Engine first start attempt., Couple vacuum leaks, Finally adustable idle. Options

[Olympic 914]

Power to the fuse on the relay panel, fuse is good,

Power to pin 30 on the fuel pump relay, When I jump 30 to 87 the fuel pump runs. switched relays again no change.

Something is not triggering the relay

How can I tell if the ECU is getting power?

Checked all the fuses under the dash and all seem good, didn't test them though. but I had cleaned them before. Something else to look at again

Agreed with all of the above.

D-jet runs the pump the following way:
The ECU sees the "key is on" signal from the ignition switch, by way of the relay board and the "power supply" relay on the relay board. (See your relay board diagram from Haynes or Pelican for which is which.) When it sees the power go from "off" to "on", it will ground a wire that connects to one of the pins on the fuel pump relay, closing that relay and sending power from a fuse on the relay board to the pump.

So, you need to make sure that the ECU is seeing power. You need to make sure that the correct fuse on the relay board (I forget which but you can trace the circuit on the diagram or just check both) is good. And you need to make sure that the relay closes and that you get power on the pump wires.

And of course, make sure the pump's ground connection is good....

--DD

[Olympic 914]

In desperation I started unplugging and reconnecting everything and turning the key after each one. when I hit the 3 connector plug at the distributor and turned the key

I heard the fuel pump buzz. turning the key farther and it started. WHEW .

Still running at 3000+ rpm but at least its running.

I just wanted to quit but something kept sucking me back in, my eyes crossed from looking at wiring diagrams.

I don't understand why it was running at all if this was the problem.

somehow just coming here and posting the problems gave me a break and was sort of cathartic.

Well folks back to our regularly scheduled programming of hunting down vacuum leaks.

again thanks Vacca and Dave for jumping in with possible solutions.

[Dave_Darling]

That shouldn't affect the fuel pump. You likely have a flaky wire somewhere, possibly one of the ones that carries power to the ECU.

Perhaps a Bowlsby FI wiring harness is in your future?

--DD

[Olympic 914]

Fixed the vacuum leak on the drivers side intake runners and throttle body gasket. used a thin smear of the black RTV.

So it starts and has an adjustable idle.

Finally.


Also after shutting it down when finished making a few adjustments, again the fuel pump will not buzz. May have been a fluke with the plug at the dizzy. it may be a wiring problem that just shows up when its hot. so I get to trouble shoot that for a while.

Or a new harness (IMG:style_emoticons/default/confused24.gif)

(Addendum) Found that the power relay was intermittently failing. I had been concentrated on the fuel pump relay. By using the fuel pump troubleshooting list found on J Bowlsby's site, I discovered the problem.

That shouldn't affect the fuel pump. You likely have a flaky wire somewhere, possibly one of the ones that carries power to the ECU.

Perhaps a Bowlsby FI wiring harness is in your future?

--DD