I am going crazy here. I know I bit too much off at one time and should be doing one thing at a time but I tear one thing down, find something else, order more parts & work on other things in the mean time. I replaced the timing belt, some suspension bushings, vacuum hoses and so decided to change the fuel filter while waiting for other parts to arrive. I ordered from one of the sponsors and while they have great prices and seem to respond decently they ship from everywhere three different ways in many shipments and that is also driving me nuts.

I did not touch the wiring at the ECU or the fuel pump relay until I started trouble shooting. I changed the fuel filter after depressurizing by pulling the fuse. The engine did start & run in order to get the fuel pressure out. Also disconnected the negative battery cable. I did disconnect the leads at the fuel pump that is on the same bracket on this model, so it would not be hanging from them. (I know there are two pumps) I also had to do a bunch of taping of those wires. The insulation on the yellow wire was just falling off so I stripped the loom off all the way up to the floor and taped both wires up very well using 3M. When I put the connectors back on & tested by turning the key on, no pump. Tested the leads, no voltage. Ran a wire direct from battery positive to pump + and it runs. Went to the fuel pump relay & tested continuity. The yellow at the pump changed to yellow / red under the back seat and this is continuous to the relay. The negative wire is connected to the frame there and it is good. The relay does not click and in testing I find that the negative control wire on the relay is not grounded. So I tried jumping a ground wire to that pin and shazam, the pumps both came on. Shut the key off & turned it back on, no relay click & no pump. I'm an electrical guy, not electronics wizard, but it appears to me that maybe I have a grounding problem in the ECU or maybe that negative is switched inside there and that has failed. Maybe I knocked a ground loose somewhere? I don't know where to go from here and the only diagram I have is in a Haynes manual, not for an 84. But it does appear to be the same.

Earlier I posted about this engine & found out it is not original. It is a B230F and I have no idea how old. The injection & idle lack of idle speed control makes it look like the 2.2 Jetronic. The ECU is Bosch 0 280 000 510 & has 078 in an oval. There is no second ECU or idle speed control. That looks like it should be the original 84 unit. VIN #2008982, made in Belgium.

I tried to find pin #17 at the ECU for ground and they are not labeled. Counted down one side & then the other to #17 like a pic in the Haynes manual shows an earlier model and that pin was not grounded.

Last resort, I tried grounding the relay pin so the pump came on and cranked the engine for quite a while. No start. I don't know if I cranked long enough. The battery is now on a charger and I am having my first beer.

Sorry about the length. I don't know how else to describe this. Is there anybody here who can tell me what to do next?