After 2 trips to the dealership (including a firmware update) and being told that "they don't know why it's doing it", I went ahead and installed a new MAF sensor and 4 new spark plugs. Since this time, I've had a total of one day when the engine didn't surge, lag, sputter (whatever you want to call it). Last week, I decided to give another dealership a try. Took the service consultant for a ride and of course, this day, it didn't misbehave 1/3 of what it usually does. However, he said he could feel it and that it felt like more of a surge at low rpm, with a slight load on the engine. So I've got an appointment setup for this coming Friday, but to be honest, I think it's going to be a waste of time and I'm going to have to pay once again to have the car hooked up to a computer, only to be told that they don't know why it's doing it. I'm convinced that I'm either going to have to figure this out for myself and trade this car in on something else.
So this brings me to my most recent thought. I read a lot about the purge valve and some of the symptoms of misbehaving purge valves. Though it may be worth a look...so here's my question...I have an '06 2.4l, where in the hell is the purge valve located on this car. I've found a picture of it on gmpartsdirect.com, so I know what it looks like, I just need to find it on the car. As always, any input is appreciated. I really don't want to get rid of this car, but it's 3 years old, only 13,000 miles and it shouldn't be acting this way and it scares the piss out of me that these "gm certified technicians" can't find a thing wrong with it...so please, anybody, if you know where the purge valve is, please let me know...thanks in advance..
If 'service' can't find anything wrong, not even the 'compression' check on the exhaust, tell them to suspect/replace the CAT!!!!
Had mine replaced in August (35,000 miles), feels like a new car now. My guess is my power was diminishing over the past year until it was almost undriveable.
fred
__________________
Aggressive/ebony - Loaded (all but Onstar, polished)
Vin: 9289
RK Sport Magnaflow duals w/GXP rear fascia
$500 Deposit 1-27-06, Delivered 2-3-06
Objects in my rearview mirror, keep getting smaller and smaller, really quick!!
"Be Careful out there", Sgt. Phil Esterhaus, HSB
Constantly reminded about the cat and I have to agree, I think if it were replaced, this problem would just go away. Here's my problem, both dealerships that I've taken the car to keep saying that if it were the cat, the problem would be constant, all the time. Even though I disagree with them, they seem reluctant to want to just replace it. I guess that since they aren't going to be making any money off of it, they don't want to bother with it. I have the paper from GM explaining the issue with the cat in the 06's, but still, they're reluctant to replace it...
Do you have an aftermarket exhaust or anything that would amplify the mis? Since it does happen on every day could it be moisture related? Does it happen more frequently on rainy days?
Find someone with HPTuners or Autotap to look at misfires. You could also take it to Autozone and they might be able to look at misfires.
Do you have an aftermarket exhaust or anything that would amplify the mis? Since it does happen on every day could it be moisture related? Does it happen more frequently on rainy days?
Find someone with HPTuners or Autotap to look at misfires. You could also take it to Autozone and they might be able to look at misfires.
Norm
No aftermarket anything...And no misfires...when it's doing it, it does feel like a misfire, but every time it's been diagnosed, it's not showing any misfires. Now that the weather has been cooler, it still does it every day, but it isn't as noticeable, but it's still happening...I'm just trying to build up the nerve to take it to the dealership and tell them that I demand that the cat be replaced. Either that or drive into a brick wall...lol
No aftermarket anything...And no misfires...when it's doing it, it does feel like a misfire, but every time it's been diagnosed, it's not showing any misfires. Now that the weather has been cooler, it still does it every day, but it isn't as noticeable, but it's still happening...I'm just trying to build up the nerve to take it to the dealership and tell them that I demand that the cat be replaced. Either that or drive into a brick wall...lol
I cat issue would be constant. More noticeable at higher loads.
Ask them to have a tech ride with you and scan it while it's happening. Try to notice before you go in exactly the conditions it is at it's worst and then do the exact same thing with the tech scanning the engine.
By the way EVERYONE hates a driveablitiy issue ticket. They tend to take longer to figure out than the book calls for.
Your looking for a code to be set which would probably mean emissions related. HPTuners and Autotap can monitor mis fires on all cylinders as all engines have mis fires and the pcm will record them in total count and current events.
