Injector flow test FAIL ?, Troubleshooting lean condition Options

[jim-c]

Im working on my recent 914 purchase. 2.0L engine. D-Jet ECU . Intially the engine would fire right up and idle smooth at 1000 rpm. Unfortunately it didn’t want to rev above idle. I could quick pump the throttle and get it to rev but it was undrivable.

I have an AFR gauge and it shows dead lean when i try to rev.
I did a flow test on two injectors ( all 4 are new ) . I have 28lbs of FP .
Full throttle and crank for 15 seconds yields 2cc per injector. Supposed to be 7 ish.

Any ideas ?

Nice new harness, MPS holds vacuum and has correct impedance readings.
The balance of sensors check out okay with test procedure. Fuel pump holds 28 lbs steady and pumped a quart of gas within 30 seconds .

[914sgofast2]

Low idle vacuum is likely a timing problem or undiscovered vacuum leak. Also, do you have the correct 123 Distributor that is set up to run with Djet? Not all the 123 Dizzys are compatible with Djet. You could be running on the cold start injector only if the 123 Dizzy is not sending the correct pulse signal to your ECU to fire the injectors.

Low fuel pressure could be a kinked rubber fuel line hose (or metal pipe) somewhere in the fuel system between the tank and the engine; or a faulty fuel pressure regulator that is stuck slightly open and sending a lot of the gas back to the tank.

Failure of fuel pump to run long enough is going to be a wiring (or internal ignition switch failure) or an ECU problem.