Chevrolet lacetti engine fluctuating

Hello guys. I have a chevrolet lacetti which is fluctuating rpm very strangely and very high at idle and low speeds. The problem happened after a head gasket replacement. The car has new head gasket. Egr. Crankshaft sensor. Camshaft sensor. Spark plugs. Spark plug wires. Spark plug coil. New gaskets almost everywhere. I tried to find a vacuum leak but nothing. When i connect the code reader it doesn’t find any trouble codes. I did notice though that when i accelerate in neutral that my maf sensor is showing the pressure dropping instead of increasing. I disconnected the maf sensor and the car almost runs normal. It does jerk a bit on low speeds but i am assuming is because it doesn’t have the maf sensor connected. Any ideas what it could be?. Is it a maf sensor faulty? It wasn’t before the head gasket replacement.

Stay with your original thread, starting a 2nd thread is not a good way to get help.

Carolyn: Can you merge the OP’s new thread with his original–identical–thread?

A post was merged into an existing topic: My lacetti revs up in a strange way