thinking about it, it seems strange that you've got all these upgrades on your motor, but with a standard chip.

presumably you bought the car like this?

what colour are your fuel injectors (standard are yellow)?

it could be that someone was running another chip and injectors and changed back to standard to sell it, but you wouldn't normally put an rs500 i/c on anything less than a stage 3 running a t34 turbo (with a bigger compressor wheel than your standard t3 to give more boost without overspeeding), 3 bar MAP sensor and larger than standard injectors.

if i were you, i'd have a look at the ecu to see what you've got. on a 2wd sapph cossie, it will be behind the dash on the passenger side. you remove the cover of the dash that is facing the passenger above the glove box. there'll be 2 ecu's in there, one for the abs, and the other is for the engine. have a look at it and check it against the information in here: http://www.homepages.hetnet.nl/~pete...cs/electronics

you should see if it's been tampered with. if so, open the cover and have a look inside at the chip. before you go behind the dash cover, i would disconnect the battery (don't forget stereo code!) cos you don't want to short anything out.

let us know what you find.