jerrydkissinger

did tune up to fix miss. took care of most of it but still has small miss only in #3 cyl. switched plug from diff. cyl and still miss on #3. new wires plugs cap rotor . has any one had this problem . coil or igniter ??

1991_crxsi

iTrader: (1)

Are you sure it is an ignition issue? The reason why I ask is that those engines need incremental valve adjustments. Furthermore, they commonly burn exhaust valves. Either scenario will lead to the car running like it has an ignition miss.

jerrydkissinger

SpokaneSpeed

What all did u replace for the "tune-up"? Also, what spark plug gap did u go with and have you inspected the plugs to ensure they have proper gap. Did u replace wires? If not, u need to test them to see how high the resistance is...

jerrydkissinger

I am a car guy. plug's ngk wire's cap rotor. all of it oem . I check the gap on all the plug's I put in. lot easer and less work . it does not sound like a valve. I am checking the valves in the morning so I will look. the spark looked weak on that cyl than on the rest

OneBadTurboCRV

So you used a spark gauge to check the weak spark? The coil and igniter have no way of knowing when to stop firing at a specific cylinder. Use your bore scope and inspect the valves. Do a compression and leak-down test to verify engine health. Most that have this specific problem with parts changed correctly ends up being burnt valves. Good luck.

jerrydkissinger

No I didn't have allmy tools with me. I could see that it was weaker just by putting a different plug in that plug wire. Goes from hot blue spark to dull orange. Like you would see on a old 70' v8 Delco or autolite. Put it back in the other cyl. It's back to blue.