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Old 04-13-2014, 06:45 PM   #1
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Default MS2 Basic starts then immediately dies

I recently bought a used Rev-built MS2 here on the forums to upgrade from my MSPNP.

The car ran pretty good on the mspnp but the ecu had a problem with random resets while cruising. Only mods are Toyota cops in batch fire, Five-o 550cc injectors, Coolant reroute, and an LC-1.

I connected the ecu, lc1 to the ecu and map line. I adjusted the req fuel for my injectors and opened the idle screw on the throttle body all the way up. The car cranks, begins to start, revs to about 1000 rpm and then immediately dies.

I've tried adjusting the fuel in the idle cells, trigger angle, a few different idle settings but I'm not sure what else to try.
The composite log looks very similar to what it was MSPNP, however I don't really know how to interpret it.

I attached my MSQ below.

Thanks for the help - Mike
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File Type: msq MS2Tune.msq (84.4 KB, 54 views)
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Old 04-14-2014, 03:01 PM   #2
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Should i try jumping the fuel pump in the diagnostic box? I can hear the pump prime when i turn the key.
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Old 04-14-2014, 05:58 PM   #3
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VTPS installed?
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Old 04-14-2014, 06:16 PM   #4
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It is, and calibrated.
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Old 04-14-2014, 06:23 PM   #5
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Start by setting your required fuel properly. Its 3, when it should be around 5.
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Old 04-14-2014, 06:27 PM   #6
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It was around 4.8 , i tried lowering it just to get it to start.
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Old 04-14-2014, 06:30 PM   #7
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How is it going to start with almost half of the fuel required?

Also, disable additional drivers in the sequential options.
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Old 04-14-2014, 06:40 PM   #8
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I never said it was smart :-( . It smelled like fuel but that was probably due to several failed starts.
Ill try to disable those drivers when i get home. Thanks for the help, I really appreciate it.
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Old 04-14-2014, 11:06 PM   #9
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I set the reqfuel back to 4.9 and disabled the additional drivers under the seq settings. Still doing the same thing.

I took a short log of it trying to start up. Also there is a composite log from startup yesterday.
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File Type: msl start.msl (37.4 KB, 36 views)
File Type: csv miatacomp.csv (10.4 KB, 31 views)
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Old 04-15-2014, 03:02 AM   #10
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Hopefully, you also switched the ignition off and on again after you made the changes discussed above.
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Old 04-15-2014, 09:45 AM   #11
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Quote:
Originally Posted by hochkis View Post
I set the reqfuel back to 4.9 and disabled the additional drivers under the seq settings. Still doing the same thing.

I took a short log of it trying to start up. Also there is a composite log from startup yesterday.


here's a question: what would normally make a car stall?

Is it possible it's leaning out and unable to continue running? How do you possibly imagine you could solve this problem? Maybe by adding fuel to your start-up enrichments?

Or maybe your idle valve is closing too fast? I wonder how you could find that out? Could you hold it open longer? Possibly? But how does one do that? Through tuning a completely programmable aftermarket ECU? posting online?
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Old 04-15-2014, 10:33 AM   #12
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Its going into fuel cut above 400rpm.

I opened his basemap to try and find the source of the fuel but it is so messed up, I don't know where to even begin.

It is like someone with absolutely no idea to what he was doing just tried random values everywhere.
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Old 04-15-2014, 10:45 AM   #13
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Quote:
Originally Posted by Reverant View Post
It is like someone with absolutely no idea to what he was doing just tried random values everywhere.
sounds like the mt.net approach to EFI.
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Old 04-15-2014, 11:29 AM   #14
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Quote:
Originally Posted by Braineack View Post
here's a question: what would normally make a car stall?

Is it possible it's leaning out and unable to continue running? How do you possibly imagine you could solve this problem? Maybe by adding fuel to your start-up enrichments?

Or maybe your idle valve is closing too fast? I wonder how you could find that out? Could you hold it open longer? Possibly? But how does one do that? Through tuning a completely programmable aftermarket ECU? posting online?
I added fuel via start up enrichments, it had no effect so I set it back to where it was. According to the data log I posted the injector pulse width goes to zero after the car begins to start.

Shouldn't the car be able to start even if the idle valve was closed, if I as I said in my first post opened the idle screw all the way open? Or should still be able to start by feathering the gas pedal once it begins to start.

The MS2 has far more menus than my old MSPNP, sorry for being a .
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Old 04-15-2014, 11:33 AM   #15
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Quote:
Originally Posted by Reverant View Post
Its going into fuel cut above 400rpm.

I opened his basemap to try and find the source of the fuel but it is so messed up, I don't know where to even begin.

It is like someone with absolutely no idea to what he was doing just tried random values everywhere.

Rev, I did cycle the ignition after makings the changes.

Sorry about the mess of a basemap, like I said it is simply what was loaded on the ecu from the previous owner.

I'll look through and try to find what could be cutting fuel above 400rpm.

Thank you again for your help.
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Old 04-15-2014, 11:46 AM   #16
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While at it, change spark output polarity to going high or you will fry your coils.
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Old 04-16-2014, 12:58 AM   #17
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Well I tried disabling anything that would possibly cut 100% of fuel such as overboost, launch control, rev limiter, overrun but I am still having the same issue.

Should I possibly try reloading firmware?
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Old 04-16-2014, 04:06 AM   #18
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Sure.
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Old 04-16-2014, 04:38 AM   #19
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I assume I would get an error message of some sort if it were corrupted.

Last edited by hochkis; 04-16-2014 at 05:01 AM.
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Old 04-16-2014, 05:21 AM   #20
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Well I reloaded 3.2.5 firmware and it started right up after a few cranks. Plugged in the values from my old VE map and its pretty darn close just need to do some driving around to fine tune and work with some of the idle settings. Thanks for help.
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