Honda Civic LX 1998: Engine roars,idles high,requires shifting at low speed/rpms on 1998 Honda Civic

Suddenly, upon start up, the engine roars and revs up to 1500rpm (2x normal). 5 speed manual transmission continues to roar especially when shifting up or down. When speeding up, shifting must be done faster than normal (i.e-when speed reaches 40mph, engine roars ever louder, and requires shifting up from 3rd to 4th gear when engine gets up to about 2000rpm instead of normal 3000). The engine isn't overheating, and no other signs of major engine failure (no backfiring, smoke or exhaust, etc.). Just sounds like a loud sports car or motorcycle with any muffler). Thought maybe just the muffler or valves but what could explain the need to shift up so quickly, loss of power in general)? Thanks

by in Pleasanton, CA on July 13, 2012
1 answer
ANSWER by on October 06, 2012
check all vacuum hoses from air intake maybe one of your hose not connected, you can also try adjusting your idle speed screw from the throttle body. keep us posted and good luck