MS3x BMW M50NV no start - fuel pump?

[NEOe30]

Hi all,
I have read the ms startup guide and gotten all the way to the end aaaaannnd no start

I have MS3x V3.57

A few steps that I noticed along the way were

- My tps is not synced, and wont read tps signal even when i use the sync feature. I dont think this is important to start up, or tuning in general since i am going speed density.

- My coolant temp sensor is not calibrated correctly, reading 180*F when the engine is cold. I know the sensor is good.

-My fuel pump will not prime. I am unsure why, and almost positive that this is the issue. I can confirm that purple wire 37 labeled "fuel pump" is connected to my fuel pump relay.

I am unsure of where to check next. Any help is appreciated.

[NEOe30]

MSQ files and Log here

[NEOe30]

Update: fuel pump primes, still no start.




Thanks for the help Grom_e30

[NEOe30]

New Log

[jsmcortina]

You are getting stable RPM, that's good. The datalog shows a PW is commanded too.

Have you used the test mode to check your coils and injectors work?

Check your plugs, are they wet or dry? The engine could be flooded with that large pulsewidth.

James

[NEOe30]

You are getting stable RPM, that's good. The datalog shows a PW is commanded too.

Have you used the test mode to check your coils and injectors work?

Check your plugs, are they wet or dry? The engine could be flooded with that large pulsewidth.

James

Just tested these a few hours ago thanks to grom_e30 and we have determined that I will need the BIP drivers or upgrade to LS coils. The injectors were pulsing but no spark. Other than this the car should start. Now just to figure out those pesky sensors...

[DaveEFI]

Hvae you got a Stim or Jimstim? That will show if the CTS input etc is working correctly. If it does work on that, chances are you have a wiring or sensor fault, or not calibrated in software. A good check is both CTS and ATS should read ambient temperature on TS with a cold engine.

[NEOe30]

Coolant and Tps sensors fixed, installing coil drivers this evening and will update

[NEOe30]

So now that I've got spark, fuel, and (almost) everything else needed to run, I go to turn the key and she chokes but wont fire. I feel like I'm missing something simple. Can anyone take a look at this datalog for me?

[billr]

Your MAP is dropping quite low, even with the slow cranking from having a low battery. Open the throttle stop position some.

[NEOe30]

Car starts, idle is decent. Looking for opinions on my maps before I begin to run VE autotune, also, which wire do I need to get an AFR signal from my aem uego to my ms?

heres my msq and a datalog

[billr]

Zero for injector dead-time??? That is pretty unlikely. Flow those injectors for rate and dead-time before putting a lot of effort into tuning. The VE table looks way too rich, probably because the DT is bogus.

PS: Spark and dwell times are higher than I'm used to seeing.

[NEOe30]

Zero for injector dead-time??? That is pretty unlikely. Flow those injectors for rate and dead-time before putting a lot of effort into tuning. The VE table looks way too rich, probably because the DT is bogus.

PS: Spark and dwell times are higher than I'm used to seeing.

Thanks for the insight, I'll make some adjustments. What would you reccomend for the dead-time? T As for spark and dwell, im running LS2 coils, are these setting still off?

[grom_e30]

4.5 or so ms for cranking, 3.5ish for nominal and 0.7-1 for duration.


https://www.youtube.com/watch?v=lJgi8l-2XG4 shows how you can flow test your injectors for dead time

[billr]

If you want to keep playing with the engine before flowing for DT, enter .8 msec for that. It will be a whole lot closer than 0... but your short "reqfuel" value cries for accurate flow and DT numbers.

[NEOe30]

4.5 or so ms for cranking, 3.5ish for nominal and 0.7-1 for duration.


https://www.youtube.com/watch?v=lJgi8l-2XG4 shows how you can flow test your injectors for dead time

If you want to keep playing with the engine before flowing for DT, enter .8 msec for that. It will be a whole lot closer than 0... but your short "reqfuel" value cries for accurate flow and DT numbers.

Found this wonderful site to set my dead time, I have Siemens Deka 60lb injectors. Dead time should be .64-.38, or .5 at a perfect 12v. Should work well?

http://injector-rehab.com/shop/lag.html