# Damage #2 **URL:** \ **Category:** General Discussion\ **Created:** [May 30, 2014, 3:46am UTC](https://community.cartalk.com/t/damage-2/85221 "2014-05-30T03:46:23Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![spider-man](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/spider-man/32/2451_2.png) [@spider-man](https://community.cartalk.com/u/spider-man)\ **Post date:** [May 30, 2014, 3:46am UTC](https://community.cartalk.com/t/damage-2/85221/1 "2014-05-30T03:46:23Z")
my truck is a 1997 nissan pickup with. 254,000 miles.check engine light come on.only when i’am at highway speed.as long as i’am in city traffic, nothing i have a code scanner code(p.o.302) number 2 cylinder misfiring. i change spark plugs and wires .and dist cap.but check engine light came back on.i put in shop they claim that they can’t find nothing wrong.i guess i need to find a new mechanic. ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [May 30, 2014, 3:57am UTC](https://community.cartalk.com/t/damage-2/85221/2 "2014-05-30T03:57:41Z")
presume you changed the ignition rotor also. “misfire” means the crank isn’t measured as turning as fast as it should after the cylinder fires. It could be a spark problem, but it looks like you’ve done a lot to eliminate that as a possibility and the problem still remains. I guess it could be a problem in the spark generation electronics, but that seems unlikely. So what else? … well, it could be a fuel problem, like a faulty injector in number 2. Another idea is that there is really nothing wrong, but the ECM thinks the crank isn’t turning at the correct speed after number 2 fires b/c the component which measures the crank speed is faulty. That’s usually the crank position sensor, but sometimes – esp in early 90’s cars – there is a component inside the distributor that is involved. ---
**Author:** ![Caddyman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/caddyman/32/23_2.png) [@Caddyman](https://community.cartalk.com/u/Caddyman)\ **Post date:** [May 30, 2014, 6:57am UTC](https://community.cartalk.com/t/damage-2/85221/3 "2014-05-30T06:57:57Z")
How about a compression test? Has that been done? ---
**Author:** ![kmccune](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/kmccune/32/1237_2.png) [@kmccune](https://community.cartalk.com/u/kmccune)\ **Post date:** [May 30, 2014, 2:08pm UTC](https://community.cartalk.com/t/damage-2/85221/4 "2014-05-30T14:08:26Z")
Bad injector?-Kevin