Yes engine is fuel injected. Yes the mechanic drove with me for 30 or so miles of monitoring the psi gauge on the valve under the inside engine compartment. It maintained 30+ psi for 2 days straight (test runs of maybe 40 miles) after the change of the 2 new pumps, filter and regulator. Was driving great today for about 8 miles then a sudden quit in engine. Now it wont even start after an hour or so of sitting. Before the new parts were installed once i let it sit after it quit it would start back up. This stinks!!