I'm trying to diagnose a 2002 Ford Focus with a zetec engine.

Car: Ford, Focus, 2002, 16 valve zetec - Back to Fix-It - Ford Repair Manuals

Q.I'm trying to diagnose a 2002 Ford Focus with a zetec engine. It stalled and the owner replaced the fuel pump. It fires up but still hard to start and when it starts it has a rough idle and sometimes it won't even idle. When engine is running on park, when you try to rev it up it stalls.
The owner also replaced the spark plug and wires and also the mass airflow sensor. I checked the timing to make sure that the belt did not jump and timing belt is aligned properly. After replacing the fuel pump and before replacing the spark plug and wires and air flow sensor the owner said that it pulled a code P1132. They erased the code and now no code at all will come up. I checked the spark plugs and they are all black and not burning good. One had suggested that there might be a leak from the intake manifold gasket and one guy suggested that the injectors are bad. Please help me diagnose the problem.

More Info required When you can get it to idle, what is the engine vacuum at?

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I'm trying to diagnose a 2002 Ford Focus with a zetec engine.