<p>&lt;p&gt;I was taking off my turbo xs intake today and putting on a hks filter...after reinstalling intake I checked the a/f at idle. Everything was good. Then I decided to go check a/f at wot. My car started backfiring and the service engine soon light began to flash....so I took the airfilter off and the mad adapter and reinstalled my original filter and mad adapter. Took it back out and did a pull same issue. I dont know what it is..ive checked for boost leaks..none from what I removed...ive never seen a single spark plug go bad from removing an intake so I dont what it could be....any insight would be helpful.&lt;/p&gt;</p>

 

id go over the couplers and retighten them. It sounds like a boost leak

 

^Second that. Check the MAF for damage/dirty and the prongs for the plug harness if you took it off. Did you happen to check what the code was for the check engine?

 

<p>Gonna tear everything back apart. Get some mad cleaner and see what the deal is. This is exactly why I wanna go speed density so I dont have to deal with the maf.no I didn't check the code it only flashed im pretty sure it's for misfire.

 

I agree check the maf even check if you pluged it back in all the way lol I've done it

 

The code was p0234 basically out of nowhere I was hitting boost cut but no worries now the head basket blew and im fixing that and creeping it to my tuner. If you would like to know what happened I wrote a thread on my wonderful day today.