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19/08/2022 9:45 am
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Hi I have a 2002 Saturn l200 4 door with over 156,000 miles.when I drive the rpm goes up and down when going over 50 mph. I changed the air filter, idle air control valve, throttle sensor and 3 months ago had to get a new fuel pump and starter. Help please. 🙂
2 Answers
2
19/08/2022 9:58 am
What was revealed when you scanned it for codes and recorded live data? Was the fuel filter replaced along with the fuel pump? How old are the spark plugs?
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19/08/2022 10:57 am
Check for a vacuum leak at the intake manifold, clean the MAF sensor, get a new PCV valve. If you have one, check or clean the MAP sensor.
