2006 Audi A4 B7 major hesitation when accelerating from a stop

[Markie93]

Hey guys,
was wondering if any one else has had the same issue. I drive a 2006 Audi A4 2.0T Quattro qith about 137,000 miles, All stock. This is my first Audi, fist car with a Turbo. So I dont know if this is turbo lag or transmission related.

When I am at a complete stop, 3 out of 5 times, when I go to accelerate, I notice a 1-2 second delay before the car starts accelerating (about 2,000 RPM). If I am pulling out in traffic I almost have to take this into account if there is someone coming. sometimes i don't notice it, and othertimes i really notice it. and when it kicks in it almost jerks me to the back of the seat. For a car like this I wouldn't think that the turbo lag would be this inconvinient on a $40,000 car. Any one else had this issue? Is this normal? Any ideas or troubleshooting tests?

Thanks!!

[snoproladd]

You may want to have your transmission checked...specifically the torque converter. Do you notice any RPM surging at low RPM?

[Markie93]

What do you mean by RPM Surging? It seems to do it only if I come to a complete stop. If I am at a stop and floor it 3/5 times it will start very slow, then when it hits 2,000 rpm, it jolts forward...

[Markie93]

It seems to be perfectly fine out of first and second gear. Runs perfectly fine as long as I dont stop, on the highway and such runs great. The only time i notice it is when I start going from a stop. Thanks for your responce!

[Markie93]

bump

[Markie93]

What do you mean by RPM Surging? It seems to do it only if I come to a complete stop. If I am at a stop and floor it 3/5 times it will start very slow, then when it hits 2,000 rpm, it jolts forward...

[Pat_McGroin]

I would check on edmunds to see if there are any recalls or TSB's for your car. There lots of people complaining about the same thing here and on VWvortex, most have found that there is an update to the DSG software and some for the ECM through TSB's if you do a little searching. I hope you have extended warranty if there are any updates to your cars software otherwise you'll be looking to pay $200-$350 at the dealership for an update.

Here's the edmunds link>> http://www.edmunds.com/car-maintenance/guide-page.html

My car has done this since day one and I too always thought it was turbo lag, during my first service(5k) I asked the SA and was told it was normal. Come to find out from other A3 owners that their cars received an update at the dealership. I take my car to an indie shop for all my services so I had no idea. I put it off for so long, I'm currently at 49,880k miles but now I have a list of things that need attention to which should be covered under warranty.

[MechanicalDream]

Has anyone figured out the cause to this issue? I just started experiencing the same symptoms. I replaced my cam follower, coil packs, and spark plugs and it still has a hard hesitation. If I lightly accelerate it is much less likely to stumble, but when I accelerate hard, then like the OP said, I almost get ripped out of my seat!! I have an extra engine sitting in the garage, but I'm waiting to put it in until I can figure out why my current engine is having hesitation issues. ANY information or ideas would be greatly appreciated.

[Markie93]

Still nothing on this... I haven't really followed up with anything and just kinda left it. I drive in sport mode which seems to help or some reason. BTW mine is a 2006 B7, not an 05'

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[Markie93]

Bump

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[Markie93]

I may have found a solution. I'm replacing the PCV valve here soon (ordered the new one tonight off (europaparts.com) Got the PCV and the gasket for like $65. I heard this may be a cause... Will update if it fixes the problem.

[Kid Red]

I'm getting something kind of similar, though my issue doesn't sound as dramatic. From low RPMs only, around 1800-2000 and very light acceleration the car will stumble. It's not jerky, and not off/on type acceleration, but there is a sputter/stumble. As OP, once past 2000 RMPs, car runs smoothly. Idle is also fine. Not sure where to start so I'm following this thread.

[Japanee]

I too have the same problem with 2006 a4. Im wondering what is the best approach to this problem.

[Markie93]

I may have sounded a little more dramatic when I talked about mine. When accelerating from a stop, mine isn't jerky. It's kinda like how yours sounds Kid Red. Over 3,000 views and no solution. Surely someone out there must have had this and gotten it fixed.

Any help is greatly appreciated.

Jake

[Kid Red]

Well the wife took it in to be looked at. Audi had the car for 4 days and were stumped early on. They came back yesterday and said they think it's the 1-2 gear forward clutches. $2600 to fix.

My indy guy doesn't agree with that assessment because no codes were triggered and they won't really know what the issue us without popping open the transmission.

So I'm going to let my indy look at it and see what he can find. Otherwise, we'll drive it for as long as we can and then trade it in.

So sad.

[Ja6avant]

Just had the fluid changed in the trans, tiptronic, in our 06 a4 quattro avant. It had a hesitation from 1st to 2nd a and would shudder when it shifted from 6th to 5th on it's own. Also did the adaption as suggested by dealer. Car has 87,000 miles on it. Seems to have fixed the problem.

[half_duplex]

I'm getting something kind of similar, though my issue doesn't sound as dramatic. From low RPMs only, around 1800-2000 and very light acceleration the car will stumble. It's not jerky, and not off/on type acceleration, but there is a sputter/stumble. As OP, once past 2000 RMPs, car runs smoothly. Idle is also fine. Not sure where to start so I'm following this thread.

I am getting this exact issue. between 20-50 mpk and 1800-2000 RPM, light acceleration makes it sputter. Mine has gotten worse and I can almost trigger it now. Mine also delay jerks on acceleration. I'm going to change the spark plugs and check the coils and we'll see if that fixes it.

[Joelluv12]

I am getting this exact issue. between 20-50 mpk and 1800-2000 RPM, light acceleration makes it sputter. Mine has gotten worse and I can almost trigger it now. Mine also delay jerks on acceleration. I'm going to change the spark plugs and check the coils and we'll see if that fixes it.

hey any luck with changing the plugs?

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[Markie93]

I changed the coil and plugs. Made no difference for me

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[Vittorio]

Having the same issue. Plugs and coil packs have been changed without fixing it. How I intend to get to the bottom of this.

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[MechanicalDream]

Now, I'm still not sure if I'm experiencing the same issues as some of you others, since it's starting to sound like some of you think it is transmission related.

I have a 6 speed manual so I don't think a transmission shudder or clunk is my issue. I do believe that my issue lies within the motor itself.

I have not experienced the hesitation for at least 5k miles. Here's what I did... First I ditched the PCV system and got a valve cover and catch can setup, this did not end up helping. Next, I threw in new coils and plugs (I don't think coils were necessary, but I wanted the red ones, so I bought 'em anyways), this seemed to help, but was still having issues.

Before my next oil change I ran an entire can of BG 109 through the engine for about 30 min before I changed the oil. Ever since I did this, I have yet to have an issue with hesitation. I will update this post if at some point I find out otherwise, until then, I'm gonna keep on driving with my fingers crossed.

And just remember, a worn cam follower can cause weird things to happen, I'm on my fourth cam follower in 142k miles.

Good luck guys.

[Markie93]

Hmm... What is BG 109??

[apachedaddy]

There is a message out, i'll try and find it. But it states to have filter and fluids changed. If this does not fix the issue it is a bad TC...

Update: from what i can tell there is a trans fluid update"something called blue fluid" and reprogram the trans is the fix for this....

[Markie93]

interesting... btw, when changing the PCV, this also did not fix anything for me.