Investigating "the why's" of diagnosed problems
Posted: Tue Oct 30, 2018 10:28 pm
Generally when I find and fix problems, I'll often still waste time continuing to explore why the part failed when it did.
Over the weekend I found the sons VS V6 was hitting a brick wall at around 2800 rpm, got to wondering if the fuel system was keeping up, did a few tests and determined it wasn't.
Threw a pump and filter at it tonight, a lot of black crap fell out of the filter when blowing in the opposite direction, though it still flowed OK, changed it anyway, though now the new pump is in it, it's back to pulling to decent rpm again, though it's now actually too rich, and has to be re tuned.
I noticed the end of the pump where the lead plugs in looked as though it may actually pry off, thinking it's probably where the motor brushes are I attempted to do so, and sure enough it did.
And what do I find, one of the brush leads was not only broken, looks as though it had been for a length of time, it was black and nearly completely arc'd away as though it was making and breaking contact for some time, odd considering the car never cut out, guess the spring was probably taking the brunt of the current too.
Over the weekend I found the sons VS V6 was hitting a brick wall at around 2800 rpm, got to wondering if the fuel system was keeping up, did a few tests and determined it wasn't.
Threw a pump and filter at it tonight, a lot of black crap fell out of the filter when blowing in the opposite direction, though it still flowed OK, changed it anyway, though now the new pump is in it, it's back to pulling to decent rpm again, though it's now actually too rich, and has to be re tuned.
I noticed the end of the pump where the lead plugs in looked as though it may actually pry off, thinking it's probably where the motor brushes are I attempted to do so, and sure enough it did.
And what do I find, one of the brush leads was not only broken, looks as though it had been for a length of time, it was black and nearly completely arc'd away as though it was making and breaking contact for some time, odd considering the car never cut out, guess the spring was probably taking the brunt of the current too.