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Ok I just got my 01 civic coupe back from the honda dealer. I took it there to get the SRS light fixed, my power door locks fixed, and new battery put in.
Driving it home I noticed the car is much more unresponsive and sluggish now. When it used to accelerate nice and quick it now feels very crippled.
Even with the gas pedal fairly far pressed, the car gains rpms very slowly, almost like its struggling to get into the higher rpms.
I have no idea what could have caused this, and I'm kinda afraid this is a total newbie question.
But what do you guys think is the cause of this?

Also I have an Injen cold air intake, dc sports headers, and thermal R&D cat-back exhaust.

 
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just a shot in the dark, but i heard that when your battery is disconnected it resets the ecu. maybe its relearning your driving style? i dunno. any help guys?
and im pretty sure you only have one header

 
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ya after about a day of driving it went back to normal maybe it was the ecu thing.

Haha typo on header

 
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Also a shot in the dark!

Have you seen the DIY on the throttle adjustment????

If not check it out Gearbox wrote it! If you havent done that...

TRY IT!!! Youll get some more "throttle responce" that your "lacking"

just my .2