Emergency Need Ignition And Fuel Maps And Ignition/Fuel Correction Maps

[Drift King]

Help! Help!

Its nice how everyone is talking about ignition and fuel maps. But can someone actually help me locate, find and obtain stock base fuel, stock base timing and stock base fuel and timing correction maps.

The reason: I bought an Apexi Power FC ECU, and I've been trying to get my car to run on the Power FC ECU and not the stock ecu, however, every time I try cranking the engine to come on, it comes on and feel like its choking and the RPM doesn't move up to 1000rpm, as well as the stock boost gauge does not go up.

Its like this, you start your car, and your car start to warm up and slowly idle after awhile, but I never reach the Idleing because it keeps on choking.

So therefore I talked to a few Apexi dealers for instance: Adrenaline Motorsports in Missouri, and Dynamic Motorsports in Cali, whom inform me that I need to obtain the stock base Fuel and Timing along with the Correction maps for Fuel and Timing and input it into the FC Commander hand held to be able to crank up the engine.

Now if anyone can help be obtain actual numbers numbers that I can input it in, would really be appreciated, and yes i know i risk the matter of blowing up my motor or killing it, but with guidince would really be nice and help me tune my car right.

Thanks!

I'm like this with the ECU now ------>

 

[kenamond]

Best I can do is the link below. It's been renamed with a pdf extension so that the forum would let him upload it, but it's an Excel spreadsheet (just rename it to a .xls file).

http://www.dsmtuners.com/forums/151280193-post11.html

 

[Drift King]

Which is which, there are two table

Which table is ignition, which table is injection and what of the ignition/injection fuel correction.

Thanks though, I really appreciate the help, but if you can tell me which is which would be nice.

Thanks.

 

[Drift King]

The data say at 1800 ft, how would be able to figure if that will make any difference on how my car will run.

 

[kenamond]

Which is which, there are two table

Which table is ignition, which table is injection and what of the ignition/injection fuel correction.

Thanks though, I really appreciate the help, but if you can tell me which is which would be nice.

Thanks.

I can't open that file right now, but you can tell by looking at the map data. The one with 0s in certain cells is the timing map. The other is the fuel map. I don't know about correction maps. As far as I know, there is no correction map, but there may be one. Timing is adjusted "on the fly" from knock sensor output, coolant temperature, and intake air temperature. Fuel is read from the map and corrected based on short-term and long-term fuel trims. Other than that, the ECU uses the maps. When the ECU is in closed loop mode, it uses the fuel map and STFT+LTFT to compute injector pulse width, and the STFT is computed via feedback from the O2 sensor. If conditions are adequate, it enters learn mode and moves STFT trims to LTFT lo or mid trims. In open loop mode, it uses the raw fuel map.

The timing map will be corrected if you're knocking (there's a formula for computing retard for a given knock count). If your coolant temps are too high or too low, it pulls more timing. If your IATs are too high, it pulls timing. Other than that, it goes off the timing map.

And the fuel map is based on stock injector size and base fuel pressure. If you change either of those, the fuel map is incorrect.

The elevation probably doesn't make too much of a difference. The tables are in terms of load (grams of air per intake stroke of one cylinder), and elevation doesn't matter as long as the MAS computes the correct airflow and the CAS/CPS computes the correct rpm. You convert from MAS airflow (lb/min) to load (g/rev) by multiplying airflow by 454 and dividing by rpm. Then you look on the maps at the given load and rpm to pick off an AFR or timing advance.

I could go on, but you might want to do some searching if you have basic questions about what I've said.