2003 Pontiac Sunfire Lack of power, low milege

Tiny
ACADIAN1657
  • MEMBER
  • 2003 PONTIAC SUNFIRE
  • 4 CYL
  • 2WD
  • MANUAL
  • 210,800 MILES
I have replaced the plugs, and cleaned up the top end module. 1 plug seemed fouled due to oil.I have a new fuel pump, and the injectors were cleaned and serviced 4,000 miles ago.
I have gone from 32MPG tp about 6MPG, the car is weak going up a hill, and has very little power. There is a slight whistle when driving, and the car sounds a little loud. First time here, and will donate if indeed my questions are answered. I do not like sending money info without t\knowing the receipent
Do you
have the same problem?
Yes
No
Monday, November 8th, 2010 AT 11:12 AM

1 Reply

Tiny
JDL
  • EXPERT
You may need to do a compression test? I'd have to go through the basics. Use a gage and check fuel pressure. Any applicable trouble codes? If this vehicle is a normally-aspirated four, they don't have much power, anyway. Just my opinion, which usually isn't worth much. NO tranny issues? Sometimes the coolant temp sensor can cause fueling issues? If you use a gage to check fuel pressure, the gage may show if there is leak?
Was this
answer
helpful?
Yes
No
Monday, November 8th, 2010 AT 12:05 PM

Please login or register to post a reply.

Recommended Guides