after i drive my type r for bout a hour.. she fouls up the plugs... she gettin to much fuel.. i have the fuel pressure regulator at stock psi (42pis)... but she styll fouls the plugs up... i don't know what is causing her to so rich all the time... can someone help me plz....?

 

something is telling the ECU to inject more fuel than it actually needs. Exhaust leak, bad MAP sensor reading, bad o2 are things that come immediately to mind.

 

check O2 quite possible.

 

so it's possible that the o2 is bad or going bad to cause the car to run rich without giving a check engine light?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by yoorang &raquo;</TD></TR><TR><TD CLASS="quote">so it's possible that the o2 is bad or going bad to cause the car to run rich without giving a check engine light?</TD></TR></TABLE>
yeah its happend to me befor.

 

a flakey O2 that doesn't set the CEL typically doesn't run it to the point of fouling plugs.

are you running the P73? or an OBD1 chipped ECU?