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thanks for the tip on the fuel pump. I will give it a try. I am sitill not sure if the regulator is supposed to hold full pressure once the fuel pump is turned off?
does anyone know ?

I was able to get a new regulator, It is insalled, that is the one that i still have questions about. should it hold the 40 + pressure when the ignition is off? I am getting leakage of pressure on the return and supply side. I ordered a check valve to put on the supply side, and will install it soon ...

I am measuring the pressure at the cold start injector. I have replaced all of the hoses in the lines and to the injectors. Earlier this year I hasd stripped off the plenum and intake tubes , and removed all of the injectors. I tested each for a good spray pattern while doing so, I put each of the ...

thanks for the reply, should i have operating fuel pressure remaining after power is shut off?

I've been trying to get my 78 530 back on the road. I have solved most of the elecrical problems with some wise advice from this forum. Now on to the fuel side. My previous fuel pressure regulator would come up to 32 psi when at idle but drop all of the pressure almost immed. when I turn the car off ...

tis sounds a lot like the problem I was having with my 530i. the thread topic was ecu problems , posted a couple of weeks ago. Like you have been told, check out the wiring harness for the ecu and all of the sensors. if you have a good dual relay and all is well with your wiring harness, check pin ...

no I found the broken distributor wire quite a while ago. It was probably the original reason of the car not running, but rather than being the methodical reasoning person which I sometimes can be, I jumped in and started with other things that had given me problems in the past. ]
It was after I had ...

SUCCESS IT RUNS. First a big thank you for all of the input on this problem. Eventually it sank in to my head and I found the problem. I got another ecu on monday and plugged it in. Same issue as before: good fuel pressure. Spark to the cylinders, but no indication on the Noid light plugged into the ...

I believe the interior door rubber molding is glued to the door. It would just be a matter of removing the old rubber and using the proper adhesive to fix the new one in place

i just put in a new dual relay , but the problem remains. no injector pulse. with everything that i have done to date, and checked and rechecked, can the problem be anything other than a bad ecm?

looks like another misdiagnosis. after further testing, the dual relay seems good. my dvom was low battery and couldn't test the diodes. with new battery in the dvom all is well.

so rechecking the wiring harness from the ecu. All wiring is good.
Now I am back to my original question. there is ...

went back to the drawing board and may have found the problem in the dual relay. more testing after getting a new relay.
I did a google search for the bosch part # which was 0 332 514 103 and didn't have any success. I found a relay # 0 332 514 120 on fleabay which claims to be compatible. anyone ...

i just ran a voltage drop test on all of the ground wires in the ecm wiring harness and the main ground on the top of the intake manifold. I connected my $5 harbor freight voltmeter directly to the battery terminals, then with the positive still connected to the battery connected my negative vom ...

with the ecm harness disconnected, there is a pulse at pin 1 from the coil. I did connect noid ligts on injector plugs for cylinder 1 and 6, but no pulse there. I have tested all of the ground wires for continuity, and cleaned the ends where they bolt to the upper intake manifold. I haven't done a ...

gave it another look today. from a tech manual for vw l jetronic, it said :with key on pins 88b and 88z of the dual relay should be hot and I read 12 volts on each. then back to the ecm harness I got 12v on pin 10 which is for the main relay and pins 14,15,30,31,32, and 33 which are the injectors ...