Oregon

hello there, I have a 95 del sol SI with a D16Z6 with 150k mile's,

Recently I put on full catback exhaust,aem Intake and a Megan 4-2-1 header with 2 o2 bulks, my old o2 senser was crap, so i borrowed a 4 wire o2 senser from a buddy, and i installed it into the primary bulk in the front of the motor, and capsed off the 2nd bulk near the cat,


My Question is... car ran fine with stock header and bad senser, so i replaced the header with a aftermarket one, and installed another 4 wire from a 96 gsr, and the car ran ok !!

sometimes in 2nd gear at 3,000 rpms, it would get sluggish with no power, then in 5th gear at 3,000 rpms, it would do the same ****, and I would press the gas down and it would want to die, or get really sluggish... ??

So now i have the aftermarket header still on there, and capped off the Primary o2 senser bunk, and running No o2 senser... Car runs Great, and even seems abit faster during power band...

Does anyone Know why this is ? I noticed My gas milage sucks bad with no O2 senser, But the car runs way better..


Any help would be great

I have another question, i dont want to make another thread, so ill just ask,

Do they make replacement kits, to replace the cv boots on steering racks ? I nocticed mine have had better days.. I would like to adress that very soon, any help would be great,

Oregon

I take it No body Knows ?