Narrowing down problems .....
K here it is.
motor have knocking sound at idle from rear of engine bay but runs smooth, and gas milage is horriable, funny smell of melting plastic but nothing is melting???
First I thought the noise was a crank bearing but it's been a few
months and has not failed and motor sound fine at anything above idle
so my thoughts are
1). Bad coil or bad ground on coil
2) cats getting plugged and not flowing at low rpm
thought or sugestions from your experiences.