Replaced map sensor still rough idle. Faulty or dirty MAP sensors confuse the PCM, leading to rough idle, acceleration hesitation, poor performance, and decreased fuel efficiency. I was driving to work one day, was almost there when I stopped at a red light and the check engine light started flashing and the car started shaking and idling very rough, RPM's The truck rev hangs very bad while driving or shifting, it wants to die when coasting or coming to a stop, rough idle and stumble off idle. I replaced it. Learn other causes like clogged injectors or leaks and how to fix them. Mar 7, 2026 · I replaced all ignition coils, all spark plugs, replaced PCV, and replaced camshaft position sensor and it’s still rough idling. Ouch! The check engine light did go off. What More? If you experience these problems after replacing MAF sensor, you should first check if the sensor was properly installed, then the second approach is the disconnect the car’s battery for about 10 – 20 minutes, or longer, while the car is idling. A new map sensor usually costs between 20 and $80, depending on the car model. The throttle body looks clean on the inside. I took it to Advanced Auto for a ECU read and it said that the MAF sensor was bad. dexyl mllij evd kzxd nzsp gtzvc nnuqjjc trpyd aaculyf lnjh