just got jet 2 issues

[Zygoat]

alright well i have yet to get a data run, been kinda busy. but i thought about it more and i don't think it makes any sense to change the g/s vs frequency table. i haven't changed mafs and there for the amount of air per frequency should still be the same.

ive been looking thought the tables a bit and i think maybe i need to change the g/s vs mode (closed loop). the only problem here is that it does it in open loop as well. so idk.

i have been running speed density (maf unplugged for about a week now) is there any way that this will damage the tranny?

[rat]

My maf table was way off after my cam. I tried cleaning the sensor, etc. I even tried a full size truck maf with full size maf tables, and those tables were off by quite a bit. I had to tweek them.

Don't worry about the numbers, airflow ducting, and a lot of factors go into the accuracy of the tables vs the real world. They are not absolute.

I ran without the maf for a while, didn't hurt anything. Now i have the vac modulator though.

[Zygoat]

so are you saying that it is still the frequency table. i don't see how that can change without a new maf. i do believe that it could fix my problem but i don't think it is the right way to do it. x airflow still = y frequency im just flowing more air now and need to figure out y the pcm is not compensating correctly.


don't take me the wrong way i really appreciate all of your help and insight. i just don't think it makes sense that the frequency table is my problem.

maybe i am understanding it incorrectly if that is the case please let me know.

thanks again for all of your help, and if you have any other ideas id love to hear them.

[rat]

If the fuel trims are off at a given frequency and airflow, then i don't see anything else that you could change.

It wouldn't hurt to check for vac leaks, exhaust leaks, a dirty maf. But after that if it is still off you are left with changing the table.

You can always go back to the old settings(you have your stock tune right?). I always read before i program. I save it as the date, 101807 would be today. Then i upload the calibration that i have been modifying, 32lbinjector happens to be the name of that. If the new cal is a step backwards i compare the downloaded file with the uploaded one to fix my cal i have been modifying.

[Zygoat]

yea i have everything backed up (the stock tune in triplicate). i cleaned my maf less than 6 months ago. i think the exhaust is good.(i know it is from the cat back cuz i just built all of that) can i just keep the car from going closed loop to check for exhaust leeks. how is that done? i believe i just have to raise the closed loop enable temp. as far as vac. where should i measure? is the map reading sufficient?( i don't have a vacuum gage, but i could buy one)

thanks again man.

[rat]

Vac leaks, they would be due to holes in hoses, bad gaskets, that kind of thing.

[Zygoat]

yea i know that but will the reading from the map be sufficient to check for problems?

[rat]

You would check for leaks by listening for sucking sounds. I have also heard you can use carb cleaner, but it is highly flamable, so do at your own risk. The map won't tell you anything, map readings can change with the weather.

[Zygoat]

propane is supposed to work really well.

[Zygoat]

ok well i got a couple of data runs in. had a little adventure first. went out to the car and hooked up the lappy and started recording data and setting everything up (while letting the car warm up). i then jumped out of the car to plug in the maf,it has been unplugged as i have been running speed density. so i plug it back in and close the hood and i hear ... click. my doors had locked. for whatever reason when i plugged the maf back in it triggered the computer to "re boot" i guess and it then locked the doors as it normally does after start up. locking me out. i have a spare set of keys that i keep on my house ring so that they are always separate. but that got locked in the car as well as my cell phone (as i was ready to pull away after hooking up the maf).so there i am standing outside my car with it running, hooked up to my laptop which is collecting data just fine, staring at the keys in the ignition, my spare keys and my cell phone. all i could think to my self is " i am so ****ed" the ONLY other spare set i have is at my parents house 80 miles away. so after pondering my fate for a few minutes. (i am pretty confident i could have picked the lock, but my tools were in the house and the keys to the house were locked in the dam truck.) i trudged to the front office of our apartment complex and asked rater embarrassedly if they had a phone book for the lock smith's number. called them up they came out. got the usual "lock your keys in your car?" routine and then he whipped out a little inflatable air bladder (that he wedged in the door seam to pry it open) so that he could insert a log metal rod and roll down my window. took him 90 seconds tops. i said thanks he took $50! of my dollars, and we parted ways. man i wish i could make that kind of money! i have NEVER locked my self out of ANY car. i maintain that i still haven't but i have now been locked out by a car.

with that ordeal out of the way, i was able to proceed. i went on a short run and it didn't seem any different then it did on sd. then i thought about it and cleared the trouble codes. in the middle of the second run. then it started to do its stumble thing again. i figure the first test is worthless except as a reference. but the second one is legit after i cleared the trouble codes. ill post it up. let me know what you see.

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