E28 Megasquirt FAQ

FirstFives Dictator · Post by **FirstFives Dictator** » Aug 19, 2009 6:59 PM

turbodan wrote:I use 100% TPSdot accel enrichment. With MAPdot I was getting erroneous accel triggers as MAP fluctuated under boost. TPSdot can be made to work very well.

I have my TPS threshold at 4%/sec. The lower the better until you get into the noise. I also use different accel PW settings: .3 seconds accel time, .3 taper time and 0 MS end PW. Works great for me and my code variant. A 2 MS end pulsewidth would be huge with the injector sizes I'm used to. Gotta be careful with settings like that.

You must have an older release of code

turbodan · Post by **turbodan** » Aug 19, 2009 7:37 PM

beta code from 6/07

alijonny · Post by **alijonny** » Aug 20, 2009 12:02 PM

Big Bronze Rim wrote:You don't have to buy a MLV liscense, it will just ask you to register each time. I went ahead and registered it as I had no problem paying for the product as it was instrumental in tuning my car.
As for uploading your files, use something like fileshack or rapidshare to host them. Someone else may be able to recommend a better solution though.

I must be having a problem actually saving the file for viewing as a "video" of the acutal log. I can save a snapshot of the file, but that doesn't seem to give enough info.

alijonny · Post by **alijonny** » Aug 20, 2009 12:06 PM

this is what I can post. this is just a warm startup, hit the gas and let it idle.

FirstFives Dictator · Post by **FirstFives Dictator** » Aug 21, 2009 6:23 AM

turbodan wrote:I use 100% TPSdot accel enrichment. With MAPdot I was getting erroneous accel triggers as MAP fluctuated under boost. TPSdot can be made to work very well.

I have my TPS threshold at 4%/sec. The lower the better until you get into the noise. I also use different accel PW settings: .3 seconds accel time, .3 taper time and 0 MS end PW. Works great for me and my code variant. A 2 MS end pulsewidth would be huge with the injector sizes I'm used to. Gotta be careful with settings like that.

I should say that I would always use TPS if it's an option as it should be 'ahead' of MAP readings in triggering AE.

I'm using EAE but am using TPS to trigger lag compensation.

FirstFives Dictator · Post by **FirstFives Dictator** » Aug 21, 2009 6:27 AM

alijonny wrote:
Big Bronze Rim wrote:You don't have to buy a MLV liscense, it will just ask you to register each time. I went ahead and registered it as I had no problem paying for the product as it was instrumental in tuning my car.
As for uploading your files, use something like fileshack or rapidshare to host them. Someone else may be able to recommend a better solution though.
I must be having a problem actually saving the file for viewing as a "video" of the acutal log. I can save a snapshot of the file, but that doesn't seem to give enough info.

Ali,
You already have the file. The file you loaded into MLV is the file we want. That way we can pick the variables we want to see. How bout you email me one that you have a question about?

alijonny · Post by **alijonny** » Aug 21, 2009 5:56 PM

I sent an email to peter, lets see if it functions.

alijonny · Post by **alijonny** » Aug 21, 2009 6:06 PM

http://rapidshare.com/files/269981924/2 ... 9.msl.html

so this should be the file also. This is me starting the car cold and pulling it out of my shop, letting it warm up above idle (because it won't idle until warmed up), letting it die about 5 times and then taking it around the block with a minute cooldown after. the car may have hit a solid 3 psi of boost, but I did not give the car hell. it still seems to be lacking about 75% of it's power.

Lee in Ottawa · Post by **Lee in Ottawa** » Sep 01, 2009 5:54 PM

Anyone know why ms would see 3.8 volts when my output wire on my lc-1 is connected but when it's not it reads the proper voltage?

Xenocide · Post by **Xenocide** » Sep 01, 2009 6:50 PM

Has to be something grounding out. Have you connected to the LC-1 without it plugged into megasquirt?

Lee in Ottawa · Post by **Lee in Ottawa** » Sep 02, 2009 11:16 PM

I confirmed the LC-1 appears to be working via the serial connector on it, and the LED flashes properly. I haven't got to really play with it yet. I plan on:

- confirming the pinouts on the ms unit
- check voltage at the LC-1 signal wire

Anything else? It's kind of baffling. The MS unit may be miswired. It's an early goathumper board which has an extra DB-9 connector for sensors. (?) The TPS wasn't connected to the 55 pin motronic harness at all, so maybe the O2 is the same. *shrugs*
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Xenocide · Post by **Xenocide** » Sep 03, 2009 1:05 AM

Are there any wires heating up when the car's turned on? You'd have to have a pretty serious short (or a very dead battery) to drop that much voltage.

alijonny · Post by **alijonny** » Sep 04, 2009 7:44 PM

back to my situation, I put more fuel in the car and drove it. I am having some problems after the car warms up with idle. The car kind of wants to do it's own thing with idle no matter what I do. It will constantly stay above 1200rpm. I still don't have much for cold start idle, I have to give it throttle in order to keep it running. any quick ideas? I am held at bay right now enjoying the 745i so this MS project has turned more into a project. I am sadly starting to think bad thoughts about scrapping this project and taking it back to N/A. boo.

