02v8ta

iTrader: (8)

My car on acceleration starting missing/ Hesitating and flashing the check engine light. Went away after I laid off the throttle. Car has been sputtering / missing at idle and acceleration until about half throttle. It's always thrown codes for my 02 sensors because of an exhaust leak. Hopefully it's just the slip
Fit with the hookers I can fix ad replace my fouled up sensors. Now would this be causing my problems ? Also this started during the week it's rained everyday. I really don't want it to be my newly replaced opti. I did a quick check for burnt wires but didn't see any. Hopefully I make it home and can do a better search for that there. Thoughts and mainly about my
Idea for the 02 being the cause. Btw on my phone don't hate on the grammar.

WS Sick

If it started with the rain I'll bet the new codes are either high or low res on the opti, The problems probably disapear with dry weather. Check the codes and go from there. The coil wire could also be affected by wet weather were it bad.

jaycenk

iTrader: (1)

Yes an exhaust leak can cause a false lean and foul the spark plugs and O2 sensors. Had this problem with a leaking header 2 years ago. fixed the leak and the shitty tune, problem solved. If it has been leaking for a while this could be your problem. It usually takes some time to foul them out. say a couple weeks of DD driving or a month or 2 of weekend only driving.

WS Sick

Was your leak before or after the O2 sensor?

jaycenk

iTrader: (1)

Before the first time and then the second time after but it was in a long tube. The one before the O2 was and bad weld up on the primaried at the collector and the O2 was 6inches down from that. the second was at the slip fit due to the welder dropping it and flatening one side of the slip on the collector. O2 is about 5 or 6 inches infront of that. The 3rd time the weld he made failed and it leaked in front of the O2 again.

bandit1transam01

Sounds like you have an MAF sensor problem with it being too dirty or bad. Unplug the MAF sensor and see if all the misfire type stuff and the sputtering noises stop. I had the same problem just a couple weeks ago with the misfire sounds on acceleration or reving, then when I let off the throttle after accelerating it would make a sputtery/ gurgling sound.

02v8ta

iTrader: (8)

Going to fix my exhaust leak, hopefully it's just the slip fit on the first primary. Replace the fouled 02s and do a good maf cleaning. Hopefully it's that simple. Thanks everyone.

97lt1camaro

iTrader: (3)

Flashing check engine light is random/multiple misfires. Id be looking towards the opti.

02v8ta

iTrader: (8)

Just did the opti ughhhhh and it did go away. Could the rain be effing anything else up.

02v8ta

iTrader: (8)

Only had a minute to play with it in the parking lot but it SEEMED to run better with the maf unplugged. Now it seems Everytime I take a sharp turn regardless of speed the ses light flashes tonight is a good maf cleaning and inspection of the wires + code pulling. And from there I will be happy or just end my bad day on a horrible note.

jaycenk

iTrader: (1)

I belive Unplugging the MAF takes it out of closed loop and puts it in open loop so it wont be using the O2's either for fuel trim. But if the plugs are fouled enough it may still missfire even though the A/F mix is better then it is in closed loop due to the fauls lean if thats what it is. I think thats the way it works. Thats the way someone explained it to me but it may not be 100% acurate as I am a visual learner and to an audible learner. Maybe someone else can review that statement and tell if its true or not.

02v8ta

iTrader: (8)

I am getting codes for both 02s I know that so the leak code be the header bolts losing correct ? Please tell me re tightening is that fix.

97lt1camaro

iTrader: (3)

Are you using delco o2 sensors?

02v8ta

iTrader: (8)

1st time yes, this time no, ac Delcos should be here tomorrow.

97lt1camaro

iTrader: (3)

With my long tubes, i can't run anything other then a delco o2 sensor. Throws codes instantly until i put delco's in. Reset the computer when you put the new sensors in and see what happens.

02v8ta

iTrader: (8)

So got the codes, really happy actually. No ignition codes

P0100 MAF sensor something....

P1441 evap system flow during non- purge

and my P0300 random misfire that happens randomly.

Car does get worse after operating temp it seems. I have the intake apart now, cleaned the maf, going to leave it apart and hope my new 02s and air filter come tomorrow.

02v8ta

iTrader: (8)

Did the maf cleaning. Waiting on the 02s still but it still is misfiring and worse now it seems. Ses light will flash more now :/ could this be a maf/ 02 sensor problem or would it not cause it to misfire ? I know my
02s are fouled.

This is what my trams am did when the intake gasket blew

02v8ta

iTrader: (8)

Still throwing misfire code obviously and p1441.
The opti would be throwing some kind of code to lean me in that direction if it was that, right ? What do I do it's about to go the dealer can't be without it to long.

ZFreie

OP, are you 100% sure nothing is leaking ANYWHERE. I had a intake oil leak dripping on an o2 wire and running down to the sensor its self and would cause it to act up randomly, no rhyme or reason.

I'm just throwing ideas out there, I know how aggravating it can be chasing a problem that's not apparent, and once worked up how easy it is to miss something simple.

Hope you get the car sorted, you've had bad luck with that thing. I've been following your threads lol

02v8ta

iTrader: (8)

Thanks zfreie. Oh it leaks lol but I haven't been under my car yet to see if any got on the wires or 02 connectors. That would be a simple problem I over looked. And now after the car is warmed up the Ses light stopped flashing but idles rough now and under acceleration.