hi there a freind of mine bought an escos form ebay a few weeks ago and the car has turned into a complete nightmere, it needed the head refitting but since this has been done it just wont run right. he has been told its got a 2wd ecu, and that is part of the problem, could this be the case?? it keeps changing the fueling and timing??. he bought the car with out looking at it and has learnt the hard way as its totally rotten as well. any help would be great

 

Yes putting a 2wd ecu on a 4wd car will do this, the 2wd ecu can't run with a cat, as it has no control over it, it is also getting the wrong info from the throttle position sensor, the 4wd ones work the opposite way to 2wd, ie one goes from high to low and the other from low to high when opening the throttle.
It sounds a right bodge tbh.
tabetha

 

It is a bodge to be honest but it's his own fault he never looked at it before buying it theres so much wrong with it. Thanks for the help