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odd start

:mad2::mad2: was quiet those few past days, and till yesterday she does it again. Luckily, I'm still able to start, but this intermitent problem is driving me nut :WTF:

I have access to a PCM from a 1994 truck with manual tranny. By swapping the chip, I might be able to use it and see...

I forgot to mention that she was also showing hicups, iddle or driving. Several hicups which calm a bit after replaced my flight system PMD with a used Stanadyne, but still get some; less but still some.
One time I was cruising at 140~150 kph, strong hicup, MIL ON, and then she was junky the next start. :skep:

BTW, is there any kind of main Power Switch hidden under the dash, above the brake pedal? Each time I key ON, I can hear a slight "ssshh" noise for a second in this area, but I can find what is doing that, relay, actuator????
 
The glow controller is right on the other side of the firewall, and its output runs to the glow fuse under the dash and over the computer so it knows the voltage is to the glows while it says it should be.

The noise could be an air damper or something?

The short glow would be from something in the circuit shorting or the PCM is losing the constant battery voltage, or the PROM is losing power from the PCM from some fault. losing ignition voltage wouldnt do it. The same wire that provides the battery power also powers the OPS/LP, so I wonder if there is anything flaky about that circuit.
 
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