Thread: Forced induction on fuel injection

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When installing forced induction on a fuel injection engine, how much do i need to change the fuel pressure if I don't change the electronics and run the stock computer?

There may be people who can help here, like maby Swifster but, if your takling about your Neon , most of us arn't farmiliar with the 4cyl stuff. I'd think the computer would ajust the fuel pressure/ mixture itself, just as it does when going from a higher to a lower altitude or vise versa, forced induction would be calculated as a lower altitude as places at lower altitudes have higher air preassure, it might flash a check engine code saying the preassure is higher than the tolorance the computer allows but it should ajust itself.

Again if this is for the Neon, there are a few things to understand. First, the stock electronics will not support a turbo or supercharger. While not specifically aware of how the Mopar stuff is set up, the OEM computer should be able to be reflashed (to a point, depending on the gains desired) to handle moderate gains if this is a stock based engine.

2nd, with the engine being a giant air pump, you'll want to increase the breathing of the engine. This would include headers, a better intake, and it would make all kinds of sense to have the head ported.

And last, these engines are notoriuos for blowing head gaskets. Running anything over 3-5 Psi will seriously give this engine problems without doing some serious work. Adding to that, this engine has a compression ratio of 9.5:1 or higher, and making the breathing improved is even more important unless the engine is being completely rebuilt.

Thanks thus far. Swifter, about the head gasket, what problems are you referring to, Idon't know of any problems thusfar. I'm going MAP, and yes this is my neon.

Originally posted by Dodge This One
Thanks thus far. Swifter, about the head gasket, what problems are you referring to, I don't know of any problems thusfar.

There are two types of Neons; Those that have alreay blown a head gasket, and those that will. Blowing head gaskets on a Neon is this cars most common problem. Far more so before the body refresh in 2001, but even newer cars have problems.

Type in 'Neon Head Gasket' in your search engine of choice and enjoy the reading. If you think you'll want high horsepower, you better O-Ring the block.

Actually the body refresh was between 99-00, 99 being the last year of the coupe, and the last 99's had a factory mls gasket in them. And also I've swapped to the 2002 magnum SOHC engine.

I work as an insurance adjuster. I've seen this problem on the newer cars/engine as well (people try to claim everything ). The last one I saw was last fall in Toledo, an '02 (base engine).

Well, Chrysler doesn't think it's so rare; They paid to have the car repaired under warranty when then warranty had already expired.