civictype-r

i think im having fuel problem,checked everything else.car starts to break up at 3500 rpms.i dont think its the fuel filter.any ideas what else it could be.at a quater throddle it will rev up in rpm but half or more motor breaks up??????

MitsuGTRacing

Could be the PCV valve man... Check it out.

fmrprojects

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MitsuGTRacing &raquo;</TD></TR><TR><TD CLASS="quote">Could be the PCV valve man... Check it out.</TD></TR></TABLE>

that has nothing to do with it. are you throwing any codes. check the tps and see if its witghinn range. seems like its at 1.5 at closed throttle for you and you are not getting full throttle response. check it with a volt meter and at closed throttle it should be .5V and at wide open throttle it should be at 4.5V

JSPECSIR

make sure your fuel pressure is correct, not too high or low. when you say breaking up do you mean missing if so check your plug gaps.

civictype-r

no cel, where is the pvc valve?