I don't think the car is performing as it should/used to so I went for a quick blast yesterday with datascan plugged in and set to logging mode. When on idle running rich lights up red, during driving lean lights up green. This can't be right can it.

O2 sensons and everything else seems fine and I have code 55 no faults.

Got cat back exhaust, air filter, greddy profec controller and mines ecu only showing 10/11psi on the boost gauge.

Anyone any ideas/explinations??

Boost leak? I I think this can cause them to run lean?

wouldnt a boost leak cause em to run rich , its fuelled for "x" mass of air , with the leak you arnt getting that so = "rich"?

Are you sure the O2's are ok?

I know I have a boost leak so I replaced my dump valves and put my recircs back on, but the vacume gauge still reads the same -24psi might goto -26 when engine braking.

thought they should read more than that.

 

Are you sure the O2's are ok?

 

O2's are fine cos I've searched and when people are having trouble they describe em as lazy or broke, mine are all over the place.

I'll post some pics up just have to get info from laptop.

First Pic - O2 Sensor Pics both sides 1 on each graph.

Second Pic - Other Info Throttle and Airflow top graph, rpm and duty clcle bottom graph.

Any thoughts? :)