my car seems to be running rich on closed loop,when i disconnect it,it makes no difference,its reading between 11-12 on the afr meter,it does go up a tad when i put on headlights etc.
Any pointers to look for?maybe dodgy pf09
cheers all

i have checked the lamda ,and seems to be fine

 

Have u tried tweaking the co pot?

Car must be over 70 degrees water temp to be on closed loop and afr around 14.7.

Faulty cps?

 

what is a cps ?

 

Crank position sensor mate

 

Sorry coolant temp sensor not crank.

 

Haven't you changed engine spec.

Mark

 

Your AFR is roughly what mines is but I don't have closed loop, it actually used to running around 14-15 at idle but the mapper didn't like it.

Did your used to run a bit leaner and now all a sudden it's rich?

 

spec still the same at mo ,msd380 chip,want to change.I'm having issues with prop alignment at mo,although hopefully sorted now.
Had to take engine out again today,to adjust clutch form arm,5mm.
I'm slowly losing the will to live with the car at mo.

 

It all of a sudden went rich,went for mot yesterday,the guy said it was 20 times to high,so bypassed that test.