My 740 gl 1989 when on tick over or full throttle the engine cuts out and then burst back into life again like if you were driving along and turned the ignition off and back on again .?

It sounds like your 1989 740 GL may be experiencing issues related to fuel delivery or ignition. Common causes could include a failing fuel pump, a clogged fuel filter, or issues with the ignition system, such as a faulty ignition coil or connection. It’s also worth checking for any vacuum leaks or problems with the electrical connections. A thorough diagnostic check can help pinpoint the exact issue.