Hi guys

Im experiencing some running issues with my zetec turbo. It been running really well for a while now however recently its started doing something really quite worrying. When decelerating off boost im seeing afr's of 10.8 for a split second then however it swings right round to 22.4 and will stay like this for far too long for my liking.

I have to deceleration fuel cut set too off so i am at a complete loss as to what could be possibly causing this. Its not just happening after boost but even when just pottering around at low speed and loads.

I have a small datalog that shows the boost situation.

Any pointers will be much appreciated

 

It will a high figure on over run as its not fueling then?

 

Are your AFR's ok the rest of the time, on boost, cruise, idle?

You can email me your MSQ and datalog if you wish and I can take a look when I get a sec... frenzy.performance.tuning@gmail.com

 

Due to going off throttle you will jump down rapidly with inlet manifold pressure and probably hit you bottom row which might be set for really low injection rates. You can send me a your data too @ henrivanbeuningen@live.nl or put it on here