914 Fuel Injection, Need an L-Jet Guru!! Options

[Cjllong]

I have a 75 914 with a 2.0 motor. It originally had a 1.8L, but I acquired a 2.0 from a wrecked 73 914. When the 2.0 was rebuilt and installed, the mechanic installed the 1.8L fuel injection system and told me it was superior to the 2.0L fuel injection system. I drove the car for 2 years and never had a problem. All of the sudden, the car wouldn't start. I took it to a local German auto mechanic, (The guy who originally did the conversion left town), and he said he would fix it. Well.... A new fuel pump, plugs, other stuff, and the big one.. a new computer, the darn thing still has the same symptoms. It simply dumps fuel into the valves when starting, causing it to flood almost instantly. He checked the fuel pressure regulator and it seems to be fine. He's telling me that the computer is holding the injectors open too long, causing excessive fuel to flood the motor. $1300.00 later, he says he'll do the rest of the diagnosis for free. I think I payed for his education of the 914 fuel injection system, and I don't think he learned anything. I originaly posted this problem on Pelican Parts and they directed me here and told me to look for Clay Perrine. If your out there, please help me! I'm desperate!

Chris

[newto914s]

I had the same problem, wasted many hours testing and the components all checked out good.

Turned out to be the wiring harness. Specifically the wire to the airflow sensor.

Good luck

Stephen

If the wire to the air flow sensor is disconnected the system will go to full rich. Was a great supplimentary choke this past winter on my 78 Westy running on 3 cylinders, but it could be causing the flooding. Another simple check of the air-flow meter is to put the key to the on position, don't start it. You should hear the fuel pump prime for a second then shut off. Then(still ign. on) reach into the airflow meter and push the air flap. As the flap is ingaged you should hear ether the Fuel pump start up again, or the injectors pulse. I can't remember which now, but you should here something when that flap it moved and the ignition is on. Lastly make sure the 3 ground wires under the passenger side intake runners are attached.
After the steep(and expensive) learning curve that is D-jet. I was really impressed with the simplisity and effectiveness of the L-jet system. It's the Air flow sensor or something is disconnected, that's it.
Good luck and find a new mechanic

[ClayPerrine]

I had the same problem, wasted many hours testing and the components all checked out good.

Turned out to be the wiring harness. Specifically the wire to the airflow sensor.

Good luck

Stephen

If the wire to the air flow sensor is disconnected the system will go to full rich. Was a great supplimentary choke this past winter on my 78 Westy running on 3 cylinders, but it could be causing the flooding. Another simple check of the air-flow meter is to put the key to the on position, don't start it. You should hear the fuel pump prime for a second then shut off. Then(still ign. on) reach into the airflow meter and push the air flap. As the flap is ingaged you should hear ether the Fuel pump start up again, or the injectors pulse. I can't remember which now, but you should here something when that flap it moved and the ignition is on. Lastly make sure the 3 ground wires under the passenger side intake runners are attached.
After the steep(and expensive) learning curve that is D-jet. I was really impressed with the simplisity and effectiveness of the L-jet system. It's the Air flow sensor or something is disconnected, that's it.
Good luck and find a new mechanic

This has a slightly incorrect statement in it. On a 914 (not a Westy) the fuel pump will not run when the key is turned on. It only has two conditions where it runs.

1. When the key is on and the engine is running with enough airflow to open the air flow meter flap.

2. When the key is in the start position the fuel pump runs. Check this by disconnecting the yellow wire from the starter and turning the key to the start position.

[Cap'n Krusty]

I had the same problem, wasted many hours testing and the components all checked out good.

Turned out to be the wiring harness. Specifically the wire to the airflow sensor.

Good luck

Stephen

If the wire to the air flow sensor is disconnected the system will go to full rich. Was a great supplimentary choke this past winter on my 78 Westy running on 3 cylinders, but it could be causing the flooding. Another simple check of the air-flow meter is to put the key to the on position, don't start it. You should hear the fuel pump prime for a second then shut off. Then(still ign. on) reach into the airflow meter and push the air flap. As the flap is ingaged you should hear ether the Fuel pump start up again, or the injectors pulse. I can't remember which now, but you should here something when that flap it moved and the ignition is on. Lastly make sure the 3 ground wires under the passenger side intake runners are attached.
After the steep(and expensive) learning curve that is D-jet. I was really impressed with the simplisity and effectiveness of the L-jet system. It's the Air flow sensor or something is disconnected, that's it.
Good luck and find a new mechanic

This has a slightly incorrect statement in it. On a 914 (not a Westy) the fuel pump will not run when the key is turned on. It only has two conditions where it runs.

1. When the key is on and the engine is running with enough airflow to open the air flow meter flap.

2. When the key is in the start position the fuel pump runs. Check this by disconnecting the yellow wire from the starter and turning the key to the start position.

It doesn't "prime" on a VW, either. The systems are, for all intents and purposes, identical. The Cap'n