and no more o2 code.. damn.. and i seemed to have gotten my gas mileage back

 

my ***** doing something similar i got 158 miles to 3/4 of a tank... i always forget to reset at full...
its got NO power especially after 2nd
idk wat to do...
it sounds horrible.. if its major im gonna wait it out till i can get mounts and a clutch for b16 but if theres some simple stuff i can do id like to...