Hi all..... Pipes here....Tks for all your thoughts. The 2000 Echo's problem, believe it or not, was no one was able to identify the fault, and it has since just gone away........???? Now the engine warning light is on....! and we've now got another fault with the car. Sometimes it just doesn't start. Full battery life, all dash lights, indicators, radio etc., working fine. Mainly when the car is on a hill. We thought it was a stability sensor within the car's alarm system, however, we've re-routed the wiring to bypass the immobiliser and will see how that goes. Once we did this we disconnected the battery and lost all the code iformation, possibly re-setting the computer, as the engine light has gone, and we won't know what was wrong until it returns. Resetting it may have done the trick, including cleaning around the O2 sensors, and MAF sensor. We might sell it before anything else goes.....If we find out in the meantime, I'll post results again. Cheers