i think my rs500 is over fueling what are the probable causes the injectors are standard i think the colour is yellow only one set are connected i am using 57 plugs i have recently put injector cleaner in the car also the car hunts quite bad on start up for about ten mins and then tends to settle down any advice would be appreciated it also has a stage 2 chip

cheers

barrie

 

When my MAP sensor went my 3 dr started bailing fuel at a daft rate.
It wouldn't tick over and was crap up till about 4 grand when there was enought air to go with the fuel.
Rich

 

57 plugs are lumpy when cold and some cossies not run on them try a different set of plugs

 

I had a similar problem and it turned out to be the Idle Speed control valve not working ( big round shiny cylinder thing just after the throttle body on the 500)

take it out and soak the end in petrol overnight, (just the end not the whole thing) and then gently move the flap valve inside up and down lightly with a thin screwdriver to free it up.

or it could be the blue temp sender at the back of the head by the dipstick

 

could also be a shaged act sensor (brown one in plenum) shaged ect (blue one at back of engine) map sensor, or split vac pipe off plenum,