How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Dave Nova Your Own Question
Dave Nova
Dave Nova, Buick Technician
Category: Buick
Satisfied Customers: 1808
Experience:  ASE Master Certification. GM World Class Certification
Type Your Buick Question Here...
Dave Nova is online now
A new question is answered every 9 seconds

Working on a 2001 buick century looses power under load or

Customer Question

Working on a 2001 buick century looses power under load or not when reved up. sensor readings look normal, but I notice when it happens it goes from closed loop to open loop. checked the cat. too. any Ideas?
Submitted: 2 years ago.
Category: Buick
Expert:  FIXITMAN replied 2 years ago.
Hello, my name is***** for the question. If I am not online when you return please give me some time to get back to you. Can you tell me if the check engine light comes on when this occurs? Can you tell me what your fuel trim readings are?
Customer: replied 2 years ago.

No Check engine light, Tried unhooking some things to force the light on but no light. Does come on when the key is on.goes out after starting.

fuel readings start 3. something up to 10. but drop off when goes into open loop.

Expert:  FIXITMAN replied 2 years ago.
Does the engine act like it is misfiring when this occurs or is it just lacking power?
Customer: replied 2 years ago.
Spark is fine no misfires. Pretty sure its fuel pw drops to 0.00 . Have you heard of a bad diode in the alternator causing ecm interference?
Customer: replied 2 years ago.
So I guess your done helping me?
Expert:  FIXITMAN replied 2 years ago.
Sorry, I was sick the last few days. Did you still want some help with this?