(11-10-2009 10:42 AM)machouse Wrote:  As I say to Rich, maybe I will purchase the "PWM 40A Current Limiting" item if I succeed my EFIE installation.

Where do you buy it from?

PS: Your measurements do not make any sense. An oscilloscope is highly recommended.

I will not buy an oscilloscope especially for that, I already lost a lot of money with my HHO experience...

I'm tired to read that my results doesn't have any sense. For me, and after a couple of tests, the mike EFIE is not working.

So I will send back the EFIE and ask for a refund.

---

I checked my measures again this morning. I put my black probe on other car ground point and nothing have changed.
The measures are the same.

I found the "PWM 40A Current Limiting" item here :
http://www.advancedhho.com/product-p/pwma001.htm

Hi machouse,

We can give you a refund. That's not a problem. But don't take it personal when we are querying your data. There is something that doesn't add up about this, and we're just trying to get it figured out. If we don't tell you what seems to us to be impossible data, we'll never get to the bottom of it. Please don't feel like we're accusing you. But when we see what seems like impossible data, we know we are getting closer to a bug. So that's why we are hammering away on the data.

As I said, I one time chased my tail for several hours, getting impossible readings on a project I was doing, only to find out the meter leads were faulty. I think we're going to find something like that in this case. For instance, did you ever recheck your measurements using a different meter? That might be a good idea in this case.

(11-11-2009 10:46 AM)mike Wrote:  There is something that doesn't add up about this... If we don't tell you what seems to us to be impossible data...

Literally, it doesn't add up.

Follow this:

(11-10-2009 08:50 AM)machouse Wrote:  

(11-09-2009 04:20 PM)mike Wrote:  ...gray ground...That's the one you were measuring .73 volts on, right? And does that voltage remain nice and steady when the engine is running?

Yes this voltage remain nice and steady. I put the red probe on the gray wire (ground signal sensor) and the black probe on the car ground.
....
EFIE set on 450mV. Red probe on the EFIE's output to the computer and black probe on vehicule ground :
The voltage is changing back and forth from 0,93V to 1,53V when the EFIE is off.
But the voltage is changing back and forth from 2,6V to 3,3V when the EFIE is on.
....
EFIE set on 450mV. Red probe on the EFIE's output to the computer and black probe on gray wire :
The voltage is changing back and forth from 0V to 1V when the EFIE is off.
But the voltage is changing back and forth from 0V to 0.3V when the EFIE is on.

Does it make any sense to you?...

I guess the gray wire is not steady at 0.7V when the EFIE is on, it is moving from 2.6 to 3V. I bet.

I'm a computer scientist, not an electronics engineer.

Tell me what to do on the EFIE to have a result but don't ask me if I think a result is good or bad.

I don't have another meter but I can ask one to a friend.

I will also measure the gray wire with EFIE on (black probe on the ground and red probe on the gray wire)

Again, don't feel accused. But I think borrowing a friend's meter is a good idea. Just to make sure.

We're not blaming you for the results. We are just trying to understand.

If you lived in the US, I would've had you send the unit for testing, just to be sure about that. But it only takes a few days and a few dollars to do that here. Also, it really sounds like the EFIE is doing everything the way it is supposed to. But if the new test with your meter doesn't work, then I think you should send it in to us. If we find it doesn't work here, I'll send you a new one and pay for your postage. But from all you've said, I think it's working. And there's something else going on that we haven't spotted yet.

(11-11-2009 03:33 PM)machouse Wrote:  I'm a computer scientist

You should be able to find a freeware to make a simple oscilloscope from your pc. This will make your project easy.

(11-11-2009 02:06 PM)hhoelectronics Wrote:  I guess the gray wire is not steady at 0.7V when the EFIE is on, it is moving from 2.6 to 3V. I bet.

I took the measures and this is what is approximatively happening when I put the EFIE on (black probe on car ground and red prob on ground signal).
I see a fluctuation between 2,4V and 2,7V when the EFIE is on.
Constant 0,73V when the EFIE is off.

Wow. This one has got me flummoxed. Maybe it's a faulty EFIE. As I've said we haven't seen one yet with this design. But that's just too weird. Here's what I propose:

0) Take a digital photo of your unit, and then tell me in a narrative where each wire goes. There may be an error in the hook up of the EFIE that will make the rest of these steps unnecessary. Send that to support@fuelsaver-mpg.com. Be sure to reference your screen name (machouse).

1) Send that unit back to me. Use the lowest cost transport available.

2) I'm going to ship you an analog EFIE. Analog EFIEs aren't as good as digital, but they are extremely versatile. They don't have trouble floating on top of any odd voltages you may have there. I will send you a used one, but it is fully tested and working. You will keep it regardless of anything else we do. I'll need you to email me your real name and address since I don't think you bought the unit from us directly.

3) I'm going to test your unit. If it's faulty I will pay for your cost to ship it back to me. I will also then replace it or give you a refund at your discretion. If it's not faulty, then you won't be reimbursed for the shipping back, and we'll at least know its not the EFIE, and can proceed from their to get it figured out.

One way or the other, we'll get this thing figured out.

For the first step, it means that I must open the EFIE ?
How I can open it ?