Strange engine miss

[ajtbussen]

My 1990 range rover has a miss between 2000 and 2500 rpms under high electrical load. Items already checked are:
All engine bay grounds.
New plugs, wires, cap, rotor
Distributor
Timing
Coil
Alternator bench test OK
Injectors test good from ecu
Swapped ecu
Battery good
Fuel pressure good. Used PT's new pressure gage manifold for early engines. 32 psi.

I'm going to check the ignition switch and swap ignition amplifier.
Anyone have any other ideas?

 

[Flyfish]

Hey bubba,

I have an extra dizzy & amp modules if you need. I know you rebuilt yours, but it's a quick test.

Just for fun, you do a compression test?? You may also want to run a tiny drill bit or paperclip into the little nipple on plenum above throttle body, just to make sure it's clear. It's the one going to vac advance.

Let me know if I can help.

 

[discostew]

Cam shaft ?