91 PA won't run

My 91 PA will not stay running, I've changed plug wires, IAC, cleaned all contacts on the Ignition module, checked fuel pressure. It will start but not stay running it has a very bad idle . I pop off the MAF and put it back on and the car ranning fine . I left to go to the wreckers to pick up another one but they didn't have any for my car, I didn't have time to go to the others to as they where all closed, the person driving me showed up to late at my house.

Even when I got the car running I could pull the MAF plug off and the car would run fine. But now the car does not run, starts and stalls.

Any help?

Thanks.