ok here is my situation. for some reason i keep on breaking up mostly at full throttle i had been throwing codes and got misfires in all 4 cylinders. we have tried ever little thing possible exept for a new tune. i have changed my plugs 4 times in 2 months to see if the was the problem no go we tried my friends coil packs on my car no go, leak down test no go. we have no idea what is going on and this all occurred after i had changed my plugs. i have an 03 wrx with utec, stock modified injectors, custom 20g turbo turbo xs intake, and was tuned at turbo xs. please someone help me out im dieing here

 

have you had the injectors tested?

 

everything was perfectly fine until i got my plugs changed but i havent had them tested bought them off a friend

 

put real injectors in and take it back to turbo XS

 

what kind of plugs are you using? it could also be the modified stock injectors... since they're a bit harder to control from what I've heard...

 

but it was all the sudden after i changed my plugs there was no signs of any problems i am using ngk copper bkr7e's gapped to .029

 

Did put brand new plugs in the same time you put the mod'd injectors in?

If that's not the case, and you put new plugs in some time afterwards, being when problem started, I'd bet its a combination of new plugs and the injectors... meaning its the injectors.

Honestly, I'm guessing here about those specifics. But the only problems I can see, and other experience folks on this thread can see, is always related to the injectors. Bit the bullet and get them checked. If they're OK, at least you'll have that peace of mind and can look elsewhere for the problem.

jason