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Old 09-15-2011, 08:14 AM   #11 (permalink)
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I have already started saving. Even during testing I could see I had a heavy right foot!

I've done 62 miles since filling up and the mpguin is 0.07miles under the car odometer. So not too bad, initial setting (already had an idea what the vss pulses were from my previous efforts a few years ago).

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Old 10-19-2011, 04:40 PM   #12 (permalink)
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I got the JayCar pulse & hold module

I looked at the JayCar module and it looked good the price is au $19.95 . The price was right and the shipping from Australia was only $10.00

I built the module from the parts provided. The kit was very well done. The manual was excellent and made the job very easy.
I recommend this module for anyone who has pulse and hold injectors. It makes no sense to try and build your own circuit!

This solves that pesky problem completely.

If you want a completely assembled module and I can put the kit together for you for the included cost of the module and labor for $45.00 plus shipping to you.

email me: mailto:lklemetti@comcast.net


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Originally Posted by CrazyLee View Post
Hi, I found out this morning the photo's weren't loaded onto the server. I fixed that tonight. Comparing the traces for other P&H injectors they don't look like mine turned out. I got 50 MPG in my converter test. I think I know why. The mpguino may be reading the trace upside down! Looking at the small pulse gap between the actual first and last pulse. If I invert the signal it may read OK.
Nah! I still wouldn't get the actual pulse width. But it explains the 50 mpg reading.

I'll keep trying. I got the pre-built 'guino and I can't rebuild the code.

I may the Inj Delay to 1350us to see what happens there. It's at 500us now. I'm reading 13 mpg right now and 10.5 mpg is what I have been getting.

I really need to do a mpg run. I just filled up the tank. UGH! 70.119 gallons @ $3.509/gal= $225.00 I drove 60 miles w/ my 57 chevy in tow. The gauge shows about 5-7 gallons gone. about 8.5 mpg ( 5/5ths on my gauge. ) about 15 gallons per mark. 787 miles at 10.5 mpg. Hows that for hyper-mileing!

Cheers, Lee
================================================== ========
Thanks, Lee

Last edited by CrazyLee; 10-19-2011 at 10:54 PM.. Reason: added text
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Old 10-19-2011, 05:34 PM   #13 (permalink)
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Do you need an oscilloscope to dial in the jcar module?
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Old 10-19-2011, 10:51 PM   #14 (permalink)
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Smile

No you do not. I found that if you drove the vehicle a short distance (5 feet) the 'Guino would show a reading. If the V resistor was mis adjusted the signal out is a flat line and the 'Guino shows 999. Just adjust the pot until you see a display and move it a little more to be sure that it is stable.

I'm going on a trip this weekend and I'll report how it works. Right now I am happy with the results.

By the way, this kit is a dream to put together, well designed. It really makes sense to use it.

Cheers

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Do you need an oscilloscope to dial in the jcar module?
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Old 02-29-2012, 02:49 PM   #15 (permalink)
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does the Jcar module work with the standard Mpguino code or will I need to rework the code?
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Old 02-29-2012, 08:24 PM   #16 (permalink)
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Calibrating an MPGuino with a JCar module

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Originally Posted by bestclimb View Post
does the Jcar module work with the standard Mpguino code or will I need to rework the code?
The Jcar module works with the MPGuino. I have found out that my settings needed changing. the micro-sec/gallon was way off from what I was using.

The regular calibrating method should work well.

To get close I set it very high (Mine went to 40,000,000 to start!) and watched the instant MPG. I kept bringing the micro-sec/gallon down close to what you think what the car MPG should get.

Having a passenger fiddle with the switches to reconfigure the micro-sec/gallon number is a great safety feature! Then you can do it on the run.

After that do an actual fill up calibration. This should only be a two run test if you are close to start with. Follow the instructions on the website.

I hate to burn up that expensive gas!

Tell us how it went.
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Old 04-05-2012, 01:53 AM   #17 (permalink)
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@Crazylee, can you do a 328 conversion on an old 128 unit? Mine quit working way back and I was supposed to send it in but life got in the way. Someone knowledgeable with these things should be able to fix it and upgrade it. Oh and add a jaycar. What would be the cost?
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Old 04-05-2012, 08:07 AM   #18 (permalink)
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The jcar module costs $30.00 from Australia. You have to solder it together. I could do that for you at $60.00 total.

The 328 from a 128 unit wouldn't be possible. Just buy the better 'guino.
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Old 04-05-2012, 10:45 AM   #19 (permalink)
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Hmm I been away a while, though my last visit to the old purchase page looked like they weren't being made anymore. Where can the newest versions be purchased?
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Old 04-05-2012, 11:12 PM   #20 (permalink)
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Where to get the jcar module

Hi, I had to look through my posts to get the URL for the Jcar module.

Here it is.


Peak Hold Injector Adaptor "Kit Back Catalogue" - Jaycar Electronics

Thanks for the interest. The Jcar pulse & hold module solves that problem.
It is designed very well and easy to assemble. The instructions are superb!
Just ohm the resistors to make you get the right one in the right place.

It takes about 2 weeks from when you order it to arrive at your place.

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dsp, hit and hold, peak and hold, pulse stretch

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