Renovelo Forum

my e46 2.5 dme ms43 injectors of 52 lbs bosch 100% ethanol from sugar cane, it starts very cold, when hot it starts with a lot of fuel the injector time at the beginning goes to 16 mls I've looked in all the tables and I can't find anything that is At this value, hot after idle it runs very well but the problem is the hot start, could someone help me Any opinions are welcome, I've been dealing with this for months

Can you upload your tune so it’s possible to see how it’s been modified so far?

I'm not able to post the file here, is there an email I can send it to?

It seems you're on the correct path by modifying IP_TI_CST, IP_TI_CAST, and IP_TI_TCO_WUP. However, is there a reason you didn't scale all of the proper fuel tables by your new injector scalar? It appears you only modified the fuel values for some of the temperature correction maps around warmer temps. Otherwise, the rest of the tables are completely stock.

See here for more details: https://www.ms4x.net/index.php?title=Si ... or_Scaling

Yes, I didn't modify them all because I'm learning to deal with it, I'm still going with caution, the abbreviations of the table names make me confused, but I'm getting used to it, one more question would be to use the voltage input of one of the post cat probes to input a 0 to 5v signal from a wb reader and have the value displayed in the log as a lambda value

I didn't find these tables

ip_ti_cast__tia__tco -
ip_ti_cr_cst__cyc__tco -
ip_ti_cr_cast__cyc__tco

Search for these instead and you'll find them:

• ip_ti_cast
• ip_ti_cr_cst
• ip_ti_cr_cast

I adjusted the start and start tables and it continues to shoot a lot of fuel at hot start, it only starts by pressing the accelerator pedal, I don't know what else to do with it

What about IP_TI_TCO_WUP? With this parameter, you can target a specific coolant temperature and perhaps dial it back a bit.

There is another similar parameter which may come into play called IP_TI_TCO_WUP_IS.

I'm going to make a log of the cold start and the hot start to see if you can identify where this high injector time is coming from, if I leave it set to start very cold it starts very hot, if I set it hot it doesn't start cold at all

Sorry, we can’t provide in-depth support for “how” to tune. We can provide insights, but ultimately the details are up to you. We do this for our protection as well as yours.

I found what could be causing this problem but I don't know how to solve it in the log I noticed that at startup the maf value goes up which is why the injection time is high, any tips on what could be causing this

The MAF reading only surges during a hot startup, but not during a cold startup?

both when cold and when hot, I have already changed it for 3 different brands of MAFs and I have the same problem