milliemoo

anyone have a clue as to what causes my bug-eye to hold its revs for a split second when changing gear.is this normal?its best described as if im holding the throttle on while changing down or up the revs will stay where they were and in some instances they will rise by 1-200 revolutions.it manly happens after some spirited driving.also,is there any point to me fitting a fse fuel regulator i have in my garage from my legacy.its fully adjustable and like new.shame to have it sitting there doing nothing.worth fitting or not?thanks everyone.

dunx

iTrader: (3)

Check to see if the throttle cable is sticking, after that it's possibly the TPS, (Throttle position sensor) which will show up on an ecu diagnostic check (?).

Regulator is optional if the car is standard. IMHO

dunx

will_wrx

My 2005 WRX does this also, I cant find any reason as to why it does it so far.

Strange.

D1CCY

My Focus runabout does this as well, my ford expert tells me this is normal. To reduce emissions the ECU holds the idle bypass (tickover) valve open momentarily to put more air through the engine when main throttle is snapped shut preventing rich mixture and CO/HC emissions, yes its a pain, blame the EU (not the ECU). My remapped Blob STi doesn't do this as a result of the remapping, a pleasure after the Focus.

scoobyc

iTrader: (2)

yeah my focus does this too. pain in the ***. Not as much as the 600 rpm rev drop tho. try doing a hill start without the handbrake with only 600rpm to play with on a 1.8 engine :S