I apologize if I'm not posting according to all of the rules. I'm new to this forum (joined today) and am desperate to fix my car. I have almost $1500 in parts in it and it's still acting up.

I have a 1986 4-speed manual with overdrive 740 GLE. I've used the Volvo Maintenance FAQ for the past couple months trying to diagnose the problem. I recently spent $100 on an inspection at the volvo dealership. Head mechanic with 24 years experience couldn't figure out the problem.

I've replaced the MAF sensor, ignition coil, both fuel pumps and filters, ECT sensor, spark plug wires, spark plugs, rebuilt the distributor and replaced the crank pickup, fuel pump relay, ignition control module, and cleaned the grounds on the intake manifold and battery harness to frame... maybe some other things I'm forgetting. I've ordered a new ECU and o2 sensor, so I will see how those work this weekend.
The mechanic said the fuel pressure is fine and the fuel pressure regulator is in good condition. IACV works -- if you unplug it the engine rpms change a lot.

The symptoms have changed since I replaced the MAF. Before, they were intermittent, or only when the car had warmed up and been driven for 20 or 30 minutes at operating temp. Now, the car dies if I take it past 2k or so rpm and let it drop to idle. Every time I push the clutch while rolling in a gear, even as low as idle rpms, it dies. On a cold start, it will idle fine for a few seconds, then rev up a little and fluctuate then die. Normal operating temp idle is very rich and smells like gasoline and has a misfire. Any throttle or letting off the throttle causes the car to jolt like it's going to or from 0 fuel or air.

A couple days ago the radio fuse blew and the door bell for the key in ignition started ringing while driving down the road. I replaced the radio fuse and the ringing went away. The ringing came back today and the fuse blew.

Are these problems associated with the harness shorting in a few places or is it something else? Any help would be greatly appreciated. I'd like to keep the car and get it functioning as it only has 137k original miles, but I need a reliable car.