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      05-01-2013, 09:39 AM   #1
Tommeh
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Car stutter

I have been noticing the last week or so that my car has been stuttering while maintaing a consistent speed or when in Cruz control. Its hard to describe the feeling but its like a much much much more less mild jerking motion you get when your car is about to stall out when you don't have a good rpm to clutch release ratio, only im crushing when it occurs. It feels like the car is pulsing but its so minimal I don't think a passenger would eve notice, but I do...


I remember awhile back I got new tires and discount told me one of my front Apex Arc-8's where warped. Im thinking that shit might be a cause as it might have worsened over time (I know I get slight vibration from that wheel) or possibly something with my clutch (But I watch RPM and they are consistent during this motion).

Any ideas
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      05-01-2013, 09:52 AM   #2
miro2296
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Could be a number of things. How many miles do you have on your car? Is it due for plugs, injectors, a Walnut blast? Most of these will solve that issue, unless it is the HPFP, but you might already have the latest version.
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      05-01-2013, 10:14 AM   #3
Tommeh
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Its at 82k I put new plug in at 60k. It had a HPFP replaces some 10's of thousands of miles ago. Never cleaned valves, or injectors.
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      05-01-2013, 10:27 AM   #4
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Quote:
Originally Posted by Tommeh View Post
Never cleaned valves
Most likely what it is. 82k miles and never a walnut blasting, thing is probably caked up
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Quote:
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looks like unicorn vomit.
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      05-01-2013, 01:00 PM   #5
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I experience this sometimes also while on the freeway maintaining a speed i have replaced plugs about 15k ago however have not had a blast to my knowledge so its probably time.. are there other ways of cleaning the valves other than blasting?
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      05-01-2013, 02:03 PM   #6
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Guess im looking for someone near Austin area who can do this around 300$ then >.>
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      05-01-2013, 02:23 PM   #7
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Sounds like carbon buildup. Costs around $800 to get blasted, IIRC. Call around to a few indy shops but $300 is probably not going to happen when an oil change on this car costs around $100.
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      05-03-2013, 04:20 PM   #8
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Walnut blast

I had the same problem - stuttering under load mostly in 3rd gear. No codes - so not plugs, injectors or HPFP. The dealer just did a walnut blast - seems to be running better. This was covered under warranty - but the dealer charges $400 otherwise.
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      05-03-2013, 04:52 PM   #9
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Quote:
Originally Posted by KingOfJericho View Post
Sounds like carbon buildup. Costs around $800 to get blasted, IIRC. Call around to a few indy shops but $300 is probably not going to happen when an oil change on this car costs around $100.
Place near me charges $400 without gaskets, $440 with gaskets. Not too bad of a deal. I think Helix charges like $375

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Originally Posted by Luther@Fleming Automotive View Post
Now taking appointments for intake valve cleanings. Process takes about 2 hours. Cost is 400.00 with out new intake gaskets 440.00 with new gaskets. Evenings and weekend appointments available. The cleaning is done by my BMW tech using the BMW blasting system with walnut shells. If you are interested please contact me asap for more information.

Luther Fleming
443.336.9521
luther.fleming@yahoo.com
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looks like unicorn vomit.
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      05-05-2013, 10:48 PM   #10
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Quote:
Originally Posted by nawt12
I had the same problem - stuttering under load mostly in 3rd gear. No codes - so not plugs, injectors or HPFP. The dealer just did a walnut blast - seems to be running better. This was covered under warranty - but the dealer charges $400 otherwise.
How did you get it to be covered under warranty? I was thinking about taking mine in for the same problem. 48k miles. New plugs 2 months ago. No tuner shops around here so the dealer really jacks up the prices. They know I can't go anywhere else.
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