Possible ground issue
#14
The grounds he is working on isn't as simple as just grounding the body to the engine, they run inside to ground internal circuits and such. Gm in their eternal wisdom grounded them to the back of the engine heads and a real PIA to get too.
#16
I have seen:
- additional grounding wires (they claimed that without them the starter is not cranking), but in fact the starter was gone. I could figure it out after I've replaced a sized battery, that had around 0.3V and was about to blow while charging
- they said they see the spark on the plug terminals, but they used a short type of a different spark plugs. So short, that the plug terminals were half way the thread. The spark energy measurement? "LOL how do You do that?"
- a high voltage wires caps were torn, and the distributor top cover was all loose due to oversized screws that broke off the tabs so it had been a temporary fixed
- I couldn't get the fuel pump running, but after all they told me, they used one of the dash switches as a kill switch, while the engine runs on LPG (in fact, the LPG installation should switch over by a set of electrovalves). The wire to a fuel pump was resembling a telephone wire... Then I've spotted the pump. Not into the tank, but attached by a zip ties underneath the floor of a back seat. Of an unknown type, pressure....
Nah. that time I gave up. That was first time in my life I have seen such a mess.
Long story short - a friendly advice - temporary is only allowed, when You want to confirm Your troubleshooting. Right after, clear temporary things and do it right way.
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