I need some help troubleshooting some issues with my car. First of all, I need to try at least three times before the car starts. It runs fine for about 2 hours and then the misfires start and in about 30 minutes it shuts off.
After it shuts off I need to wait until it cools down to start again.
I have a BlueDriver and it shows 4 permanent codes:
P0171 - Fuel Sys-Lean-B1
P0102 - Mass or Volume Air Flow Sensor "A" Circuit Low
P0113 - Intake Air Temperature Sensor 1 Circuit High Bank 1
P0300 - Random/Multiple Cylinder Misfire Detected
What I've tried so far:
1. Change the Mass Airflow Sensor
2. New spark plugs
3. New ignition coils
Could it be the fuel pump (it says fuel sys lean but I can't find any vacuum leaks), if so, why would it fail when the car gets hot?
When I am revving it feels normal, when it's idling it's rough.
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Wednesday, October 27th, 2021 AT 3:40 PM