Evening all, looking for a bit of advice:

the car is a 2004 Mazda 2 1.3 petroleum engine ( my neighbours car)

they complained the car was cutting out at idle, I suspected a vacuum leak and was correct, I found a 8mm ID breather hose running behind the inlet manifold which had a split in it ( just in between the alternator and inlet manifold)

anyway I replaced this hose and now the car will not idle at all unless you nurse the throttle.

I was wondering if the ÉCU adaptions need to be reset some how ( as the lTFT will be out to compensate for the air leak)

if not any ideas where to start looking ? So in summary

with the air leak hose fitted the car would idle but not always start.

with the hose changed out the car will only run with the throttle nursed. ( in both closed and open loop lambda control)

STFT are showing around -21% when nursing the throttle so I am suspecting another air leak or MAP sensor problem