The sputtering out points to a fuel issue so we need to pursue this a little more.
Let's start with checking the fuel pressure and make sure you have proper pressure. Here is a guide that will help with this:
If the pressure is ok then we need to go after the spark that may not be there. When you pulled the plug did you hold it against the block and crank the engine? If so, you need to see a strong blue spark. If you did not see that then we have an ignition issue. So let's make sure we double check this because if we are not sure it will send us down the wrong path.
As for not relearning the crank, that is ok for now. It should not prevent the start. It may cause some running issues but not a no start.
Lastly if we prove out that we have fuel and spark or weak spark, we need to change the plugs as they may fouled which will cause a no start as well. So if there was a crankshaft position sensor issue and you fixed it, then we may have fouled plugs now. When the engine cranks with no spark but has fuel, it fouls the plugs and causes them to have a weak or no spark.
Sunday, January 31st, 2021 AT 3:17 PM