Car not starting after engine install (NEW video added)
 

Porsche 911 No Start - YouTube

I reinstalled the engine and trans. Turned it by hand a couple times around to get the oil moving. I then turned the key to accessory for about 20 seconds to get the fuel system primed. But as can be seen in the video, the car isn't starting. Hopefully someone can hear something in the video that will shed some light on my problem. How long should it take for fuel to get through the lines, pump, accumulator, filter, CIS, etc. before the car should start? Thanks guys.

CDI sounds good, fuel pump sounds good, starter sounds good. Back to basics though, check one of the spark plugs for a spark. (Pull a lead, plug in a spare spark plug and lay it down on a metal engine surface or body, just make sure its well earthed and you can see the spark gap, crank and look for spark.) Next check for fuel, I understand that you can see down the throttle body and see a cold start squirt fuel on the CIS engine. At least pull a fuel hose somewhere after the fuel pump and check its pumping fuel into a jam jar or something.

CIS needs proper fuel pressure. Got a gauge?

On my 82 after putting the engine back in it took maybe a few moments of cranking and she fired right up.

It doesn't really sound like it's trying, not even sputtering or spurting. Does it smell like gas? If it's flooding or not starting or firing it'll smell badly of gas generally since it's CIS and it'd be spraying constantly.

I know when I put my engine back in it didn't start at first and I realized I had my WUR unplugged by accident along with forgetting to plug in part of the harness. She fired right up after that.

But agreed, check your basics. Spark, etc then fuel.

+1 on Back to Basics. Check spark first and if good, move to fuel delivery.

I see you have a 74 with a 83 engine. Unless you moved the fuel pump, it is a long way from the tank and above the level of the tank outlet so even though the pump will run with the ignition on, it may not be pumping fuel at pressure to the engine. Prime the fuel system by gently lifting the plunger in the intake for a few seconds until you hear the injectors squeal, then try to start the car.

I do this with the key in the ignition, and fuel pump running, correct? There is no smell of gas whatsoever so far, so I am wondering if the fuel is even to the CIS yet. I also still have the jacked up to a slight nose down incline, so the fuel traveling through the lines is working against gravity as well, if that makes a difference. I will lift the plunger and see what that does.

Is there any possibility that you connected the fuel lines incorrectly? I know you had some electrical connection issues.

I didn't really have an electrical issue, just didn't know if a wiring harness was suppose to be attached or not. It seems there was conflicting opinions here on it. But as far as fuel, there's only three hoses: one to the accumulator, one to the fuel filter, and one from the tank, right? And it's impossible to plug one into the other, so far as I could tell. That being said, there is absolutely NO gas smell whatsoever in the engine area. I don't think fuel is reaching the motor.

Porsche 911 not getting fuel - YouTube
So here's a new video of me trying to prime the CIS. It seems like it's still not getting any fuel though. I can hear the whine change pitch every once in a while, but I don't smell any gas and it's just as unresponsive when trying to start. This is getting pretty frustrating...

spray a few spurts of carb cleaner into the throttle body. If it starts/stumbles, you know its a fuel problem. Takes 2 seconds to check.

Ossiblue has a good point. Where is your fuel pump? If it is in the original location for a 74, in the engine compartment instead of next to the fuel tank as on the 83, you need to prime the pump before it will supply fuel to the engine. This may require either pressure, as compressed air, applied to the fuel filler pipe to push fuel to the pump, or vacuum at the pump end to bring fuel to the engine compartment. That was Ossie's point if I dare speak for the great sage.

Pull an injector, they are held in on a rubber O ring, key on, lift the airflow sensor and you should get spray.
Bruce

Fuel pump is on the driver's side, right by the rear wheel well. The first thing I noticed when I turned the key for the first time was the sound of a "dry" fluid pump, like when you turn on a water pump outside of water. My limited knowledge still tells me there is no fuel getting to the pump; and if the 911 fuel pump is like any other fluid pump, having it run dry is not a good thing. I am interested in the compressed air in the fuel filler pipe. I just stick my compressor hose down it and let 'er rip?

Sure that's the fuel pump? CIS pumps are usually up front under the gas tank.

+1 on the squirt of ether, no cough could be spark.

Well, something underneath the driver's side rear wheel well is making a hell of a racket when I turn the key. I filmed it in the first video. If it's not the fuel pump on a 74, than I don't know where the fuel pump is.

Odd place for it.....never worked on a 74 and you never know what previous owners will do.

Have you tried the ether, pulled an injector and/or checked for spark?

It sounds basic, but do you have enough fuel in the tank? Especially if the rear is still in the air, any fuel in the tank may be below the pick up.

I know this is too simple, but when I re-installed the engine back in my Targa, I fogot to attach a bunch of ground wires in the engine compertment. You may want to check this out.

I have pushed fuel through the fuel lines to the pump using a rag tightly wound around the compressed air line to make a seal against the fuel filler pipe. Loosen a fuel fitting next to the fuel pump or beyond it and push fuel through in this way until you detect fuel at the pump. Then tighten everything up and try again. Be careful to catch the fuel so you don't risk a fire. Since you hear the pump struggling it is probably dry. The pump is cooled and lubricated by the fuel flowing through it.

It's funny you ask that, cause I thought the car still being on the jack stands--at an angle--was affecting the fuel moving up through the lines. There's not a lot of gas in it, maybe 6 gallons, but certainly enough I thought to get the car started. If that's the problem I will feel like a moron.