Tech: Weird hesitation tonight????

[qwik01cobra]

I was driving home from the gym tonight and my car drove fine up until I hit 5th gear, then it started to hesitate. :thinking: It felt like something broke for a second but that was prolly from being at a low RPM in a high gear. It drove fine for a little while then when I stopped to drop my buddy off it was idling rough. Not obnoxiously but noticeably shaking a little bit. I pulled away and it felt the same it was hesitating/slightly bucking??? Then about a mile later it smoothed out. I've never had a o2 sensor go out on me but when Jerry from Sutton had my car on the dyno a while back he said that my driver side o2 was lazy and not reading well at all. But my check engine light never came on??? I brought it home put it in the garage it idled fine so I shut it off and checked the oil just to make sure, and it was just under "max". IDK... Anyone have a o2 go bad chime in.... thanks.

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[batman]

o2 maybe... is your car tuned? my car didnt have a tune and it would buck after a steady speed on the street but not the highway...put a toggle switch with a a/r gauge in and check them...

 

[Bigturbonotch]

mine did the same when i had longtubes on my car. It threw a slow 02 sensor code i think it was p0133. dont know if that helps at all.

 

[rdsnake]

Pull the plugs, I bet your problem lies there. Fresh oxygen sensors would help also, however I don't think that's your problem. A hand held scanner would do you wonders right now!

Kevin

 

[ChromeCobra]

Shes trying to tell you that she wants boost...:lmao:

 

[Boost12]

My car did the same thing back in the day when my 02s took a shit. Does the car run fine at WOT ? That should tell you if its the 02s right there cause they have 0 control when your wide open.

Try that...

 

[qwik01cobra]

Yeah I was going to try that Joe cause I know that is true about WOT but I wanted some other input before I got crazy cause we all know I've been through enough motors and I dont want to do it again. I just thought it was very weird cause it didnt throw a code or the CEL? Idk I drove it to work this morning and it drove perfect. I'm guessing it is that lazy o2. I am going to throw in one of my spares tonight or tomorrow.

The car has a base tune (no custom tuning). Rear o2's are off. And it has a EGR delete. Brand new plugs and brand new motor and it N/A so I doubt it could be the plugs with a mint A/F curve throughout. But if it happens again I'll pull them and check them if the o2 doesn't solve the problem. Thanks guys

 

[01GTvert]

don't rule out a marginal maff. It its dumping 2 much fuel once in awhile the motor will stumble. GL either way and let us know the fix