My 91' RT/TT will not run with the MAF pluged in. Runs decent without it. I took the engine out to put lifters, new turbos, and engine gasket kit when i bought the car. I had the ECU rebuilt and I've tried 3 different MAF sensors. When the MAF is pluged in you can hear the fuel pump relay clicking and the car will stall unless you hold it @ full throttle. Any help will be greatly appreciated

 

The oem air box had been removed and there is a filter hook directly in front of the maf. I disconnected the wire for the air flow sensor and now it will idle by itself with the MAF pluged in. Is it reading to much air flow through the sensor without the factory box????

 

this is just a thought but the crank shaft position sencor can make a car die, but if it is the mass air flow you might need to check the size for flow matter (highly unlikely though)

 

Also, try checking the Idle Control Unit under the throttle body. I had the problem where it would stall if not holding the gas. First I changed the MAF but that wasn't it.
There are some guides on the net on how to check it.