Hi Neil.   I did a little more checking.    It seems that each FI plug does have a constant B+ on one side.   For me it was showing 11.75 Volts   As I was doing this testing with the pump relay in place, I noticed that the B+ was only present when the pump was running and when it disappeared and the pump turned off, this is when the injector sprayed.     I'm not sure what that means and I will have to do some more reading but as the signal seemed identical at all 4 plugs, I'm pretty sure it means that the 3 injectors that are not spraying are doing so because of a fault within them each.      Steve

On Dec 7, 2013, at 3:02 PM, Steve Cotsford wrote:

> Thanks Neil for this additional info.   This means that the injector switching is done on the negative side and nothing will happen to the injectors if the constant B+ is missing.     
> Yes, the good injector did spray each and every time I moved the rotor.     I even switched the plug of that injector with the one right next to it.  Only the same injector sprayed, thus confirming that the other one could not.      I might even switch that 1 good injector over to the other bank and see if those plugs make it work.   If each plug fires the good injector, this will tell me that the r/h injectors are faulty too and that the ECU and/or wiring is doing its job.     Steve
> 
> On Dec 7, 2013, at 2:47 PM, Neil N wrote:
> 
>> Ign. on, each FI plug should have a constant B+ on one side. There is
>> a B+ junction in the black junction box. IIRC, this supplies B+ to
>> FI's. The test should be shown in Bentley for this. Also, check
>> continuity between each FI plug negative wire and ECU plug. The FI's
>> are activated by a supplied negative ground from the ECU. I see this
>> as ECU 12.
>> 
>> I find it hard to believe that 3 injectors are faulty. But as you say,
>> the engine has sat some time unused.
>> 
>> Is the known good injector spraying each and every time?
>> 
>> 
>> On 12/7/13, Steve Cotsford <cotsford@aol.com> wrote:
>> 
>>> It seems I have just 1 injector out of the 4 that is pulsing fuel, on l/h
>>> bank, so I have 3 injectors that are not injecting so to speak.    No wonder
>>> I was not getting far.
>>> Now I have to make those 3 injectors work :-(        Is there an easy way of
>>> doing that?       I have no idea when last these injectors worked.
>>> Certainly they have been sitting idle for at least 6 months in my
>>> possession.    38 psi did not make it happen :-)
>> 
>> 
>> 
>> -- 
>> Neil n
>> 
>> Blog: tubaneil.blogspot.ca
>> 
>> '88 Westy http://tinyurl.com/c8rlw6p
>> 
>> '81 VanaJetta 2.0 "Jaco"  http://tubaneil.googlepages.com/
>> 
>> Vanagon VAG *Gas* inline-VR Engine Swap Group:
>> 
>> http://tinyurl.com/d7gd5ej