MS First Time Startup Problems

[KillerPM]

MS Experts,

I am finally at the point with my Bad Bav project where I can start the car for the first time. Here is the setup:

MS2/Extra release 3.3.1, TunerStudio 2.6.01

M30B34 with Motronic 1.3 setup from a B35. Single coil (from the B35) for now. I am told I have healthy spark when I crank the car. The car will not start.

My hypothesis is I am not getting a good enough signal from the VR sensor on the toothed wheel. When I run the tooth logger it shows the teeth but when I stop cranking, it quickly goes away. Is there any way to view the logs I capture or do I have to go through the CSV?

Can someone take a look at my tune? I dont think I am missing anything. Posted are my tune, my log and the toothed wheel csv. Any help is appreciated! I am pretty new at this.

140808-BadBavTune.msq
2014-08-07_22.07.41.msl
2014-08-07_22.20.33.msl
2014-08-07_22.07.37.csv

[KillerPM]

Here is what (I think) is a better tooth log from the composite viewer. It shows all 60 teeth. I think my problem is where the missing tooth is its not a single spike, but two (meaning its reading phantom teeth).

I will do some more research but any help is appreciated.

comp2014-08-07_22.20.37.csv

[KillerPM]

Just posted on the MSextra board as well.

http://www.msextra.com/forums/viewtopic ... 01&t=55421

[marc79euro645]

You need to mark the balancer at tdc with a pointer and use an adjustable timing light to see what the actual timing is. if your megasquirt led flickers when cranking then your getting enough vr pulse to at least register.
good luck
marc

[elcrazon]

You didn't mention anything about having your injectors wired differently than stock, so I'd think your setting of Sequential/Semi-sequential might be incorrect. Also, I believe the recommended setup for the trigger wheel is to have it trigger on rising edge, which makes it ~84 degrees instead of 89 degrees you have for falling edge. This also requires having TSEL jumpered to VROUT and not VROUTINV. Do you have any sort of conditioning circuit on the VR before it goes into the megasquirt? I'm using an adapter board that has a conditioning circuit, but I'm not sure it's necessary. Additionally, is there a reason your AFR in the ReqFuel calculation is set to 13.8 and not 14.7?

[KillerPM]

You didn't mention anything about having your injectors wired differently than stock, so I'd think your setting of Sequential/Semi-sequential might be incorrect. Also, I believe the recommended setup for the trigger wheel is to have it trigger on rising edge, which makes it ~84 degrees instead of 89 degrees you have for falling edge. This also requires having TSEL jumpered to VROUT and not VROUTINV. Do you have any sort of conditioning circuit on the VR before it goes into the megasquirt? I'm using an adapter board that has a conditioning circuit, but I'm not sure it's necessary. Additionally, is there a reason your AFR in the ReqFuel calculation is set to 13.8 and not 14.7?

I will have a look at the injector settings. What should it be? It's the stock moronic 1.3 setup. Is there a setting for banked? I will look and research.

The ms extra board suggested rising edge as well. Peter Florence's documentation says to use falling edge so that's how that got set.

The build was purchased from pftuning by its previous owner. I read that Peter builds all his setups with the required conditioning for the vr sensor.

I will adjust the req fuel. Is 14.7 not too lean though?

[Kyle in NO]

This is exactly why I use Peter Florance for everything related to MegaSquirt. Truly an electrical genius and troubleshooting extraordinaire.

[Cjames570]

The 14.7 in reqfuel is only for stoich reference of gasoline, it has no control over the actual fuel. Using a different stoich in reqfuel is only if you are using an alternative fuel. Definitely change the injection off of sequential up to untimed. Start here and see what happens. I can't comment on the VR signal issue, as I am fairly new to the tuning game, but I do have one question.... Did you wire, in series, the resistor for the VR signal? I think it was an 18k or something?

[KillerPM]

This is exactly why I use Peter Florance for everything related to MegaSquirt. Truly an electrical genius and troubleshooting extraordinaire.

Its a PF board and setup. I bought it from a member on the board who was offloading his setup.

Peter wont support it because I am not the original purchaser. It is his build though...

[KillerPM]

The 14.7 in reqfuel is only for stoich reference of gasoline, it has no control over the actual fuel. Using a different stoich in reqfuel is only if you are using an alternative fuel. Definitely change the injection off of sequential up to untimed. Start here and see what happens. I can't comment on the VR signal issue, as I am fairly new to the tuning game, but I do have one question.... Did you wire, in series, the resistor for the VR signal? I think it was an 18k or something?

Changed it to injector settings to untimed, changed the reqfuel, changed the trigger wheel to rising edge and I got a good crank pulse. At least until the starter died. It was a fresh rebuilt starter and everything. At least its an E34 one that should be easier to replace.

When I did my first crank with the changed settings to check the timing (which I verified is perfectly at TDC with the settings zerod out), the car even tried to start with the remaining fuel in the rail.

Time for a starter change and I bet this puppy will fire

Then the fun begins!

[T_C_D]

This is exactly why I use Peter Florance for everything related to MegaSquirt. Truly an electrical genius and troubleshooting extraordinaire.

Its a PF board and setup. I bought it from a member on the board who was offloading his setup.

Peter wont support it because I am not the original purchaser. It is his build though...

He will support it for a fee. Which is $$ well spent if you get lost. I sold a used MS1 unit this summer and will be buying tech support from Peter if I cannot properly support the end user.

[akluminus]

The 14.7 in reqfuel is only for stoich reference of gasoline, it has no control over the actual fuel. Using a different stoich in reqfuel is only if you are using an alternative fuel. Definitely change the injection off of sequential up to untimed. Start here and see what happens. I can't comment on the VR signal issue, as I am fairly new to the tuning game, but I do have one question.... Did you wire, in series, the resistor for the VR signal? I think it was an 18k or something?

I used a 10K inline and it seems to be working well.

[KillerPM]

I ended up sorting it out. It was the Rising Edge / Falling Edge setting. Rising edge solved it.

I get a really good looking tooth log now.

[cvillebimmer]

Glad you got it sorted out!