1976 VW Super Beetle fuel issue

[mtsipe]

I recently got my super beetle's 1600 dp engine rebuilt. I got the engine in and everything connected. *note* it is Fuel Injected.

I went to start it and the engine cranks but does not turn over. I sprayed starter fluid in the intake and the engine fired up briefly. I need to work out the fuel delivery.

Can anyone assist me as I am fairly new to the air cooled engine? Do I start with testing the fuel pump and then go from there? Do I completely ditch the fuel injection and go with carbs?

I am not quite ready to take it to a shop yet since it is soooo close to running under my own handywork.

It was a running car shortly before I purchased it. The previous owner let it sit too long and the engine seized up.

Thanks

[VW_Jimbo]

Lets see your handy work. Post up some pictures. Maybe with that, the collective, WE, can direct you back to a running vehicle!
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Jimbo

There is never enough time to do it right the first time, but all the time necessary the second time!

[FeelthySanchez]

[zoti]

There are a lot of things to inspect.

Fuel pump, double relay, injectors. Are they all functioning?

First start with the fuel pump. Is it turning when you turn the key to start position (engine cranking)? It only start turning at this position and when the engine is running.

If that is good, pull an injector out, is it spraying fuel when you crank the engine? Check for power to the injectors.

That’s where I would start.

If your fuel pump is not running (going to say this is probably your issue) then check for power to the pump. The wires corrode and connections go bad.

[zoti]

Also, if it was sitting and you have power to the pump, it could be that it is seized. I would connect two hoses to each side of the pump, sink them in fuel then connect the pump to 12v power. Switch the polarity until the pump un-siezes. It sometimes works.

[sjbartnik]

You seem to have tracked it to a fuel issue, so at least make sure the fuel pump is working. It can be hard to hear it on an L-Jet system since it only runs when the starter is operating.

The fuel pump is powered via the double relay when the key is turned to START. There is a trigger wire from terminal 50 on the solenoid to the double relay which provides that signal to close the relay and power the pump.

However you can trick the system into thinking the engine is running and powering the pump by turning the key ON and then manually moving the flap inside the air flow meter. When you move the flap off the rest position you should hear a click from the double relay and then you should hear the fuel pump run. If not, you know where to start troubleshooting.

Yes if it has been sitting for a long time, the old fuel may have turned to varnish and you may have to do some remedial work there.
_________________
1965 Volkswagen 1500 Variant S
2000 Kawasaki W650

[mtsipe]

[busdaddy]

If the pump was glued shut the injectors must be in a similar state, consider sending them out for a professional cleaning. If you don't have a Bosch authorized diesel injection shop in your town there are a couple of mail order shops that offer quick turn around.
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[zoti]

Pull an injector out and put it in a zip lock bag. Have someone crank the engine and see if it squirts. Test all of them. Go from there.

[mtsipe]

[zoti]

[mtsipe]

So I pulled out two injectors (one new and one old) and tested them independently. There was no fuel spraying either with the key in the on position or cranking on both injectors. This leads me to believe that there is an electrical issue getting the signal to the injectors to open.

I will continue to test the cold start injector and the other two injectors the next chance I get.

[zoti]

[busdaddy]

[Dwayne1m]

[zoti]

If you have fuel pressure but still nothing out of the injectors it's time to look at the ECU and electronics (more like electrics) of the car.

There's also a resistor pack (if I remember correctly it's in the engineerings bay on the passenger side wall) that the injectors connect to. Check the connection there.

[busdaddy]

[mtsipe]

Update:

Here is the video I made up. It was too big to post here so follow the link.

https://sipeadelic.wixsite.com/cabby-mk1/1976-vw-super-beetle-video

[zoti]

First, get the correct fuel filter installed. I don't even know what that thing you have there is.

https://www.jbugs.com/product/133133511.html

You are not getting power to the injector which is obvious. When was the last time this car ran?

I read your first post again and I understand you installed everything back. My bet is you either missed something or a ground is not connected correctly.

[zoti]

This one is a FI diagram for a bus but I think it is almost identical.

No power to injectors is either disconnected at resistor pack or no signal from ECU.

https://www.thesamba.com/vw/forum/viewtopic.php?p=7107458