There is a factory service note on the filter capacitor that could solve the
problem.

I think the eminent Mr. David Beierl (sp) has details on the installation.

In essence, the ECU receives a faulty signal from the air flow meter.  The
nature of the signal is noise imposed on an otherwise slowly changing
voltage.  The ECU then defaults to shutting off the injection pulses until
the signal is less noisy.

I would suspect a slightly worn or dirty contact set on the AFM but
installing the capacitor is an upgrade that will help "tune" the AFM
circuit.

That factory piece is a plug in upgrade.  But it's pricey.

pensioner