I have a 2003 chevy silverado with a 4.3l that has over time lost alot of power. Does anyone know of an inexpensive way i can get power back to my old truck?

Asked by Jul 20, 2013 at 01:53 PM

Question type: Maintenance & Repair

2 Answers

101,935

First thing you need to check is the exhaust back pressure, that is something that will slowly increase over time and will slowly reduce engine performance, have you checked compression, replaced spark plugs, air and fuel filters, checked fuel pressure and flow. Do you have a lot of blow by from the crankcase there are a lot of engine basics that need to be covered before you can really say what is wrong.

70,875

Check the valve timing. Perhaps the timing chain is worn and stretched causing the valve timing to become retarded (late). Check the knock sensor circuit for proper operation. Especially if you've developed a valve tap. HTH.Jim-Jim

Your Answer

Shortcuts

Maintenance & Repair Experts

  • #1
    Tom Demyan
    Reputation
    181,780
  • #2
    dandyoun
    Reputation
    96,040
  • #3
    tennisshoes
    Reputation
    79,660
View All

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.