[roamer_1]

Seriously, what’s so hard about plugging in a scanner and reading the information there? It’s a lot easier than figuring out why your Edelbrock 1405 suddenly started going super-rich for no apparent reason.

What's so hard about being a mechanic and working without the meters?

The problem occurs when you are broke down on the road- Where I live, especially with a pickup, that can be 50 miles from nowhere real easy, with no cellphone, and probably no CB (mountains are like that). The more complicated the system is, the less likely one is to have the part onboard, not to mention having the tools and whatnot available to complete the repairs. Pre '85, converted to HEI ignition is a pretty simple system. Barring a catastrophic failure, onboard parts are negligible, and I can tune it by ear just about as good as a meter can do.

[Spktyr]

Okay, tell me how you diagnose a HEI module failure without a meter, by the side of the road.

Pssst - being a mechanic means knowing what tools to carry. A pocket scanner and a multimeter is a must - the multimeter is essential even on non-computer cars.