[btjetman]

Going into the dealer tomorrow. The cycling of the recirc valve has gotten so bad that the car feels like it is stumbling between 4000 and 5500 rpm. In fact, one time today it just hung at 5000 rpm for about 5 seconds. The cycling is so bad that it will literally rock you in the seat.

By stumbling I mean; pulling hard, nothing, pulling hard, nothing, and by nothing I mean almost as if you had shut the engine off.

I'll report what we find tomorrow.

 

[importmonkey]

that sounds horrible, man. good luck!

 

[Cinderblock7881]

is that recirc? or a bad wastegate actuator?

 

[btjetman]

it's the recirc, you can hear it purging into the intake as woosh each time it cycles. (woosh or PPPSSHHHH) lol

 

[[email protected]]

sounds like wastegate issue

 

[btjetman]

sounds like wastegate issue

I'll have both checked. :wink:

 

[Cinderblock7881]

yeah, I mean it could be either one with what it is doing. the BPV could have gone out, so it will barely hold boost then let go, hold again, let go. is it fine during normal driving or low boost?

 

[btjetman]

Yes it is fine under normal driving.

 

[Cinderblock7881]

well that is good atleast. but def makes it one of those two. how many miles you got man?

 

[mwil028]

Im wondering if you have an intake? And if they will be typically dealer A$$holes and blame your problems on the intake and call voided warranty?

 

[btjetman]

Yes I have an intake and they have seen it before, they are not A$$hats. Small dealership and very helpful service department.

12500 +-

 

[MyDianaZ06]

Yes I have an intake and they have seen it before, they are not A$$hats. Small dealership and very helpful service department.

12500 +-

can't wait to hear what they say. I hope when you take it you can recreate the symptom. do you have an appointment?

 

[btjetman]

Yes, tomorrow at 1:00pm

 

[MyDianaZ06]

keep us posted

 

[Cinderblock7881]

interested to hear the culprit lol

 

[MyDianaZ06]

Oh I am sure he already went. just hasn't had time to post up. I am sure he will give us details about his visit.

 

[btjetman]

I make too much boost!!! Now let me explain: We checked the BOV and it was good. The only time we could get it to act up was in a heat soak condition. We ran the car for a good 15 minutes then parked to let it heat soak for about 5. Bingo, fluttering BOV. Now, let me say that I've known this mechanic at the dealer for 15 years, and he is very well trained and very good. The first thing he asked was, "Are you sure you don't have a tune?" and of course I don't. So now we go into theorizing mode. We know the BOV is working correctly, so it must be opening to relieve boost, Why? (Theory) when the IC heat soaks the spring in the cheap factory BOV weakens and allows the valve to open. Now, why doesn't this happen on others? (Theory) with the Injen intake and the Magnaflow exhaust the engine is able to flow more air in and out and makes more boost. enough boost that the weak spring can not hold it closed. (note 1) Luckily I have ordered a FMIC from one of the forum members so I think the problem will be solved when I install it.

On a side note: I asked, "Is it a BOV or Recirculating Valve?" He said, " It is a BOV that recirculates verses one that vents to the atmosphere."

And, just to stir the pot on another thread, I asked about 93 octane versus 87 octane. He said that the ECU will allow the timimg to advance with the 93 octane and you should see 10 to 12 hp increase.

(note 1) this is just a theory and of course yours is welcome and appreciated.

 

[MyDianaZ06]

I make too much boost!!! Now let me explain: We checked the BOV and it was good. The only time we could get it to act up was in a heat soak condition. We ran the car for a good 15 minutes then parked to let it heat soak for about 5. Bingo, fluttering BOV. Now, let me say that I've known this mechanic at the dealer for 15 years, and he is very well trained and very good. The first thing he asked was, "Are you sure you don't have a tune?" and of course I don't. So now we go into theorizing mode. We know the BOV is working correctly, so it must be opening to relieve boost, Why? (Theory) when the IC heat soaks the spring in the cheap factory BOV weakens and allows the valve to open. Now, why doesn't this happen on others? (Theory) with the Injen intake and the Magnaflow exhaust the engine is able to flow more air in and out and makes more boost. enough boost that the weak spring can not hold it closed. (note 1) Luckily I have ordered a FMIC from one of the forum members so I think the problem will be solved when I install it.

On a side note: I asked, "Is it a BOV or Recirculating Valve?" He said, " It is a BOV that recirculates verses one that vents to the atmosphere."

And, just to stir the pot on another thread, I asked about 93 octane versus 87 octane. He said that the ECU will allow the timimg to advance with the 93 octane and you should see 10 to 12 hp increase.

(note 1) this is just a theory and of course yours is welcome and appreciated.

AWESOME!!! (I love troubleshooting)

Ok, so the blame is the small intercooler getting hot and making the weak stock BOV just giving out at that moment. I was thinking in my head someones aftermarket intercooler would answer that question seeing as, for example, turbosocks intercooler deleted that heat soak. But then I read on that you are getting one from someone (I wonder who ). so after that install, it shouldn't flutter.

BTW Awesome info about the 93 octane and gaining 10 to 12 hp. I wonder if that 10 to 12 matters if it has ethonal or not. like if it has ethonal will it be a lower increase hp.

Great info Btjetman.

 

[VeeTee]

And, just to stir the pot on another thread, I asked about 93 octane versus 87 octane. He said that the ECU will allow the timimg to advance with the 93 octane and you should see 10 to 12 hp increase.

Whaaaat????? :crazy:

 

[VeeTee]

And, just to stir the pot on another thread, I asked about 93 octane versus 87 octane. He said that the ECU will allow the timimg to advance with the 93 octane and you should see 10 to 12 hp increase.

Say Whaaaat????? :crazy: