I searched but did not find exact issue mentioned.
Yesterday I was checking some things out and found that all 4 fuses for engine management are much lower than everything else.
They're all ~12v when the engine is running, but everything else is ~14v.
So the pcm, maf, coil, icm, injectors, o2 sensors and trans. are all only getting 12v.
Seems odd to me, is this a known issue/problem on a 1994?
Agh...found the problem.
Ignition switch output 13.9v to aftermarket alarm module.
Coming OUT from the unit is only 12.7v and it fluctuates slightly as well.
@ underhood fuse unit, it's a little lower which would be normal for the length of the wire run.
The installer did a decent job, the loss is from the control module itself.
Ah the joys of aftermarket products
Yes, it was grounded well.
Less than an ohm when checked to multiple locations.
Even put a jumper on it to test.
Still huge voltage loss so I bypassed the turd and problem solved.
Rock solid 13.6 @ fuses now.
The low voltage would very likely explain some intermittent oddities I could never figure out.