Thread: So it starts...Gen III 5.3 Vortec into 51 Chevy

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Lets hear how they sound!

Passenger side is in





But drivers side would have fit perfect, but because of the location of my master cylinder underneath the floor, I can't install the header so I am going to go to the exhaust shop and see if they can't bend it some to clear the M/C

Here is from Sunday:

Good news, got the headers in.
and I got it to start

Now for the bad news
I can get it started with starting fluid and sounds like a beast , but once the fluid is gone, it dies . So I am assuming I have spark since it runs off of the starting fluid.
Also sometimes it will start without any fluid for like half a second after sitting for a little bit.

Troubleshot:
-Can hear fuel pump kick on
-Can also hear injectors spray when the key is on
-MAF is hooked up
-have about 4-5 gallons in the fuel tank
-No trouble codes showing up
-ECM programmed by Wait4Me so I assume VATS is deleted

Also when it is running it doesn't stumble or anything, sounds like it would run really good, then it runs out of starting fluid and dies

Been troubleshooting all day

Oh yeah, had a video of first start up, but for some reason the camera didn't save it, but I'll try and get one when she starts runnin right


And here is what I found out today:

Well for the starting problem, I think I got it now. Since I could hear the injectors, I just assumed they were firing, well this morning, I took them out to watch them and sure enough, nothing came out, but it sounded like it was. So first thing that came to mind was clogged injectors.

So I went and borrowed an injector from the parts store, put it in, and sure enough that injector was firing, and I must have jarred another one free from all the movement, because now another one started going on the other side.

So I had two injectors shooting (new one, and one old one) and the motor wanted to start, just didn't have enough fuel I assume from just two injectors, but it definitely sounded like it wanted to fire, so I think that may be it.

Needless to say, now all 8 injectors are soaking in Seafoam as we speak, and I will probably reinstall them tomorrow morning and see what happens.

Hopefully this is it.....

Ok I just checked pressure to the rail and when its priming its getting like 65 PSI and then after it clicks off its just under 60, probably about 55PSI, but then while cranking its getting about 65PSI to the rails.

I read somewhere that if the injectors get more 60PSI they won't fire. Can anyone verify this by chance?