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Unless I am missing something under the car this one has single in tank pump, no main fuel pump located under the drivers seat area.
Correct
If I pull either fuse F1 or F11 the in tank pump does not go through the approximate 2 second pre prime routine with key in position 2.
Right. F1 and F11 are in series (F1 feeds F11, which feeds the Tank pump and O2 sensor heater). The jumper I described takes battery voltage from the hot side of Fuse 1 and applies it to the "Load" side of fuse 11 (pump and O2 sensor heater).
I thought the lambda sensor had been replaced in this model with the RSR.
No, they're entirely separate. The Regina Lambda/O2 sensor is unique and cannot be replaced with a conventional "Bosch" type. The RSR is a relay that (on your car) just feeds +12 to the injectors (ECU controls the ground side).
"Any thoughts? Does the same jumpering routine apply here?"
Yes, if you mean the +12V jumpering described in my previous post.
Your symptoms sound more like a fuel pressure/supply problem, but I thought some info about the Start/Run operation might be useful here anyhow. What follows is a canned post that applies to the Regina FI. And Bosch LH 2.4 too, but with different wire colors on the 240.
The (White) Fuel Injection relay is actually two (2) relays under one cover:
a) The "System" relay is energized when key is turned on, and sends +12V out on the blue-yellow wire (terminal 87/1) to prepare the FI system for starting and running.
b) The "Fuel" relay also gets +12V to its coil (terminal 85) from System relay 87/1. Fuel relay Coil ground (86/2) is controlled by ECU (pin 20) yellow-black wire (described in the sequence below the photo).
Photo below shows FI relay with white cover off (System relay above, Fuel relay below). Note the piece of tubing holding Fuel relay armature down/closed for testing.
CAUTION: Pump should run as soon as the relay is put into its socket. Turning the Key on will energize the System relay. Motor should then start when cranked, if ignition is OK.
Start-Run Sequence (Rex-Regina and Bosch)
1) During starter cranking, the Crank Position Sensor sends timing pulses to Ignition Control Unit (ICU)
2-a) The ICU propagates these timing pulses to the Power Stage (aka Ignition Amplifier) to initiate spark at the coil.
2-b) At the same time, the ICU also propagates those timing pulses to the FI ECU, to allow FI operation (no ICU pulses means no FI operation).
3-a) The FI System relay (previously energized at Key On) powers the AMM, IAC, ECU, RSRelay, and Fuel (pump) relay coil + side.
3-b) When ICU pulses (2b) are received by the FI ECU, it "energizes" the Fuel relay (completes the relay coil ground side) to run the fuel pump.
When this sequence is successful, the motor starts and runs until the Ignition is switched off, which in turn shuts down the FI system.
--
Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.
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