The tech in previous thread said surge and you say sputter...were chasing our tails here.
Give us history on the car. New/used, manual/auto, maintenance history...
Is this intermittent and random or can you count the time between events. Does it do it when the car is stopped or only time you can feel it is high torque low load in lower gears?
Is there a filter in the air box?
THX,
Norm
P.S. I've got an intermittent mis fire that I have not data logged yet but since I have a turbo seal bad and leaking oil into intake and onto MAF mine might be MAF related.
WHY IS IT THAT THIS FORUM KNOWS MUCH MORE ABOUT THIS CARS THEN THE "CERTIFIED" MECHANICS AT GM DEALERSHIPS ?????????? Not knowing anything about the car your selling, isnt very confidence inspiring.
Your looking for a code to be set which would probably mean emissions related. HPTuners and Autotap can monitor mis fires on all cylinders as all engines have mis fires and the pcm will record them in total count and current events.
The tech in previous thread said surge and you say sputter...were chasing our tails here.
Give us history on the car. New/used, manual/auto, maintenance history...
Is this intermittent and random or can you count the time between events. Does it do it when the car is stopped or only time you can feel it is high torque low load in lower gears?
Is there a filter in the air box?
THX,
Norm
P.S. I've got an intermittent mis fire that I have not data logged yet but since I have a turbo seal bad and leaking oil into intake and onto MAF mine might be MAF related.
I am the second owner of the car. I know the first owner. Regular oil changes, etc. Car just turned over 15,000 miles, it's a manual trans...What it's doing is not easy to explain, but I'll do my best to try again...Car starts and idles fine...When starting off in 1st gear, you can feel the car sputter, like it's not getting gas, or it's misfiring. Once you get going so fast in first gear, you don't feel it. Shift to 2nd gear, same thing. Until you get to a higher rpm, you can feel the sputter...same in third, fourth and fifth. Yes, it does it all of time, but some times it's more noticeable than others. I did have a tech ride with me a few weeks ago, of course it was one of those days when it was less noticeable. He did feel it, he described it as a surge. He said he would research it and get back with me...have yet to hear anything from him. Yesterday while driving it to work, it was hardly noticeable, today, it was much worse....who knows about tomorrow..
I am the second owner of the car. I know the first owner. Regular oil changes, etc. Car just turned over 15,000 miles, it's a manual trans...What it's doing is not easy to explain, but I'll do my best to try again...Car starts and idles fine...When starting off in 1st gear, you can feel the car sputter, like it's not getting gas, or it's misfiring. Once you get going so fast in first gear, you don't feel it. Shift to 2nd gear, same thing. Until you get to a higher rpm, you can feel the sputter...same in third, fourth and fifth. Yes, it does it all of time, but some times it's more noticeable than others. I did have a tech ride with me a few weeks ago, of course it was one of those days when it was less noticeable. He did feel it, he described it as a surge. He said he would research it and get back with me...have yet to hear anything from him. Yesterday while driving it to work, it was hardly noticeable, today, it was much worse....who knows about tomorrow..
What was different about the two days? Temp or humidity different?
Did the tech scan the car while he was riding along or just looking out window? His face should have been buried in a Tech II.
I am the second owner of the car. I know the first owner. Regular oil changes, etc. Car just turned over 15,000 miles, it's a manual trans...What it's doing is not easy to explain, but I'll do my best to try again...Car starts and idles fine...When starting off in 1st gear, you can feel the car sputter, like it's not getting gas, or it's misfiring. Once you get going so fast in first gear, you don't feel it. Shift to 2nd gear, same thing. Until you get to a higher rpm, you can feel the sputter...same in third, fourth and fifth. Yes, it does it all of time, but some times it's more noticeable than others. I did have a tech ride with me a few weeks ago, of course it was one of those days when it was less noticeable. He did feel it, he described it as a surge. He said he would research it and get back with me...have yet to hear anything from him. Yesterday while driving it to work, it was hardly noticeable, today, it was much worse....who knows about tomorrow..
Could you release clutch slightly in 1st gear with the brakes applied and feel it? You'd be slipping the clutch with your right foot on the brake pedal holding the car.
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