A return line is simply a line that fuel back to the tank through. There is no vacuum in it, no vacuum line os run to it or hooked to it. The fuel pressure regulator should have a vacuum hose on it though.
BTW guys my '96 fuel rail has a return line on it.
I assume that you're going boosted, since you mentioned the intake doesn't look like it'd handle boost well. Must be getting a Stratus or minivan engine, w/ the plastic intake?
Why wouldn't you just use a SRT intake? unless you're pushing a lot of hp, you don't need a "custom" intake. There's plenty of 375-400+ hp SRT's running the stock intake.
Not sure if the newer cars are the same, but on the older Chryslers Code 12 was Recent Battery Disconnect, and Code 11 was No Distrubutor Sync Signal. Since there's no dizzy on the 2.0, Code 11 might be crank or cam sensor.
I see the Neon guys have problems w/ sloshing the oil around and starving the engine of oil in hard cornering. Do the Avengers have this problem too or no? I know the pan is different, kinda looks like it would be a bit more resistant to slosh.
From what I've heard, all the 2.0/2.4 head will interchange, as far as bolting on. Supposedly they are basically the same head, I know the SRT guys like to run 2.0 cams in their 2.4's. For that matter, the 2.0/2.4 head also bolts onto the old 2.2/2.5 engines and works, this also has been done many times.
Okay, just to be sure, does this mean that aftermarket hi-compression pistons for a Neon will fit the Avenger too? I'm like 99% sure they will, but don't want to buy a set and find out some piddly little thing won't let me use them SOHC and DOHC pistons interchange too or no?