My truck has a rough idle on start up what is wrong?
Nov 15, 2011 at 5:09 PM
rough idle on start up?
TIM LENE
- MEMBER
- 1 POST
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Hello,
Does it only have rough idle when you first start it, then it runs normal?
It could be a vacuum leak that goes away after the engine components warms up.
https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge
It can also be due to weak spark plugs, or dirty throttle body or air flow sensor.
Sometimes rough idle can trigger the check engine light.
Is your engine light illuminated? If so, having the vehicle scanned can help with the diagnostics.
https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing
Please let me know of any questions.
Thank you.
Does it only have rough idle when you first start it, then it runs normal?
It could be a vacuum leak that goes away after the engine components warms up.
https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge
It can also be due to weak spark plugs, or dirty throttle body or air flow sensor.
Sometimes rough idle can trigger the check engine light.
Is your engine light illuminated? If so, having the vehicle scanned can help with the diagnostics.
https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing
Please let me know of any questions.
Thank you.
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Oct 7, 2021 at 8:27 AM
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