Hello Austin I have a problem my friend has a Chevy S10 with a 2.2L engine, Auto Tran, the engine wont start, it turn over but wont fire, but when i open the Throttle body all the way open than try and crank it, it will back fire out the throttle body, i check the Fuel Pump its getting fuel, check the spark it getting that, what would cuz it to back fire out the Throttle body, the Igintion timing or Timing chain,
thank you for your time hope you can help
Otis
Yo Otis
If you have backfire/exhaust coming back up through the throttle body you have:
1. ignition timing off timing chain problem or distributor set wrong
2. problem in the cylinder heads valve bent head gasket issue etc. etc.
3. check compression to verify
4. firing order is off double check the spark plug wire installation, you might have them crossed or not on the rights plugs or distributor end caps.
Blessings,
Austin Davis