Drove 1999 Blazer 20 miles after battery disconnected til died. What did I do????
#21
11-06-2018, 01:14 AM
Originally Posted by Tom A
Since it will run on starting fluid, I think we can safely assume it's a fuel problem.
Originally Posted by Tom A
If I had to guess, though, I'd say you damaged your PCM and it's not firing the injectors.
#23
11-06-2018, 04:46 PM
The sensors are operating on 5VDC, so the ECU surely has an internal voltage regulator. Most of the modern voltage regulators have the input capacitors of high capacity, that will accumulate the spikes, and they (the regulators) are usually able to survive somewhat a higher voltage than 12V. Possibly it might have a varistor too. I haven't been looking the exact board, but if it was designed well, it probably has a fuse + transil diode right on the power line input. If voltage goes above the certain level, the diode shorts and blows the fuse. There are many ways to protect for reversed polarity/voltage surge and so on... Although I am not 100% sure in this very case, I'd bet on that 
#25
11-07-2018, 12:25 AM
I don't like guessing. It's like a handicapped engineering. We need the test results. But still remember this:
https://blazerforum.com/forum/2nd-ge...e2/#post696975
and I have the feeling it might be related.
https://blazerforum.com/forum/2nd-ge...e2/#post696975
and I have the feeling it might be related.
#26
11-07-2018, 03:30 AM
So was the truck restored to working order after the gas tank incident and before the battery swapping incident and if so what was the fix? Was it ever determined what got put in the gas tank from the first incident?
George
George
#27
02-02-2021, 11:09 AM
You may need a battery disconnect switch. Best ones are a knife switch. Trying to find a good remote battery disconnect switch, bought one from China and can't get through the directions to make it work.
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pmezo
2nd Generation S-series (1995-2005) Tech
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07-17-2012 01:29 AM
