1970 Datsun 240Z — going one inch smaller for winter wheels — trying to narrow this down

Intermittent stuff lies if you only catch it once. If a shop can't duplicate it on the 1970 Datsun 240Z, bring a video plus freeze-frame data, not just a story. If the cheap test changes it, stop and reassess. On “going one inch smaller for winter wheels,” that was the fork that mattered for me. Verbal 'we'll take care of it' is not a plan. Not driving it hard until I know more.

I wouldn't throw parts yet. Swap the cheap/easy piece first on the 1970 Datsun 240Z and see if the fault moves. If the cheap test changes it, stop and reassess. This is from a 1970 Datsun 240Z in Columbus. Did the worksheet show tax yet? If the story changes I'll post the new data.

I'd want a measurement, not a hunch. If a shop can't duplicate it on the 1970 Datsun 240Z, bring a video plus freeze-frame data, not just a story. If the cheap test changes it, stop and reassess. When does it actually happen? If the story changes I'll post the new data.

This is usually cheaper to test than to guess. Get a real battery/charging test on the 1970 Datsun 240Z, not just resting voltage, before blaming a module. Don't erase codes until someone who can help has seen them. This is from a 1970 Datsun 240Z in Columbus. Was this after sitting overnight? I'd rather look cautious in this thread than stuck later.

Log the conditions before you spend. Move a coil or plug on the 1970 Datsun 240Z if it's cylinder-specific and see whether the code follows. That's the branch I'd chase this week. On “going one inch smaller for winter wheels,” that was the fork that mattered for me. Was this after sitting overnight? I'd rather look cautious in this thread than stuck later.

Start with the test that can prove you wrong. If a shop can't duplicate it on the 1970 Datsun 240Z, bring a video plus freeze-frame data, not just a story. Don't erase codes until someone who can help has seen them. A shop burned me once by skipping that step. Wrote this up on my lunch break.