My '91 940T is stilling running strong at 175k miles, but recently the motor has just quit for no apparent reason 4 times in recent weeks. Three times while driving; once wouldn't start. Each time, a few minutes later, it starts like nothing happened. It popped a 1-4-4 code and after researching the FAQ's, it seems I should try replacing (or repairing) the Fuel Injector Relay and/or the Radio Suppressor Relay (yes, I know it doesn't have anything to do with the radio...) Is this a wise approach? The relays are not that costly, so I am willing to give it a shot if there is a good possibility this will fix the problem. Might there be another likely culprit? A particular connector that fails often? Any other suspect relay or sensor? It is not the RPM sensor as I already had a problem with that a year ago. Diagnosed it from the FAQ's on this site and replaced it. It's still in good shape. Any help would be appreciated.

Hi,

Locate the relay and tap on it when the engine is running, if the engine stalls you may have a bad relay or a bad connection.