hey guys whats up ? allright well i got a 03 lancer es. with exhaust and intake. well everytime my rpms go above 4000 i get a sputter... it will go from 0 to 4 nicely.. then after it will kinda sputter then go back to normal till redline.. and my service engline light just came on.. today while i was driving it happened the worst and thats when it came on. it sputtered about 4 times..

 

Do you have a header? If you have a header and no CEL (Check Engine Light) eliminator, it will cause your check engine light to go on. You can get a CEL eliminator from RRM (www.roadracemotorsports.com) for about $20. Basically, if you have a header on there it means the pre-catalytic converter that was on your original exhaust manifold has been removed so your O2 sensor is causing the CEL to come on. Get the CEL eliminator and it should fix your check engine light problem.

As for the sputtering, the only thing I can think of is if the piping on your cat-back is bigger than 2.25, a lot of people have said you lose a lot of back pressure and maybe that's causing the sputter? Don't know for sure, but maybe something to look into. Hope this helps, good luck.

 

no i dont not have a header. but i think the second part of that reply might help. i have 2.5 inch piping with a 4.5 in tip..

 

With the CEL, take it to autozone or something like that and let them hook up and read your fault code. After you know the fault code, come back to this website and search the forums for that code. More than likely someone else has had the same problem and will hopefully be able to give a better explanation.

 

thanks bro

 

try a new set of plugs i had a simlar problem and plugs will throw a code. i also had this problem because of a bad coil, but i would try the plugs first.

 

No problem. Good luck.