Car won't start. Fuel injectors quit firing while cranking.

[deabionni]

UPDATE!!!

The car still hasn't started as of yet. My symptom now is, when cranking the engine, the injectors pulse twice then stop; indicating a loss (or no) Igf signal.

In the past two months, I've: replaced the igniter, repaired the engine wire harness, and also replaced the ECU with another known working ECU. At this point, one would think that this would eliminate all possibilities of loss if Igf signal; yet I still have the same symptoms. When cranking the engine, the injectors pulse twice then quit.

My engine codes are: code 22, and code 14.

Code 22 makes no sense, as I have a known working spare ECU temp sensor; and I plugged that in, and still get the same code. Since I rewired the harness myself, I know the wiring between the ECU temp sensor and the ECU are good. Guess I'll have to test the wiring just to be sure.

Code 14 once again points to loss of IGf signal, so I'm at my wits end on this one. Other than the igniter, wiring harness, and ECU, is there anything else that could prevent a loss of Igf?

 

[bigboostinmk3]

that is the same issue i am having with my 89 mk3. I bought the car used 2 years ago and someone retard went through it. They cut the cat off and had the firing order messed up. I got it to run but barely ( sputters and stalls ) I have tried numerous things on here. I replaced plugs, fuel filter injectors rail and FPR, fuel pump, swapped out ECU like you have. People have said my afm and tps was bad I swapped those out with good ones still same issue. I checked injectors with noid light and it is having the same problem eregular pulse. The only I found is that my CPS is reading to high on the resistance test. 260 ohm instead of 160 or whatever. I dont think that would cause the injectors to pulse wierd. I truthfully dont know where to go with this car now besides wiring issues maybe. Has anyone had these wierd pulse problems tooo????? Does your security light stay on when cranking???? The only code i get is 51 Ac switch

 

[deabionni]

^^^ No security light, and everything on the dash lights up as it should. The tach jumps while cranking, and I can hear the fuel pump (Walbro) working as it should.

Everything seems to be working as expected, but for some reason the ECU refuses to inject fuel into the engine.

 

[deabionni]

Anybody????

 

[jetjock]

Same old story: code 14 = no injection. You have to fix that. Check for spark first.

Code 22 should be easy. Check voltage between THW and E2 at the ECU.

 

[deabionni]

THE CAR RUNS!!!

The connector going to the coil had two lose wires that I didn't notice before. I replaced that connector, and it fired right up.

All I have now is just the code 22 & a code 31 to deal with, and all of the problems are solved. Thanks to everyone who chimed in, and helped out.