erubin

1995 Cavalier 2.3L DOHC.
Car cranks but does not start. Not even a hint of catching even with starter fluid sprayed into the air intake. Plugs are good and not flooded. Tested all 4 coil outputs and they all spark. Fuel pump goes on (can hear it) and in any case i smell fuel and even with starter fluid not even a hint of catching. BTW, I replaced the chain, tensioner and guides 4 months ago after repairing the cracked head. I think i can rule out the cam and crank position sensors cause i get spark. Engine has compression although weak on cylinder 3. Shouldn't be fuel related either because no hint of catching with starter fluid. BTW, no codes (car is equipped OBDII).

I'm baffled, help, please!!!

Edit: Wasn't sure if spark was too weak so i replaced one coil pack and still the same.

erubin

I wonder if there is a simple way to determine if the t-chain slipped. I have 120-140psi for compression on three of the cylinders so would that be ruled out? I have spark, fuel and compression so what's wrong? thanks

jonsonton

Hmmm, what about the 4th cylinder? Is there any vacuum leaks that you know of?

erubin

The 4th cylinder (actually cylinder #3) is only putting out 60psi compression. The otherv 3 put out between 120-140psi. A vacuum leak has no bearing on compression.