Well, I've been frantically trying to get ready for Sema so I've been installing the parts I have laying around. Well, today as I was driving home from washing the Evo, I got a CEL light. I've never had one, and somewhat concerned.

The car drives fun, but seems to have a hard time holding boost to 21psi. It seems to flutter from around 18-21 or so. I checked the piping and it all seems tight. I checked all the hoses for the BOV...it seems to run fine. I don't hear any knock or mis-firing.

I recently installed the following, but it was over a week ago:
Neisi piping kit
Neisi mini battery
ARC intake

And then I washed the engine bay, but "air'd" it off take note of the electrical areas.

I'm going to stop by Advance in the morning to get it scanned, but any ideas?

-Stephen

 

BTW, I have BRP8ES spark plugs. Should I go with the 7's instead? I'm still on a stock PP 05 turbo setup.

 

When did the cell came on ? idling ? cruising? under boost ? what rpms ?

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Under boost. I was shifting from 2-3rd at about 4k I believe.

 

Probably a boost code or a misfire code since those plugs are to cold for your set-up.

Where did you gap them at ?
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I havn't installed the BRP8's...still running the stock one with 6k on them.