I've asked a question about my issue before and have new information I believe may be helpful. My issue was that my car was idling rough, but only after shifting it to park or neutral. The RPMs bounce from 500 to 1,000, and it's only after driving then going to neutral or park, it idles fine at a stop light. I've been getting a pending error code P219A and have ran checks on it using a reader I got off of Amazon. I have tuned the car 4 times with different companies and on a dyno with no resolution. I've cleaned the throttle body, cleaned the MAF, changed the spark plugs, just replaced all O2 sensors, put seafoam in the tank and still nothing. The modifications are a cold air intake, long tube headers, and high flow catalytic converter X pipe.
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Tuesday, October 10th, 2023 AT 7:12 PM