On Sat, 27 Feb 2021 11:42:07 -0500, Ed Pawlowski wrote:

On 2/27/2021 11:15 AM, Fred wrote:


"Ralph Mowery" wrote in message


but once anything gets into the electrical system it will
take a lot of training and skill to solve the problem.

That's bull**** on the training. It isnt hard to check the plugs
to see if one of them looks bad and to try moving them around
if they look fine. And to try new plugs, that doesn't cost much.

Same if one of the electric windows stops working or the battery
goes flat much more quickly than it had done when it was new.

What about the ECM? Does you guy have what is needed to check it out
and change parameters? What about the many microprocessors? How do you
track them down?


The ECM should flag errors on any attached microprocessors and they
are pretty good at finding bugs in themselves. It is usually the
bottom call in the MAP. The reality is they don't fail often enough to
be a huge concern and when they do it is going to be a dead soldier,
an input line receivers that failed or have a bad output driver. A
meter or maybe a scope should show you that. Most shops don't use
scopes, not that kind anyway.
People, particularly shade tree mechanics and old timers just have
brain freeze when they think about computers.
The ECM makes it easier, not harder.
The states trust them enough to have abandoned tail pipe inspections,
trusting the ECM will tell them if a car is not running right and
polluting. That usually also results in performance issues.
I wouldn't open the hood for an engine problem that isn't leaking
something until I scanned for codes. Same with my outboards.