Ive replaced the maf to a new one. And all the pipes from maf to throttle in case of vacum leak.

The car now runs and doesnt stall but it struggles to go past 40mph and kangaroos, also the exhuast sounds like its popping.

Any sugestions what up with it?

People have suggested its the maf, temp sensor, ecu.
Originally it kept stalling. There is no error codes.

 

Mine was a faulty spark plug causing cylinder 4 misfire but had a error code. Might be worth a try.

 

First thing i replaced when it happened.

 

ignition leads?? or coil pack!

 

im guessin the ignition leads plug into the coil packs?
Can you test if one of them is doggy?

 

This might help

 

i had this exact problem and everyone on here said maf, plugs or coilpack. After an hour on the ramp at work i found the turbo intake pipe had i tiny split in the end, and the inlet manifold gasket was leaking. Runs like new now!