Q: Engine "Hiccup"
Recently, when I pull up to a stop light and my car idles, I feel a "hiccup". It is a fairly rough idle followed by what seems like a misfire, but no engine codes have appeared. I have changed the purge control solenoid and the fuel filter in hopes this would solve the issue. No luck. I cleaned the throttle body with no luck at solving the problem. I thought it may be the MAP sensor, but a mechanic told me that the GM MAP Sensor is very reliable and unless it hasn't been diagnosed as the problem I should not change it. The entire motor was changed along with the spark plugs about 4 months ago. Most recent oil change about 2500 miles ago. I am at a loss for what may be causing the issue. Clogged fuel injectors? Dirty PCV hose? Please help. Thank you!
My car has 163000 miles.
My car has an automatic transmission.
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Hi Taylor. Thanks for contacting us today. There could be multiple issues causing the symptoms you’re describing. Sometimes it’s as simple as a clogged fuel injector, loose electrical harness connection or a vacuum leak that can cause rough idles or a random misfire. However, it’s also common for multiple issues together to create the symptoms. Since there is no clear-cut or easy to answer diagnosis that we can offer, it’s best to have a professional mechanic come to your location to diagnose the symptoms - by completing an on-site inspection first, before attempting or chasing repairs.
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