I had replaced and rebuilt the head with new intake valves from a machine shop and it had started fine a few times for 2 days even though I didn't drive my v70 t5 manual. I tried to start it today and it died and bogged after I gave it gas with a little exhaust leak to the exhaust manifold. After that I tried starting it and now the belt just spins faster and doesn't catch with the starter it seems. I made sure timing was correct spinning the damper by wrench 4 complete revolutions and stayed in time. I tested the crankshaft position sensor and the camshaft position sensor from a manual and it was all in spec. It seems like not enough compression even though it is in time. I tried to start again and it made a backfire noise. Fuel is getting to the fuel rail because I pressed the Schrader valve on the fuel rail and fuel came out. Car has very little fuel but it wouldn't cause it to spin the belt almost twice as fast. I took spark plug out and grounded it to metal and no spark came out even though it worked the night before with no changes. The spark plugs are not wet either. What could it be!!! Help me!!! If you need a video I can post it

 

If the belts are spinning, then it is cranking.

I would check compression.

 

I am am going to here in a bit. I know it won't have enough just by how fast it is spinning as if no resistance in the motor. You know recommended pressure for this motor? 180lbs?

 

here is a video of it
https://youtu.be/S79Lw8uNFKE

 

Yep, sounds like no compression. But I would check it and then do a cylinder leakage test to see where it's going.

I don't know the exact spec off hand, but you'll know if there's a problem. Probably the 180 range though.

 

I will but I don't have the tool to do a leakage test...or any shop air to shoot down there to see where I can find a noise

 

I have had a couple of episodes of that "volvo lawnmower syndrome" where the engine spun over with no compression, but there was nothing really wrong with it. I would never have believed it if I hadn't experienced it. Just google it, no sense in my typing it.

 

If it has no compression, something is wrong with it...

 

i checked the compression and there is still nothing. RobertDIY said it might be the "lawnmower syndrome" which states the fuel in the cylinders walls basically thinned out the oil on the piston rings. I put a couple teaspoons of oil in each cylinder via the spark plug holes and let the plugs dry since they were wet of fuel and I still have no compression. I know piston rings are good, head was done at machine shop with new valve seats and all seals. Why wouldn't I be getting any compression???

 

That's what a cylinder leakage test is for.

 

I know that but I don't have an air compressor to use the gauges. Another homemade way to check possibly?

 

Nope, not that I know of.

 

Common issue.

Put a small amount of oil into each cylinders than put everything back together and start it again.

 

what do you mean put everything back together?
just the spark plugs and the wires or take the head back off and put oil in and then back together?

i had tried putting oil in the cylinders through the spark plug holes and starting and letting the spark plugs dry from fuel but still nothing and same issue spinning b lets fast with no resistance/compression.

 

Plugs out, small amount of oil in, plugs in, and try to start it immediately.

 

for the T5s compression PSI should be in the 150 to 180 range. Essentially the "lawnmower syndrome" fix is the same as doing a wet compression test - so its no extra effort to pop the gauge on. Normally the test is done on a warm engine to give the piston and rings a chance to expand so don't fret if you are a few points low.