new plugs....now a problem

[dwnshft99]

Just installed som new NGK Iridium IX's. Now my car is bucking at high RPMs and also around 11-12psi. I am getting spikes up around 15-16 psi. Everything was just working fine yesterday. I do not know what else to add because I don't know where to start so feel free to ask questions. ohh I did try turning the boost down a little but it did not help.

 

[GVTalon]

Did you gap them properly? .028

 

[dwnshft99]

Pre-gapped

 

[heavyD]

You aren't supposed to gap the Irridium plugs because the electodes are too delicate. I have been using the NGK Irridium IX's for 3 months and they are working great for me. I could notice the idle was smoother and I am getting a few more mpg. Check your plug wire connections.

 

[dwnshft99]

Now that you mentioned that. the plug wires did not seem very snug when i attached them. NGK wires w/ NGK plugs........ you would think there would be no problems.

 

[GVTalon]

Originally posted by dwnshft99
NGK Iridium IX's

Oops didn't read the name of the plug, just skimmed.