I just bought an HHO kit to install on my 2002 Neon. For those of you who might not know what it is, it lets you run your car on hydrogen along with gasoline. Before I install it though, I have to get a piece of equipment that will fool the computer so it doesn't give too much gasoline.

So, what I need to know is, do the Neons have MAP sensors or MAF sensors. Thank you in advance to anyone who can help me out.

 

Yes, Neons have a MAF (Mass-Air Flow) and a MAP (Manifold Absolute Pressure) sensors.

The HHO kit not only produces Hydrogen, but also Oxygen... combined, pure HHO burns at over 5050 degrees... so make sure you install that one-way valve correctly or it will go kaboom on you.

You need an EFIE box to control your O2 sensor output, by intercepting it and producing a new signal to send to the ECU... I will post you a link in a minute.

Here is a pdf file you can download to build an EFIE by yourself, assuming you have some electrical skill:

http://www.uploadline.com/file/634/Build-EFIE-pdf

If you choose not to build one, you should still read this anyway to have a good understanding of what the system is for, and how it operates between your O2 sensors and ECU.

You can also search "EFIE" (electronic fuel injection enhancement, although the original acronym stands for something else) on Ebay, and should be able to buy an assembled plug-and-play one for $60 or so.

I may also suggest that you can try to run your HHO first without the EFIE, just to see what happens (if the HHO output isnt that high, you may get away with not needing an EFIE)...

 

this is a link to the EFIE that i recommend

http://www.eagle-research.com/store/...products_id=16

remember you will need one EFIE for each upstream O2 sensor.

 

iowa, from what i understand you dont have to mess with the MAF/MAP sensors. is that true to the best of your knowledge?

 

True. There is no good reason I can think of why you need to mess with anything, except the O2 + EFIE setup...

That if you even need the EFIE at all... a 00-02 Neon may not need one. A 03-05 Neon (NGC) would have a higher probability of needing the EFIE... I would still try it first without one, just to see what results you get.

 

well, im doing a HHO on my 2000. right now i'm gathering parts and info, before i go and do the install. this is not my DD neon. my DD is a 05, and its under warranty till 80k, so im not messing with that yet. if all works and the gas savings is real good, then im gonna make the 2000 my DD. honestly paying for gas isnt killing me financialy, whats killing me is the fact that i have to pay for gas at this price. i drive alot of miles, not to work, but for pleasure.... we love to go away, on road trips and weekend vacations and i hate the fact that im giving my money to the middle east and other foreigners. if most of this oil was coming from US sources, i wouldnt care at all. im that kinna guy that searches out USA made products.

 

Awesome...

I am still building my own HHO gen right now... the only thing I dont have complete is the container for it, although I do have it... just havent finished it yet.

 

So, I just won an auction for as an EFIE on ebay. That's all I need then? But, I need one for every o2 sensor? That's the first I've heard that.

 

Maybe, maybe not... if you need one, only the upstream is your priority unless something really odd comes up. Make sure you read up on it a bit though before you tune it... it will benefit you in avoiding any problems. Also FYI I believe the output voltages on the upstream O2s on the NGC Neons usually floats between 2.5 - 3.5 volts... I have to double-check that though.

 

It is nice to have people smarter than me that are willing to help. My 2000 neon did not have EFI (electronic fuel injection) and from the info I have read so far that would mean I don't need an EFFI?
I traded up in 2005 for a PT Cruiser that I am now determined to put an HHO system on. I might even buy it out of a box. Ha Ha.
This jargon is all new to me and a little intimidating. I haven’t worked on a car majorly sense dropping a 440 in my buddy's '70 Cuda.
Anyways the neon and cruiser use the same platform and engine. My '05 still has a carburetor. I am still assuming that I do not need an EFFI but I will need the MAF controller to lean out the mix and see the fuel savings.

Info I have read says the exhaust O2 sensor just tracts the efficiency but doesn't control anything (so it doesn't need to be changed). It also says some cars have 2 sensors on the intake? I am guessing that a 4 cylinder economy car only has one.

Does this make any sense? Is any of this wrong?