Thats because it doesn't have one.
1989 uses a speed density system with MAP sensor, but MAF or MAP wouldn't cause your issue.
Hope it wasn't a car dealer with that kind of advice, card dealer, antiques dealer maybe :)
Anyway your 1989 2.9l engine will have a TFI ignition system, one of the more common issues with these as they got older was a no start after engine was warned up.
Read here: Ford EEC-IV/TFI-IV Electronic Engine Control Troubleshooting
Usually you need to replace the module on the distributor.
One thing another fellow did was to carry a bag of ice, after warm up and no restart he put the bag of ice on the TFI module, and let it sit there for a minute or so.
Engine started right up, normally he said it took at least 10-15 minutes before it would start again.
He replaced module and all was good after that