Somehow my IAT is interacting with my TPS.

When the IAT sensor harness is disconnected. If you step on the throttle as the throttle goes through 100% my intake temp on megatune drops directly in relation to the TPS position.

I have checked continuity with the megasquirt disconnected and there wasn't any between the two.

MS1, ver 2.2, 029v, fuel only

Either the MS has been damaged or you have a wiring problem. Every MS i build gets run on my own car. The next thing you can do is hook it up the the stimulator to test the tps and IAT circuit. you wont get any tach but it doesnt matter you dont need it.

Kinda soungs like a ground issue. you can run a jumper wire to each sensor for a ground and try that.

The same thing happens with the stimulator.

.........................................................................................................................

Built. That's All...
.........................................................................................................................
www.monkeybuttpirate.com
.........................................................................................................................
2 Fingers of Scotch with a milk back... Stat!

I took some pics so that someone with a better eye may be able to find something.

The pics keep getting larger if you keep clicking on them.


http://www.memoryfoam.us/cpg144/thumbnails.php?album=lastup

Didnt you say that MS was one that I built? That is def not one i built or someone has rebuilt/changed portions of the MS. Portions of that board are not my work and some of it is not my materials. That board has been altered.

If it does it on the stimulator then something on the board is not right. See the jumpers on the bottom of the board? Make sure they are not shorting out to something

Edit: try loading an older Firmware into it and make sure its not a firmware glitch

Terry

This is the only thing I can see that is strange. There are surface scratches all around this area.

I have never been able to load 024s. I just tried again and it asked which com and then says it cannot complete the program.

Do you think it has to do with a usb to serial?

I found a computer with a straight serial connection and was able to load 024s firmware onto the MS. I then configured megatune and the 550cc setup file.

I still have the issue with the TPS and IAT.

Ok RS autosport went through it so that explains why some things are different than when I built it. I wasnt saying it wasnt mine just that its been altered.

Tell you what, send it back to me, let me install it into my car and fire it up. I wouldn't charge you for it so dont worry about that.

The problem has existed ever before you sent it to rodney? That means they are putting it on a Stim and its working fine for them, IF they are paying attention to what it is really doing. The V2.2 board is semi failsafe. Its not likely a ground issue on the board. I want to try swapping out the ECU chip as well if it does do it for me.

I dont understand why you cant load the 024 firmware. You are jumpering the bootloader correct? Its possible your USB adapter is the problem and the code isnt getting loaded correctly. Do you have a desktop with a serial you can try?

Terry

Hopefully this turns out for the better Mark. As I was sayin the other day at your house, I figured RS-Autosport altered the board somewhat and/or there is a problem with the usb > serial adaptor. I guess we'll see what happens when Terry fires it up. If I remember, next time I can bring my laptop with all my files, msq's, and the 024s13c firmware I believe is what I was runnin before my car went down last year.

-Xavier-
95 Eclipse RS-T...lost in the frozen tundra

Thanks for the help over the last week. I was able to get the o24s firmware installed and it still had the same symptoms.

Terry is being gracious enough to check it out for me. Hopefully we will know soon what is up.

Thanks again.

Ok Mark, here are a few things I noticed. The problem exists with the 024 code as you stated. In my car the MS claimed my IAT was 131 degrees. Kinda hard when the car is cold and temp is actually 77 degrees. I checked with both a Mutimeter and my Scanner.

I loaded code again to make sure it wasnt a firmware issue and it isnt. I swapped ECU chips with the one from my MS and sure enough the problem cleared up. Your ECU chip is bad. Not sure if its not accepting the firmware loading or if it is communicating improperly.

I noticed a few things on the MS board that grabbed my attention. Some of the hardware has all been changed from the original build. A few components are also different. Most important I noticed the Socket that the ECU chip mounts into was changed. I have no idea why this was done and I know it was done because I have never seen a socket like the one in your MS in any kit I have produced. If it werent for a few little details of the baord, i would say someone swapped the MS with another but that is not the case.

At any rate you need this and your good to go:
http://www.diyautotune.com/catalog/cpu-megasquirti-cpu-p-105.html?osCsid=c4d015e7688e74f53b757bf946f34c68

I can either install it for you or I can ship this back to you and you purchase and install it. It doesnt matter to me either .

Terry

Good stuff, good stuff Terry!

So, if the v3.0 chip goes in there...since he had the v2.2 board setup, does anything else need to change or what not at the same time?

-Xavier-
95 Eclipse RS-T...lost in the frozen tundra

no all he needs is the ms1 chip or he can convert to the ms II chip

Actually I don't know if Joel is running a MSII chip or not.

Let me find out today.

NO...he is defintely NOT running the ms-II chip. MS1 with v3.0 board on some version of the 029 firmware. Go with that, nothing wrong with that setup at all...

-Xavier-
95 Eclipse RS-T...lost in the frozen tundra