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 BOBBYSS Your Own Question
BOBBYSS, Master Technician
Category: Chevy
Satisfied Customers: 17474
Type Your Chevy Question Here...
BOBBYSS is online now
A new question is answered every 9 seconds

1995 chevy 5.7. idles rough but under load gets worst. More

Customer Question

1995 chevy 5.7. idles rough but under load gets worst. More of a surge. Not always constant.
Submitted: 1 year ago.
Category: Chevy
Expert:  BOBBYSS replied 1 year ago.

Hello, my name is Bobby. Thank you for the question. Can you tell me if the check engine light is coming on when this occurs? Does it seem to be worse when the engine is hot or cold? Does it ever run perfectly fine?

Customer: replied 1 year ago.
At idle the RPMs vary up & down by 3-4 hundred. Put truck in gear and it gets worse. The engine light came on when scan tool was connected. It flashed 1 time then a slight pause and flashed 2 more times. Always runs rough hot or cold. If I give it gas you can't feel the condition only when at idle or truck in gear sitting still.
Expert:  BOBBYSS replied 1 year ago.

Thank you. It sounds like you may have an internal engine failure or it may be a bad sensor. When was the engine last tuned up? Do you have a vacuum gauge to run some tests?