Runs on ether-only

[Martin U]

Here is my situation. After having electrical problems fixed, starter wiring ect. I followed all the info I could find about testing modules and things I ended up swapping my original ecm, coils and module back in. I have spark, fuel pressure at the rail, and injector pulse at #1 injector(noid light). I am concerned about the fuel pressure, It keeps on priming the rail almost every time after checking something, so it pumps up to over 80lbs is this OK.
It was backingfiring so I rechecked cam sensor. I have been using a shot of ether just to kick it. It will fire up and use up the fuel and die. I rechecked with noid light and ether and when it runs the light flashes faster as it should.
I am getting concerned about some of this cranking and firing for a short time.
This is a brand new engine and I am VERY worried about wiping the cam. I have not let it idle ,but I also cannot keep it running. The plug I checked was not wet with fuel, and I cannot smell any. When it does fire it sound great!!
There are very few old parts in this, rods, crank block.
Injectors are new Maybe run 15 minutes before teardown. Fresh gas.
I did try running the accufab adjustment screw up and down. It only increased my static press. at the rail. So now I also lost my orginal setting on that. Any ideas on the number of turns to start??
I do have all the goodies in place, and I am very close right now. But I know I must not be getting the fuel INTO the cyl. How do I check ??

Mart

 

[Martin U]

Anyone?

 

[Jerryl]

Weird issue as it seems you have FP, power at the injectors, compression and spark.

If you take an old spare injector, place the tip in a bottle, connect the wires and crank it, does it squirt?

 

[Martin U]

I was trying to figger' out a way to do that. I will try your idea tomorrow.
Thanks for responding. I was almost to the point of pulling the whole rail and cranking. At least I could see just how much they spray
I did feed it tonight with a can of ether, it ran right up as long as I kept sprayin.
Should I worry about the cam with all this cranking?
Marty

 

[Jerryl]

.... I was almost to the point of pulling the whole rail and cranking. .......... I did feed it tonight with a can of ether, it ran right up as long as I kept sprayin................. Should I worry about the cam with all this cranking?

Regarding the cam ....... Technically speaking, yes. (At least, I would with a fresh motor, cam and lifters) Better wait for the experts to chime in. There are several opinions on this.

PS
I am sure you have a brand new fuel filter right?
You can get pressure but not enough flow at idle with a really, REALLY bad filter.

I think you may find the problem elsewhere.
Did you change ANYTHING else and did it run before the build?
Cam, crank sensor ........... interesting issue. Frustrating I am sure! :frown: