ok guys heres the deal a buddy brought his car to my house with a check engine light. it is a 99 si civic, he said the check engine was for the cat. but after checking the codes it was throwing code 45 fuel system to rich or lean, 67 cat low efficiency, 71 misfire cylinder 1, 72 misfire cylinder2, 73 misfire cylinder 3, and 74 misfire cylinder 4. how might i go bout fixing this any info would be great

 

nobody has any i deas?

 

Are the spark wires hooked up in the right order?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by saleensolution &raquo;</TD></TR><TR><TD CLASS="quote">ok guys heres the deal a buddy brought his car to my house with a check engine light. it is a 99 si civic, he said the check engine was for the cat. but after checking the codes it was throwing code 45 fuel system to rich or lean, 67 cat low efficiency, 71 misfire cylinder 1, 72 misfire cylinder2, 73 misfire cylinder 3, and 74 misfire cylinder 4. how might i go bout fixing this any info would be great</TD></TR></TABLE>

That would be the first problem I would tackle. What mods are done to the car?? How are the O2 sensors? When my car was misfiring, it was almost all related to fuel.......

 

What are his modifications - they wouldn't happen to include the GReddy Blue Box?

 

this guy has a mugen header high flow cat cold air intake and a v-afc which is zeroed out and has been on the car for awhile before it started acting up, but any way i took it to work with me last night and reset the computer and run the dog **** out of it on the way home and the only code its throwing now is the cat which is expected..................still kinda like to know what made it throw the other codes?