I have a 2003 Acura CL type-s 6speed. Been having issues with every cylinder misfiring, plus random/multiple misfires. Ive cleaned the intake manifold and replace every gasket to it. Fixed a vacuum leak but still running rich. Stft and ltft running around -8 to -10 at idle. Also can hear 1 misfire. Need some help here.

 

Just replace all gaskets from the bottom of the runners up. New orings on both sides of the injectors plus 2 of them replaced with new injector. No missfire but still running rich.

 

Any update on this? I have the same problem, the CEL always reads multiple cylinder misfires. I've replaced almost every thing to do with the fuel system, and it still runs rich.

 

how do you know it's running rich?