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View Full Version : need pfc base map! fouling plugs


sick kid
03-08-2012, 06:46 PM
Hi i just recently got my car running after upgrading to sti injectors, z32 maf, and pfc. Now my car is running so rich off the base map that it is fowling plugs and therefore i cant drive it anywhere to get it tuned. What should i do? Is there anyone that can give me a base map to drive my car to get tuned? I have to drive my car 2 and a half hours to get tuned...

Motor
96.5+ sr
fmic
z32 maf
subaru sti injectors
255lph fuel pump
pfc

any ideas?

Kingtal0n
03-08-2012, 07:27 PM
Yeah I have an idea.

I am thinking you have a commander handy.
Make sure the car has an oxygen sensor plugged in. Make sure closed loop is turned on.

Now, use the injector map to dial down the fuel evenly for every cylinder until the engine idles decently. This map is under settings, it has two rows, one with 100%, the other row has a latency like .00 or .02, .04, .06, etc... I am going from memory here fwiw

Cylinder 1-4 dial it back to around 85% or less. keep dialing it down until it runs decent.

Now, you should be able to drive the car somewhat. Do not boost.
Drive it slowly and carefully to highway speeds, I am guessing you need to take it on the highway. Invest in a narrowband gauge for the oxygen sensor, I believe you have a narrowband oxygen sensor? If you had a wideband this would be much easier.

During your highway drive, use the temporary adjustments for fuel, and dial it up and down until you see the narrowband gauge flipping between rich and lean. This is the crucial part of your long highway drive. If you can get the oxygen sensor to flip rich and lean, and let the ECU into closed loop control of the Air/Fuel ratios, then you will arrive at your destination with nice clean plugs and achieve good fuel economy. IIRC, the temporary adjusments are under "settings" and it says something like "INJ/IGN". It allows you to add temporary adjustments to fuel and timing to the entire map. Changes made here dissapear when you shut the engine off. Adjust the fuel in increments (.996, .992, etc...) Up or down until the oxygen sensor starts to flip rich and lean. thats why the narrowband gauge is so important. Barrow one if you have to. You CAN use a multimeter but it is an enormous hassle when they sell narrowband gauges locally at discount auto parts stores on the shelf.


Let me know where you neeed clarification and take pictures of anything you can to aid

sick kid
03-09-2012, 05:43 PM
that whole thing just sorta confused me...i have fc datalogit so i can adjust the maps on my computer so what your saying is to slowly lower the injector map evenly until the car idles decently?
the whole o2 sensor stuff is confusing, because i have 0 experience tuning cars

Kingtal0n
03-11-2012, 01:11 PM
that whole thing just sorta confused me...i have fc datalogit so i can adjust the maps on my computer so what your saying is to slowly lower the injector map evenly until the car idles decently?
the whole o2 sensor stuff is confusing, because i have 0 experience tuning cars

Send me your map and I will make changes for you, and or take screen shots to get you started.