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RPM's bouncing between 2000 rpm to 1500 rpm
Hi all,
I have a 2001 Chevy Impala 3.8 with 191,000
Over the past couple of weeks I have been working on my car, because of the EGR valve Code came on (P1404 & P0404). Changed out the EGR Valve and code came back after clearing the codes.
Then I went back and took the EGR valve back off along with the throttle body, and cleaned everything with carb cleaner. Cleaned the MAF sensor with MAF Sensor Cleaner. Took off the MAP sensor to check the PCV valve, and the MAP sensor had snapped into two piece, so I replaced that sensor as well. Changed the air filter, and changed the oil, and put in Sea Foam in the gas tank when I filled up.
Got the code to go away on Saturday and now I have an issue with the RPM’s Bouncing when doing around 35-45 mph RPMS bounce back in forth between 2000 and 1500. Feel’s like a wave on a boat. This happens not during acceleration, but when easing up on the gas to maintain the speed. I have noticed this only in the 35-45 MPH range, so Far any how.
It’s not thronging any codes at this time, so not really sure where to start.
Any help would be appreciated.
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