Zero compression

[ave22]

I bought a 1995 eagle talon tsi awd turbo 5 speed. I heard it run but it didn't run very well. And I tried starting it again and nothing. I checked the compression with two different gauges and have zeros all across the board. Could I be lucky and the lifters need blead? Why all the sudden would it be zero?

 

[ramsack]

Check physical (cam) timing? If it was sitting for a long time the timing belt could have let go and smashed valves. Sometimes rings stick to the piston over time and can't build compression, but you wouldn't get it to run, then not run, it just wouldn't ever run, period. Lifters (lash adjusters is what they really are) when need bleeding simply don't open the valves. You would still see some movement in a compression tester gauge.

 

[LiquidX]

You would benefit from a leak down test. Lifters only need bled when you remove thecams or the rockers with the cams in place. If you don't, the lash will be off and a potential for piston to valve contact may happen.

If the vehicle sits, the lifters naturally will bleeding out pressure.

to the leak down test and that will narrow your problem area. Perhaps your timing jumped or was off when it was idling bad.

 

[ave22]

It seams like it has compression when its in gear and I try to push it manually it won't move

 

[ramsack]

Quit rotating the engine and check that your cam timing is in line.

 

[BogusSVO]

It seams like it has compression when its in gear and I try to push it manually it won't move

You are forcing the whole drive line like that.

Pull the timing belt cover, and check all timing marks line up.

 

[ave22]

Ok i will check the timing and then do a leak down test. It's just weird it lost compression just trying to start it. You could hear it under a load cranking over then nothing no compression

 

[BogusSVO]

Thats what happens when the time belt fails... :/

 

[badwin57]

When I had that problem it ended up being a bent valve due to a broken timing belt.

 

[MotorHead265]

Sounds to me like your timing is off. Even if your rings were bad or a valve or two wasnt sealing you would still have some compression in at least one cylinder.