Engine Starvation / Fluttering

[JThomas]

Within the last month, I have driven my '92 Z and have experienced a situation where the car sputtered/fluttered under acceleration. It almost seems as if the car had bad gas or something. After continued driving, the problem seem to go away.

At the time of the incident, the car had a half a tank of gas (Premium)

After the first occurence, I added an injector cleaner and last night when it happened, I added a fuel additive.

Do you think:
1. Bad gas
2. Injectors going bad
3. Clogged or dirty fuel line
4. Dirty or clogged fuel filter
5. Fuel pump issue
6. Wrong time of day??????

The car continued to drive each time, but it was a noticeable loss of power / acceleration.

Any insight would be helpful.

Thanks.