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I gave my camry a tune up because when I hit the accelerator the car makes a low muffled bog/stutter-like sound at first(under 1500rpm) and then the revs pick up normally(1500rpm- up). The tune up did not fix this issue. I also changed the fuel filter. What would cause this? Could it be a bad cat. convertor? When you "mash" the accelarator, the rpms should take off without any hesitation.

the car is a 93camry l2 2.2 with 90000 miles. Runs like a champ.
 

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400whp club here I come!!
HT MR2 Turbo
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Check for exhaust leaks. Might want to try cleaning your injectors also. My 5sfe acted similar with an exhaust leak.
 

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check, also, your throttle position sensor. one of its main functions is to detect sudden changes in throttle, much like an accellerator pump on a carb.

dave
 
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