ok so i just spent all evening putting in a new 02 sensor in my G/F's 1998 3.8L camaro because thats what the code read the bank 2 sensor was bad if you remember the previous thread. so i replaced it(PITA by the way), so we take it out for a drive and its doing the same thing it was before, when you accelerate even moderatly it hesitates and runs horrible, and the check engine light came back on. any clue at all what it is??? even just an idea???? can i but just a cheap code reader somewhere? thanks

-tyler

 

Does it run like this when first started, while the engine is still cold?

 

yes, doesnt matter if the engine is cold or hot. and it runs fine at idel, its only with maderate acceleration that it does it

 

Have you checked your fuel pressure? Perhaps the filter is dirty thus starving the engine under load? I would check the little things first, like are you sure the spark plugs are good the coils the ICM and all that jazz.

I have heard that a plugged cat could cause it to run like that though also, its a pretty general problem with a laundry list and a half of potential causes.

 

ya i know thats what suck. when we got the code read the first time it was the bank 2 heatedsensor was bad, thats what i just replaces. not the check engine light came back on as soon as we started driving and it ran like crap

 

could it maybe be the MAF or something?

 

One way to find out if it's the MAF. Unplug it, and drive around. If it runs fine then you found your problem.

 

My previous car (95 monte Z34) had a plugged cat and did the same.After driving it for awhile look under the car and if its glowing orange theres your problem.Not saying thats it but its worth looking into.Hope that helps,but if not ive been wrong before and ill be wrong again.

 

My first thought was the CAT. How about the fuel filter? Fuel pressure was a good place to look like mentioned.