Have 2018 4010 Mule. Removed engine and replaced crankshaft and bearing. Reinstalled engine and it started up fine but the DFI light stays on and it only runs on front cylinder. It will not accelerate. Checked for DFI codes but found none. Double checked all the electrical connections. Checked rear cylinder for fuel, fire, and compression. All is good. I did notice the firing stops on the rear cylinder as soon as the engine starts up and runs on the front cylinder. Any idea what I should look for next?