FirstFives Dictator · Post by **FirstFives Dictator** » Sep 07, 2009 8:59 AM

alijonny wrote:back to my situation, I put more fuel in the car and drove it. I am having some problems after the car warms up with idle. The car kind of wants to do it's own thing with idle no matter what I do. It will constantly stay above 1200rpm. I still don't have much for cold start idle, I have to give it throttle in order to keep it running. any quick ideas? I am held at bay right now enjoying the 745i so this MS project has turned more into a project. I am sadly starting to think bad thoughts about scrapping this project and taking it back to N/A. boo.

Contact me after the 11th and we'll figure out your idle issues

alijonny · Post by **alijonny** » Sep 07, 2009 4:29 PM

sounds good to me.

bornagain · Post by **bornagain** » Sep 07, 2009 4:36 PM

so silly wuestion but i cant seem to find where i saved this info, but i have gone and gotten the six wire tps but i cant find the pin out for splicing the wires. my original has br/bl br/bk and br which wires go where, am i to assume correctly that the sheilded wires ( yellow brown and black) dont get used? thanks alot. silly but i just want to make sure.

Post by **Brad D.** » Sep 07, 2009 4:42 PM

It was buried in this thread.

Big Bronze Rim wrote:you want to use the yellow, black and brown wires.

Brown - ground - splice it into any available MS ground

Yellow - signal - splice this to the tps signal in pin on MS

Black - 5V reference power. MS has a 5V reference voltage output.

bornagain · Post by **bornagain** » Sep 07, 2009 4:46 PM

thanks brad you always come through for me. hopefully it will be running by friday

bornagain · Post by **bornagain** » Sep 21, 2009 2:11 PM

So i have a bit of a problem,

I had it rrunning last night and i had an issue with one of the injector banks not firing when i traced the problem out i had D17 back wards, after resoldering it in properly everything was running way better but after about another hour of setting up the unit, it stopped working like it is supposed to, when i crank there is no signal to the injectors, and when i roll over the key to on the middle and the right lights flash then go out, the fuel pump no longer primes and the fan doesnt cycle on, nor does my idle valve start running(idle valve normally comes on with on possition as it is a pwm valve). The worst part was it was after doing a few burns to the chip. also it will not communicate with my laptop any longer with it plugged in to the car or the stim, but with the stim i know the chip is gone in it. If there is someone i can talk to in person i would really appreciate that, It is unfortunate for me but i have a need to be finished this project asap as my sister is kicking me out of her garage.

Most of this was copied an pasted from the email i sent DIY

Thanks in advance brad, turbo dan, and all others who reply haha

On a side note it sortof did the same thing to me the other night when i was doing my output and input tests for my wiring. But when i went back to it the next day i was able to reburn a previous map on to it and i accredited it to me being overly tired and having corrupt files, but i think something had to cool down for it to work properly again, or something like that. I am going to see if it runs today now that it has cooled off a bit but i have gone over all my soldering and cleared any and all flux that could possibly bridge anything.

bornagain · Post by **bornagain** » Sep 21, 2009 2:26 PM

ohh and if anyone says i need to do more reading.... i have done so much trying to figure this out words are starting to turn to blob on the page.

M. Holtmeier · Post by **M. Holtmeier** » Sep 21, 2009 6:02 PM

Have you tried reinstalling the firmware? I had mine glitch like that and lost comm and everyting.

bornagain · Post by **bornagain** » Sep 21, 2009 8:36 PM

that will be the first thing i will try tonight. Hopefully that solves my issues cause thats seriously not cool, other then that i have to finish connecting the front half of the exhaust to the rear half and get my oil pressure line from my buddy and i should be street tuning right away.

bornagain · Post by **bornagain** » Sep 22, 2009 12:40 AM

you guys are amazing. thank you thank you thank you dan.

Post by **Brad D.** » Sep 22, 2009 12:42 AM

So a firmware reflash fixed the problem? Whenever I have a weird issue with MS, that's one of the first things I do.

bornagain · Post by **bornagain** » Sep 22, 2009 12:45 AM

yeah at first i was freaking out cause it wouldnt open up the comm when saying i wasnt upgrading from ms2 firmware so i had to go the jumper route then un jumpered, either way it works. brad what firmware are you using cause if possible i would really like to have your msq file so i dont have to re-enter it all. ohh haha did i mention i had to delete anything related to ms or megatune completly off my laptop for it to work.... i should have hid my msq on my other drive but i was a dumb ass and in desperation now i have to load it all again.

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E28 Megasquirt FAQ