Re: exhaust effect idle?
Yes, exhaust size change idle speed...at least on mine. I change to 2 inch piping from mid muffler towards the back and moticed a slight dddrop in RPM but my idle is still fine. no erratic idle. Wish I had more money to put in a header though....
not sure about the o2 sensor 'coz we don't have emission control here in Malaysia..... at least for now.
Suzuki Samurai (SJ413 Jimny in Asia)
K&N Air Filter, Shackle Lift, Larger Than Stock Tires,Wheel Spacers, Driving & Spot Lamps, Gabriel Gas Ryder Shocks
Kuala Lumpur, Malaysia