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[tomstin]

The E engines have two sensors on the flywheel. One measures engine speed the other is the crank position. They connect to the wiring harness at the back of the valve cover. Have you checked those...

[tomstin]

Check the fuel pressure regulator at the front of the fuel rail. They can go bad and suck fuel into the intake through the vacuum line....

[tomstin]

I've been thinking about this since I first read it yesterday. First, slow down a bit. You made a lot of changes. I would charge the battery versus new one at this point. I multi-meter will be a good...

[tomstin]

Idle issues are typically vacuum leaks which these engines are very sensitive to. Also make sure the throttle position switch is working correctly. Check the fuel pressure as the fuel pressure regulator...