Q: Speedo jumping and car stutters and cuts out upon acceleration

asked by on February 28, 2017

Brand new f23a1motor-brand new tranny, new clutch, new coil pack, dizzy, ecu, tps, wires, cap, rotor. Driving along push gas pedal speedo jumps all over. Car then sputters, hesitates, cuts out. Does it more often now. Can't accelerate with any throttle pressure. Please help
My car has a manual transmission.

Mass Airflow Sensor Replacement $171.84 - $740.29 Get a Quote

What you are describing sounds like a dirty or faulty mass air flow sensor. The mass air flow sensor monitors air intake as it is mixed with fuel prior to being injected into the motor. This sensor relays vital information to the ECM which uses this to make adjustments to fuel supply to the motor. A dirty or faulty sensor can cause an imbalanced air/fuel load to be supplied to the motor which results in an over fueling or under fueling situation depending on the conditions. This type of inconsistent fuel supply to the motor may cause a hesitation, loss of power, a jerking reaction, potentially a bit of black exhaust smoke and typically a strong smell of fuel when this sensor is malfunctioning. I would suggest having a professional from Your Mechanic come to your home to diagnose and inspect your vehicle.

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