My 2001 Protege with a 1.6L engine had developed a bad misfire when it's humid or rainy until it warms up, and also when I am backing up in reverse it misfires and stalls even after its warmed up. When it warms up, it runs fine at any speed going forward all day and it idles fine at when it comes to a stop. Put it in reverse, starts missing and wants to stall. Does anyone have any ideas what might be causing the issue? Thanks