1992 jetta just quits

run the fault codes and check for problem ECM
There is an electronic component failure in the injector circuit that when over heats , shuts that injector circuit down
try replacing the ECM with a known good unit

Have you figured out if you are loosing spark or fuel pressure when the engine quits ? Could be a relay, coil, fuel pump, or various other electrical components.

1992, PICKUP, in USA? what country , ? cars are not same all over earth. sorry.
engine surges, then stalls. correct.>?

nice testing , rare here, real nice !!!!
spark good as it stalls
so if engine is ok, compression, (seems cat is not melted with 20 " HG)
is flooding or starving for fuel,.
one or the other, you can find that out.
if spark timing was ok, then the belt did not slip. on cam)
leaving only fuel issues.
so DO the magic , WOT, cranking trick this trick (logic in ECU)
cuts the injectors dead, cranked, to unflood all engine with EFI.
do that?
check spark tips, for 3 to 4 hours dead.? be next
2.6L (is 4 cylinder.) is cam belt drive, i never fail to check it first
the fail, at 60k miles, all do. all rubber band engines do.,

if all this is ok, not flooding
one can start engine with test fuel, and even keep it running
even with (hint) fuel pump relay pulled.
if that works, the fueling is wrong.
injectors leaking,? ?
if only one spark tip is wet , soaking in fuel, Injector issues.

when it stalled pull all 4 plugs and look at the tips.
(if cam is timed right) be super super first thing, on this 4 banger.

Change the ignition control module.

SOUND LIKE FUEL PUMP RELAY FAULTY IT SENDS POWER TO ASD OR AUTO SHUT DOWN RELAY AND FUEL PUMP WHICH LOCATED IN THE POWER DISTRIBUTION CENTER UNDER THE HOOD IN THE ENGINE COMPARTMENT.

if there is no power to the fuel pump check relays and fuses....UNDERHOOD FUSE & RELAY PANEL IDENTIFICATION Fig. 2: Underhood Fuse & Relay Panel Identification Courtesy of ISUZU MOTOR CO. Fusible Link Identification ? A - 80 Amp (1991-92 3.1L) ? A - 60 Amp Main-1 ? B - 30 Amp Main-2 ? C - 30 Amp (1993-94) ECM (3.2L) ? D - 30 Amp Condenser Fan (A/T Models) Relay Identification ? 1 - Headlight Relay ? 2 - A/C - Heater Relay ? 3 - Starter Relay ? 4 - A/C Compressor Relay ? 5 - Charge Relay ? 6 - Fuel Pump Relay ? 7 - ECM Relay ? 8 - Wiper Relay Fuse & Circuit Breaker Identification ? 1 - 15 Amp (1991) ECM, Fuel Injection System ? 1 - 15 Amp (1992-94 2.6L) ECM, Fuel Injection System ? 1 - 10 Amp (1992-94 3.1 & 3.2L) Heated Oxygen Sensor, Fuel Injection System ? 2 - 20 Amp (1991-92) Fuel Pump ? 2 - 20 Amp (1993-94 2.6L) Fuel Pump ? 2 - 15 Amp (1993-94 3.2L) Fuel Pump ? 3 - 10 Amp (1991) ? 3 - 15 Amp (1992-94) Turn Signal Lights, Hazard Warning Flasher Lights ? 4 - 10 Amp Horn, Door Locks ? 5 - Not Used (1991 3.1L) ? 5 - 10 Amp Charging System, Charge Warning Light WARNING: Always disconnect battery ground cable before servicing "high- current fuses. It is recommended that "high-current" fuses be replaced by a qualified technician. Page 1 of 2 FUSES & CIRCUIT BREAKERS -1994 Isuzu Rodeo LS? 6 - Not Used (1991) (1992-93 2.6L) ? 6 - 10 Amp (1992-94 3.1L & 3.2L) A/T Interlock System ? 6 - 10 Amp (1994 2.6L) Heated Oxygen Sensor, Fuel Injection System ? 7 - 20 Amp Heater/Air Conditioning Blower Controls ? 8 - 10 Amp Air Conditioner Compressor Controls ? 9 - 10 Amp Right Headlight ? 10 - 10 Amp Left Headlight © 2008 Mitchell Repair Information Co., LLC.

Underhood fuse block swap out relay #7 thats the ECM relay.
Ground Circuits Using a DVOM, touch negative voltmeter lead to a good ground. Touch positive voltmeter lead to each ground terminal. With vehicle running, voltmeter should indicate less than one volt. If reading is greater than one volt, check for open, corrosion and loose connection on ground lead. See ECM GROUND LOCATION table for ECM ground location.
Page 1 of 1 SYSTEM/COMPONENT TESTS - 2.6L EFI -1994 Isuzu Rodeo

If there is no spark, then there is no signal to crankshaft position sensor. If no power to fuel pump, check relay and power to it.

If you are not getting power to either of them.Then igniitn module or ECM is faulty.

First, see if it loses fuel, or spark when it dies.

Check the fuel pumps operational value and, check the fuel pumps fuse and relay. If the fuel pump check out OK, i would then replace the(ecm).

You want to make sure the fuel pump is functional before you replace the ecm. The distributor ha sa on board CMP(camshaft position sensor), that will shut down the spark and fuel pump if it is malfunctioning.

gthr