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 .

[emerygt350]

Since you have a 123 and the MPS really can be out of whack and the engine will still run "ok", I think you should a) check your timing (just to be sure) b) check to see that all injectors are firing c) disconnect the throttle switch to see if anything changes d) start to suspect the computer?

Any chance you didn't connect the trigger point wires correctly to the 123?

[jim-c]

Since you have a 123 and the MPS really can be out of whack and the engine will still run "ok", I think you should a) check your timing (just to be sure) b) check to see that all injectors are firing c) disconnect the throttle switch to see if anything changes d) start to suspect the computer?

Any chance you didn't connect the trigger point wires correctly to the 123?

I just checked the timing with a light. Got 27 total at 3500 rpm.
I installed a second unmolested MPS and it runs the same. It starts good, idles decent, won't rev unless I spray gas down the TB opening.

I double checked the distributor to trigger point harness. Matches the instructions. Usin the two outside terminals with yellow on left side looking into connector.

I disconnected the throttle switch with and there's an improvement . I'm now able to get some revs and hold it at med or high rpm. The throttle switch looks new and I adjusted it with the ohm meter. Should I remove it and take a look inside ?