[xj40] Bad components testing good

And good components testing bad.

After changing my starter to find that it was not completely shot
and going nuts to find a starting problem, it turns out to be the
first thing that was suggested on the forum and the first thing I
had tested. The battery is bad! I brought it to a local auto
parts chain store and they tested it on their computerized senerio
testing machine and pronounced the battery good. When I was
begining to start re-testing things I tried to boost the battery
with another car, and thought that since that didn’t work the
battery must be good and the problem is yet to be found. Today I
tried again, this time with a battery charger with an engine start
setting. It started and the trans warning light went out.

Several months ago, I had a problem with my Volvo that I posted to
a Volvo site. The first suggestion was the mass airflow sensor. I
tested it according to the repair manual, thought it was good and
went nuts looking for other possiblities. When I gave up and took
it a garage, it turned out to be, you guessed it, the mass airflow
sensor.

The lesson is:
Don’t ask me to test the components on your car, and don’t always
believe that anyone else has done it right either.

Happy motoring,
Dennis
1990 XJ6–
Dennis Rogan
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–