Studdering and feels like missing after header install!
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Teching In
Joined: Jun 2007
Posts: 24
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Studdering and feels like missing after header install! Last month my dad and I installed some pacesetter headers with an off road y pipe, we used 02 extensions for the front and didnt mess with the rears, we also replaced the plugs and wires, and i removed the a.i.r and e.g.r. IT ran great for three weeks and then all of a sudden monday when i started it up it had a rough idle and then when i went in reverse the the rpms got even rougher. then i went to accelerate and nothing happened just like it was missing and couldnt quite get going, but then after about three to five minutes of driving it runs fine again. it really makes no sense and when i ran it on the computer, no misfires showed up only the rear o2s and the e.g.r.. Could the removal of the air and egr and the rear o2s be screwing my computer up. It starts this acceleration hesitation and rough idle every time i start the car up until it gets warmed up. ive been meaning to get everything tuned, just havent saved the cash yet. thanks for any help.
wat kind of plugs did you replace tghem with? if you did it with BOSH i highly suggest you get rid of those and i garuntee it will fix the problem. i had the same problem with mine. and dont get standards! get platinums of higher. i suggest using ngks,iretiums, ac delco, really anything except BOSH, and get platinums. also make sure you gapped the spark plug correctly.
make sure all the wires are snug and that there isnt a crack in any of the plugs. there shouldnt be anything wrong with your computer. i drove my car for almost 5 months before i got my hptuners and i did the exact same thing as you.
My guess is that you need new O2 sensors. You will start to feel the problem before a code is thrown. New headers ate up my 70k mile stockers in about a month and that is exactly how my car acted.
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when you removed the air pump there was a bolt on the back side of the drivers head. make sure this bolt is tight, there is a ground there that grounds the computer and 1,3,5,7 coils, and the crank sensor. my car started running like **** and then eventually started dying going down the road and then wouldnt even start at all. hope this helps
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