i was driving my car n heard a loud pop, so i stopped opened my hood and my intake manifold is sitting against the firewall. So i pushed it back into the 4 rubber hoses connecting it to the engine and started it and it runs for aboat 1 or 2 seconds then dies. So i thought it jumped time and back fired through the intake manifold so i put a timing belt and tensioner on it and it does the same thing. ive checked timing 4 times and its right on every time. I also did a compression test n each cylinder has about 110 lbs which from what i have read is low. I also did a leak down test n 2 cylinders are losing aboat 40% and the other 2 are less than 10%(which is within specs). Not sure if i bent some valves or not if any idea lmk.thanks