Jerry,

"Try turning on and off the ignition switch a few times (but w/out cranking) to have the fuel pump solenoid engage to re-prime the fuel line. If the car then starts, this is the problem."

Thanks very much for your suggestion. Already tried this, and tried it again just now but with no ...

Jimmy57,
Thanks very much for your recommendation...

No, I hear no buzzing noise when tach does its dance. Sometimes hear a clicking noise with the orange warning triangle between speedometer and tach flashing with error message "urgent engine attention required" but it does not always do this, and ...

Volvo V70 2001, 103K miles. Starts and runs well for days at a time
But at imes will exhibit these problems
-will crank but not run.
-tachometer swings wildly from zero to Maximum and/or in between.
-if I pump accelerator, car will usually eventually start running then all is well.
-this ...