i just picked up a 90 HF

it has a full tune up, new distributor, 02 sensor, axleback exhaust

it's seemingly running rich and i'm only averaging 30ish mpg and getting alot of carbon coming out the rear muffler. it's also throwing me a check engine light, but it does'nt store a code, and i have yet to get to the ECU under the carpet.

any ideas on waht else it could be?

thanks!

 

pull up the carpet and see what it is saying first

 

oh and if anyone has that write up to tell me what it's saying, that would be cool too.

 

from the FAQ... what the hell, it's christmas

https://honda-tech.com/zerothread?id=468260

 

hey thats my post BTW how is the weather in NH. I'm orginally from Lee/Durham area

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zCivic &raquo;</TD></TR><TR><TD CLASS="quote">hey thats my post BTW how is the weather in NH. I'm orginally from Lee/Durham area</TD></TR></TABLE>

cold, freezing rain.

had some snow storms the last two weeks.

i can't wait to move to SC

 

yup just about how I remembered it. What part of SC you going to??

 

N. Myrtle Beach area, as soon as i get my degree i'm outta here

 

any other ideas why it's running so rich?

 

I'm in Lee/Durham! Home from beautuful Troy NY for the Holidays (Hi Greg).
Anyway, is it running weird, any sluggishness or stuttering? When my timing was off I was blowing fuel like that. I was thinking it could also be a stuck (open) exhaust valve.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by downest &raquo;</TD></TR><TR><TD CLASS="quote">I'm in Lee/Durham! Home from beautuful Troy NY for the Holidays (Hi Greg).
Anyway, is it running weird, any sluggishness or stuttering? When my timing was off I was blowing fuel like that. I was thinking it could also be a stuck (open) exhaust valve. </TD></TR></TABLE>

i've never known it to run right, it had a distributor problem when i picked it up

but it idles good. I just had the timing belt done, so i'm hoping they reset the timing. it better not be a valve, although that would be maybe what's throwing the light on.

i might just be stupid, but it's 12 short blinks

should'nt it have been a long one and two short ones.

 

no most obd0 ECU's only use short blinks so 12 is the code. EGR... I would try some carb cleaners to get some of the carbon out or maybe a new used one.

 

well my girlfriend confirmed that it was 12 flashes

but i dont know how badly the EGR would affect the gas mileage though

 

what else would make this pos run like crap

 

would love to say its affecting it but never used the EGR so have no first hand experience with it... Try cleaning or replacing it reset the ECU and see if its helping. Also if your WOT all the time thats gonna affect gas miledge.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zCivic &raquo;</TD></TR><TR><TD CLASS="quote">would love to say its affecting it but never used the EGR so have no first hand experience with it... Try cleaning or replacing it reset the ECU and see if its helping. Also if your WOT all the time thats gonna affect gas miledge.</TD></TR></TABLE>

can't really WOT my HF, it's about as productive as kicking myself.

i plan on cleaning it and replacing the vacuum hoses around it. and seeing where i end up