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Over Boost with bucking after oil change and air filter cleaning.

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Old Oct 10, 2011, 11:47 PM
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Question Over Boost with bucking after oil change and air filter cleaning.

This weekend I changed my oil and cleaned my air filter. After this I drove fine until i hit 26-28 psi in fourth and fifth gear normal for my tune is 24.5. I have had my tune for a year and no issues like this until now. I clean my filter every 5k and used the same oil. Any ideas on what my issue could be?
Old Oct 11, 2011, 01:47 AM
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Not sure what would cause that but IIRC, disconnecting your battery for a bit will solve a number of odd problems like the one you mentioned.

Last edited by umopp; Oct 11, 2011 at 11:04 PM.
Old Oct 11, 2011, 07:16 AM
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Its that time of the year again. The weather gets colder and the overboosting starts!
Old Oct 11, 2011, 05:42 PM
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Regarding overboosting in cold weather, my little IAT Adjusted BWGDC patch would help...




At time of writing, it's available for most X SST ROMs. Details here.

Rich
Old Oct 11, 2011, 07:34 PM
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probably just the weather
Old Oct 11, 2011, 07:56 PM
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Make sure you didn't knock somethign loose in the air box or on the intake pipe, check all of your boost control vacuum lines.
Old Oct 11, 2011, 08:18 PM
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Thanks. I'll try those things.
Old Oct 13, 2011, 04:55 PM
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So, Ive got a new problem, while hard accelerating, I am going lean. So I am thinking that my fuel is running out, fuel pump or dirty injectors? But that still doesn't explain the over boosting. I could use some advice, Ive got the Blue relay installed as well.
Old Oct 13, 2011, 05:55 PM
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OK, got some good news, the leaning was fixed by a new fuel pump relay. But I'm still hitting up to 28 psi of boost, no more bucking either. Now I'm debating on if i should get a re-tune.
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