Hey guys, need some help. I replaced the o-ring's on my plastic fuel lines w/ Viton replacements and completely replaced the short plastic fuel line from the pre-filter to the heat exchanger. I trying to start the car and purge the air from the system in the process.

So far, made sure the lines are back on snug and clipped into place. I have been cranking the engine (while being jumped off of my Neon not to kill my battery) for approx. 30-45 second intervals, 2x so far. My GF can see that essentially all of the plastic fuel lines appear to have fuel running through them while cranking, but the newly replaced, plastic fuel line from the pre-filter to the heat exchanger appears to be flowing from the pre-filter to the heat exchanger. I thought the fuel in this line was supposed to flow the other way?

I have included a photo to show my current fuel line connection(s) I am 99% sure they are in correct order. At least while cranking there are no visible large leaks that have appeared. That's a good sign I hope. How long do I crank or should I crank before this thing catches?

Like I've stated, I've done 2 cycle co far as I don't want to burn up the started. I replaced the pre-filter and full flow filter w/ new units and refilled the full flow prior to re-intalling....

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'97 E300
'99 E300