got a TC for my 96 Z and I need to richen the idle to start with, I have tried several things and nothing works, changed the MAF sensor no change, tried changing the VE nothing happens, would someone please help me on this tuning, also down loaded VE master and unable to get it to work.
383, afr heads, 1.6 rockers, 42#, 58mm tb long tubes. run lean from idle up.
I must be doing something wrong with TC or not hitting the right areas.

 

Ve master will not help you very much if you run with the maf (hit or miss there). You should still tune speed density though imo.

You cannot richen the idle in closed loop. The o2 sensors are in control of that.

What do you mean lean everywhere?

What exactly are you trying to fix here? Describe the problem?

Post a log.

 

Have you calibrated the MAF? I had the same probem when I went to ported heads: rich at idle and then lean everywhere else. Just got to put the time into getting the MAF tables correct.

If you want, send me an PM with your email and I will send you my excel spreadsheet I use to calibrate.

 

OK seem to have idle under control now, but wot is reading 10.7 on the wide band, any ideas how to lean this up, trims look good, no codes, cruise is good,
but wot is way rich. I tried and zero out the % change to afr at rpm and for coolant also, no change. I set open loop AFR vs coolant to 13.5 no help.
injectors are 42# and set to 44's. any ideas what I have done wrong or what I need to change.

 

Apply blm locker to your tune if they are not showing 128 at wot conditions and even if they are its a good idea.

You need to alter pe vs coolant value if you're that far off everywhere. Reduce the numbers in this table in the upper end, right now they will be 15.6 or something like that in several cells. Fine tune it with pe vs rpm to get a flat curve.

Open loop target a/f will have nothing to do with it if you're in closed loop mode. Make sure you're in closed loop before while trying to tune.

 

Ok call me what ever but I am learning slowly, but my TC does not have BLM locker, it has BLM min which is set at 108 and max set at 160, a BLM cell map boundaries table set at low-70, mid-60, high-55 and blm CELL RPM boundaries table set at low-1000, mid-1500, high-2000. I do not find anything with 128 for blm unless you talking about the min / max setting under fuel parameters. also have blm cell map boundary hysteresis set at 2 kpa and blm cell rpm boundary hysteresis set at 100 rpm.
thanks for any help.

 

http://www3.telus.net/bunker/tunes/

On this list is the BLM locker program.

You are going to have to do some reading up to learn tuning yourself. I have probably put over 100 hours in just learning (not even counting the many tunes I have done) and still I have many holes in my knowledge.

Make sure you are in closed loop before tuning. It will take like 3 minutes to get into closed loop once you start the engine.

 

How old/used is your MAF sensor?

I have seen them cause no end of troubles, from being dirty, to being faulty, to being an aftermarket brand and requiring a much different calibration than stock. Consider getting a new one if yours is old and you've ruled out the other possibilities like ignition/O2 sensors.

 

get this, the car is lean at idle, cruises good about 14.7 runs good, now at wot the wide band goes to 10.7 starting surging, the 02's go to 950mv, now I have tried to tune down the wot % but no luck, the MAF is fairly new and clean, I have TC and not been able to get the wot correct, everything I have tried failed, ltft and stft are real close, no codes, injectors are #42 and set for 48# this did not help, am working with the MAF tables now to see if it helps. any ideas anyone??

 

96 Z28, get this, the car is lean at idle, cruises good about 14.7 runs good, now at wot the wide band goes to 10.7 starting surging, the 02's go to 950mv, now I have tried to tune down the wot % but no luck, the MAF is fairly new and clean, I have TC and not been able to get the wot correct, everything I have tried failed, ltft and stft are real close, no codes, injectors are #42 and set for 48# this did not help, am working with the MAF tables now to see if it helps. any ideas anyone??

 

It could be your MAF sensor just needs fine-tuned on the top-end, yes. I've seen that with several. The best way to tell is to either do some WOT runs with PE mode disabled (so BLMs still change), and if your BLMs are lower than 128, then lower the MAF tables in the appropriate airflow range. That does entail the risk of running near 14.7:1 at WOT while you're logging.

The other way is to run a wide-band sensor at WOT and see how far off your real AFR is from the commanded value in the tune. Then you can use the difference to tune your MAF tables in the appropriate airflow range (lower if real AFR is richer than commanded, higher if AFR is leaner than tune commands).

Any chance your fuel pump is on its way out? Did you run it out of fuel recently?

 

How much are you changing the %wot tables. Each 1.0 is 1% less enrichment. Setting your fuel injectors from 42 - 48 should have leaned the thing out 12.5%. Something is very fishy here.


What kind of grams/sec are you seeing at wot?

What kind of values are in the wot tables?

Dont just tell us about how its acting post the logs, people with more experience will see things you might not and will probably interpret things differently.

If you have the blm locker applied and it is still doing this then something is really off with the tune or from a sensor. If you do not have it applied any sort of vacuum or exhaust leak is going to have you chasing your tail.

If your wideband is stuck up the tailpipe and not installed in a bung near the headers, I am not suprised it is showing lean all over except wot.

 

I'll have to get back to you on the logs, trying to find a program that will work, scanlxelm is suppose to work, but they sent me the wrong hardware. not too many out there for 96z that I have found that's not over priced.

 

tts datamaster will let you take 20 logs for free iirc. forgot you were dealing with obd2

 

checked web page for tts datamaster, but does not cover 96 z28, any others out there.