Fuel consumption, engine humming and whistling

Tiny
TROJAN2131
  • MEMBER
  • 1999 HONDA CRV
  • 4 CYL
  • AWD
  • MANUAL
  • 162,000 MILES
I'm experiencing excessive gas consumption, 7-8 mph less than normal. What could be contributing? I have been hearing a high-pitched humming or whistling from the engine, I think, especially when I'm accelerating at higher speeds. The check engine light is always on. I think I feel a misfire when it's idling, but I just changed the spark plugs, wires and distributor cap less than 2 years ago. There are also fluctuating idling speeds. I'm not sure if the problems are connected, but what might some of the possible problems be? The diagnostic codes are P0300-P0304, all five of them.
Do you
have the same problem?
Yes
No
Tuesday, January 11th, 2011 AT 8:55 PM

1 Reply

Tiny
KHLOW2008
  • EXPERT
When the CEL is turned on all the time, fuel consumption and performance would be affected.

P0300 - P0304 are misfiring codes and it could be anything from bad spark plug and/or wires to faults with fuel pressure.
2 years is a long time and anything from contaminations to failed components can cause the misfire.

It is not possible to comment on the noise as its source is not clear.
Was this
answer
helpful?
Yes
No
Friday, January 14th, 2011 AT 5:54 PM

Please login or register to post a reply.

Recommended Guides