HeYy whats goin onn. i have a 05 Eclipse GT.. I recently got headers and piping all the way through; no cat, no resonator. and since then my car is getting slower at higher RPMs, after i get to 80mph iam not going ne where. and on top of that iam putting in bout $40 of gas in my car every day cuz it just eats it up fast.. i think i have a problem!!

Turns out i might be running very rich, i went and asked around and so far ive been told that i need to get a fuel pressure regulator and a MAF Sensor.. and the MAF Sensor has to come off a 3000GT!! i am not a 100% of that would even fit the eclipse.. Ne Help would be great.. Please Help!!

 

Do you have any other mods? or just the straight exhaust, and what size is the exhaust, like what diameter? And if you were running really rich you'd notice. my eclipse ran rich and if someone drove behind me, there eyes would start hurting and tearing up,lol. and whats your gas mileage like, before and after

 

Are your o2 sensors on? Do you have a check engine light? Did you reset the ECU after the install? (remove the battery for 30 seconds)