UK Car Repair Questions? Ask a Mechanic for Answers ASAP
if the car still drives badly / worse with the MAF disconnected
then its unlikely to be the issue
I'd suggest the next step is to check for a lack of fuel and a lack of fuel pressure from the electrical pump at the tank.
If the connections to the pump are corroded or damaged then the pump could stop at any time or could not be running at full speed. Check that its relay switches in and out and the relay contacts are clean and bright – replace the relay if in any doubtand do the same for the fuse,
Ideally measure the pressure at the injectors and if this is low check the pump as described and also consider changing the fuel filter as if this partially blocked this too will reduce pressure.
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