GS - 3rd Gen (2006-2011) Discussion about the 2006+ model GS300, GS350, GS430, GS450H and GS460

Symptons of a faulty throttle position sensor?

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Old 02-24-09, 07:42 AM
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LEXSGSTAR
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Default Symptons of a faulty throttle position sensor?

Hi guys i'm driving a 06 gs300.Recently found the car to have sluggish acceceration and gearchanges..On light throttle inputs the car would be very jerky.I had just gone for the 80k km service,changed my spark plugs,atf and differntial oil.What is wrong with my car?Could it be the TPS that's causing the problem?On the other note,how do i reset the ecu?Thanks in advance for the help...

Last edited by LEXSGSTAR; 02-24-09 at 08:23 AM.
Old 02-24-09, 11:18 PM
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valgs350
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Try cleaning your MAF sensor, might help!

Bad TPS you should see your car idle higher than normal, depending of course.

If it was TPS your car should eventually end up in limp mode and throw a CEL light, very rare to see this on a 3GS though, doubt it would be TPS but you never know!

Get it checked out, just to make sure!
Old 02-25-09, 01:19 AM
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Thanks for your advice,will try to find the MAF sensor to clean..
Old 02-25-09, 09:24 PM
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Cleaned the sensor and my car is ok again,thanks to bro valgs350 for the kind advice..
Old 02-25-09, 09:28 PM
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arnieosp
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Originally Posted by LEXSGSTAR
Cleaned the sensor and my car is ok again,thanks to bro valgs350 for the kind advice..
Where did you find it?
Old 02-26-09, 11:19 AM
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Originally Posted by LEXSGSTAR
Cleaned the sensor and my car is ok again,thanks to bro valgs350 for the kind advice..
I'm glad it helped you out and saved you a trip to the dealer!

Didn't sound like a TPS problem!

Originally Posted by arnieosp
Where did you find it?
Any Autostore should have the MAF cleaner, pic and description in link below!

http://www.autobarn.net/maairflsecl1...te=google_base

Last edited by valgs350; 02-26-09 at 11:22 AM.
Old 02-26-09, 11:53 AM
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LEXSGSTAR, do you use a K&N air filter?
Old 02-27-09, 01:26 AM
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Originally Posted by The G Man
LEXSGSTAR, do you use a K&N air filter?
Yes,could that be the cause ?
Old 02-27-09, 05:35 AM
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Most likely, thats the cause. The oil from the K&N foul up the MAP sensor.
Old 02-28-09, 03:13 AM
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Originally Posted by The G Man
Most likely, thats the cause. The oil from the K&N foul up the MAP sensor.
If you run a K&N clean your MAF each time you change the filter or if you have your stock intake I would just buy a Blitz Dry Hi-Flow drop-in intake!

I know a couple 335i owners who blew Turbos cause the K&N screwed the MAf sensor which then screwed the twin-turbos over, hahahahah

edit:

What IS generally happening with tuned 335's is, peopel are not watching how much PSI they are boosting. They are putting on piggybacks without boost gauges and hoping they work correctly. As a result, a lot of people are running more boost then intended. Because of this, the compresser wheel is spinning way too fast and basically shredding. Now what happens to this is the shredded blades on the wheels are sucked and fly into the engine and just start to tear things apart.

Im not saying this is the only case, but this is what has been happening to 335's.
Just something to keep in mind!

Thanks L4wr3nc3

Last edited by valgs350; 03-02-09 at 03:55 AM.
Old 03-02-09, 01:41 AM
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There was probably too much oil on the filter itself. MAF sensors are very sensitive.

Originally Posted by valgs350
If you run a K&N clean your MAF each time you change the filter or if you have your stock intake I would just buy a Blitz Dry Hi-Flow drop-in intake!

I know a couple 335i owners who blew Turbos cause the K&N screwed the MAf sensor which then screwed the twin-turbos over, hahahahah

Last edited by DaveGS4; 03-02-09 at 07:06 AM. Reason: Removed baiting portion of post
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