Car Dies

[gabedrummin]

So vacuum test shows 21 Hg of vacuum , needle is not moving even when revving the engine needle dose not move .

[blue62]

Originally Posted by gabedrummin

So vacuum test shows 21 Hg of vacuum , needle is not moving even when revving the engine needle dose not move .

Your pulling good vacuum so it does not look like you have any vacuum issues.
Steady needle is good
When you do a snap throttle test the needle should drop to near zero then rebound a little above your idle vacuum then settle at idle vacuum.

Here is a site that you can go to and read up on vacuum testing.
It will be better that a back and forth here on the forum.

what-when-how.com/automobile/engine-vacuum-test

That article should help you out some.
sounds like your valve train is ok but do further vacuum tests (described in the article) to prove that out.
A compression test would remove any doubt.

If it is not a mechanical issue (valve train) I would start looking at fueling.
Fuel pressure and volume tests and also the injectors for leaks.

keep us in the loop

[gabedrummin]

Compression test shows cylinder 4,5,6 at 150 psi and 1,160 2 ,155 3 ,150 I used two different gauges and still got a difference of about 10 psi from bank 1 to 2 I also ran the car with cylinder 4 coil unplugged and it still backfire . Very confusing results . Bank one plugs looked black color where as bank 2 the insulators are cleaner .

[blue62]

Originally Posted by gabedrummin

Compression test shows cylinder 4,5,6 at 150 psi and 1,160 2 ,155 3 ,150 I used two different gauges and still got a difference of about 10 psi from bank 1 to 2 I also ran the car with cylinder 4 coil unplugged and it still backfire . Very confusing results . Bank one plugs looked black color where as bank 2 the insulators are cleaner .

So your vacuum test is good.
10 psi difference as the greatest spread is ok.
So I think you valve train is good.
Blows my valve leaking theory all to hell thou.

Are all three plugs from bank 1 blackish???
Blackish plugs are either oil fouled or very rich fuel/air mixture.
Or not firing every time.
So you have to figure out if they look oil fouled or not burning well because of a to rich mixture.

What kind of fuel mileage do you get.????

I would get a spark tester the kind you put between the coil pack and the spark plug so you can test current to the plugs on bank 1

there is a chance your coil packs are not getting energized.
If so that would be a wiring issue.
If that checks out ok then I would look at the injectors.