I have a 1994 chevy cavalier that won't start. It turns over but wont start.

[bsmallwood2010]

Replaced MAP and O2 sensors. ? One day i went out to start my car, but it would not start. It turns over and tries to start when i hold the throttle wide open, but it won't go. I had just filled up with gas. I replaced the o2 and map sensors already, but didnt fix the problem. Any other ideas of what it might be? Maybe egr valve? Thanks

[neighborhood guy06]

First things first!!! Do you have spark??? Do you have fuel pressure??? You need to know these things first before throwing money at the problem. The car may have started even if all the components you have already changed were faulty. Check for spark by taking out spark plug and seeing if it fires when you turn the engine over. If it does check fuel flow. You may have a clogged filter, bad fuel, bad fuel pump relay or bad fuel pump. make sure you have power to the pump before replacing it. Good luck!!!

[ryaniscool1212]

check your spark plugs and spark plug wires. Any lack of connection there would cause the engine to turn over, but not fire. Also ensure that your distributor is connected to your coil.