Ok I have a 98 gsr and I am having a problem with it at low rpms it is spittin and sputtering but once vtec engages it runs fin I am gettin horriable gas mileage and I have replaced my sparkplugs fuel filter and my o2 sensor because I am throwing a p0170 and a p0171 code does anyone have any ideas.

 

Perform a compression test.

 

and a leakdown test