Is this an o2 problem? I got the 227/233 cam put in and ran it with stock tune for about a week. It was running decent but not great. I had madwolf do the tune and all of the sudden the car started running terrible. It all starts at about 50 mph. I just gets a real bad studder/shake and you can hear it popping through the exhaust and when you give it more gas it just gets worse. On the last tank of gas I got 150 miles. It has gotten to the point where I DON'T even wanna drive it right now. Actually I can't afford to pay the 2.20 pg for 93 octane. I am getting slp headers put on within a week and I am going to have them put 2 new o2 sensors. Does it sound like I HAVE other probs? I scanned it with my auto x-ray and it said that a prior code was faulty o2 sensor but right now it has the ses light on and it says there are no codes found. I don't get that part because I cleared the codes and it spit another one.

oh and it is not the opti because it has 200 miles on it.
thanks
Brandon

 

My car acted the same way. Terrible gas mileage, sputtering, and a SES light. Changed both O2s with new AC replacements and it runs nice and smooth now

 

how much did the new 02's run ya?.....hard to install?

 

2.20 a gallon for 93 octane!!!!!!!!
We pay 2.60 a gallon for 91 octane here in the bay area, I would love to pay 2.20 a gallon.

 

O2's are $37 each from Jason Cromer. I had the same problem, cept I had new O2s installed. I guess the coating on my headers contaminated them, because when I replaced them, it's been running fine ever since.

 

yeah change O2s and clean the MAF wires (VERY GENTLY!!) w/ q-tip and some alcohol or better electrical cleaner

fuel filter?

also, you could have a burnt wire(s)

 

Dont wanna thread jack, but i paid $1.85 for 93 here in TX about a week ago .

Does it do it at WOT? If not then DEFINATELY your o2s. Your MAF may be dirty. You can go to O'Reilly and they might let you try out a MAF and see if it fixes the problem (they let me).

Doubt its a burned wire.

 

what is the part #'s for o2's for a 94. im gonna change both

 

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