Hello and good day. We have an issue with our GM 3.0 engine stalling for no apparent reason. Once it stalls it will start right back up and go. The unit just had a tune up 6 weeks ago. Mind you somedays it will run all day w/o stalling other days it will stall numerous times. No fuel leaks, very few vacuum hoses on the unit, all hoses are new. New fuel vaporizer, filter etc...Changed the ignition switch. New air filter. Checked all electrical connections at the starter. Puzzled...