Missfire at higher rpms

[krummel45]

I am having missfire problmes starting at 5000 rpms and higher. When i got it tunded i had no problmes but now seem to be having them. What do i need to do to fix the problem?

thanks

 

[BigDaddy186]

Try gapping out the plugs. I had the same issue. NGK calls for .032

 

[King Salami]

How old are your plug wires? If you've got over 50,000 miles on 'em, I'd consider them a prime suspect.
Look at your plugs - do they all look the same (slightly light grey)? A dark plug may indicate a bad plug wire, coil pack, or clogged injector.

 

[Defiant]

Make that .028" for turbo plug gaps. Replace both the plugs and the wires. Use anyone's "premium" plug wires. Stay with NGK plugs.

 

[BigDaddy186]

I couldnt remember what it was so I hit this up http://ngk.com/results_app.asp?AAIA=1316593 Stick with .028". now that you bring it up I think that was what I used