Tune went bad, help!!!
#31
TECH Regular
Thread Starter
Wait... did you pay him to tune the truck or not? I don't understand. What did you drop the truck off for?
Need more info on the dyno. What brand? Were the results reported as STD or SAE (corrected or uncorrected)?
Maybe 50 hp total with cam, headers, supporting mods, and good tune.
Need more info on the dyno. What brand? Were the results reported as STD or SAE (corrected or uncorrected)?
Maybe 50 hp total with cam, headers, supporting mods, and good tune.
#32
TECH Regular
Thread Starter
a guy at work just mentioned that if the positioning of the MAF sensor is not correct that that can affect performance. this true or untrue? there is an 05 silverado here at work with 75k miles on it that i can swap MAF sensors with and check the positioning if need be.
#33
TECH Regular
Thread Starter
ok i had the lead technician at my shop go on a test drive with me so i could duplicate the "pop" and reduced engine power message. i duplicated it and pulled the fault codes. p0103 and p1514. he said that the airflow tables in the tune are wrong just by going off of the test drive and codes. i talked to the tuner to have him send me a copy of the dyno sheet which i should have today or tomorrow. i also went and talked to another tuner about the issue and didnt say and names or businesses and the first person he asked who my truck was by was the person that did it. so i guess i will see what happens once i get the dyno sheet.
#34
TECH Regular
Thread Starter
i also switched MAF sensors with that one i mentioned that has 75k miles on it, and i did the switch before i took my lead tech on the test drive.
#36
Mod with training wheels
iTrader: (16)
a guy at work just mentioned that if the positioning of the MAF sensor is not correct that that can affect performance. this true or untrue? there is an 05 silverado here at work with 75k miles on it that i can swap MAF sensors with and check the positioning if need be.
#37
TECH Fanatic
iTrader: (3)
Wait... did you pay him to tune the truck or not? I don't understand. What did you drop the truck off for?
Need more info on the dyno. What brand? Were the results reported as STD or SAE (corrected or uncorrected)?
Maybe 50 hp total with cam, headers, supporting mods, and good tune.
Need more info on the dyno. What brand? Were the results reported as STD or SAE (corrected or uncorrected)?
Maybe 50 hp total with cam, headers, supporting mods, and good tune.
Silverado 100 Horsepower Performance gain on a budget
I would want to know how your fuel pressure and injector duty cycle is doing? You might need more fuel as has been mentioned. Bigger fuel pump and/or injectors may be needed.
#38
TECH Regular
Thread Starter
Yes, that is true. Can you post a picture of how your MAF is positioned? It is possible that the MAF is positioned so that it reads more air than is actually entering the engine and the tune was scaled to account for it. This can cause the MAF to max out and also trip the error in the airflow vs. TPS table due to calculated cylinder airmass being too high. Any good tuner should know this...but who knows. I have made mistakes more retarded than that before.
#39
TECH Regular
Thread Starter
Only 50hp from LTs intake tune and cam?! I won't throw around any more ricer math, but I will just leave this here....
Silverado 100 Horsepower Performance gain on a budget
I would want to know how your fuel pressure and injector duty cycle is doing? You might need more fuel as has been mentioned. Bigger fuel pump and/or injectors may be needed.
Silverado 100 Horsepower Performance gain on a budget
I would want to know how your fuel pressure and injector duty cycle is doing? You might need more fuel as has been mentioned. Bigger fuel pump and/or injectors may be needed.
#40
Mod with training wheels
iTrader: (16)
i checked the MAF position compared to a stock truck. i had it in the same position. then after i switched MAFs i put the new one on in the same position as it was on the stock truck. ive tried uploaded pics on here cuz as everyone knows they do wonders, but it wont let me. dont know if i dont have enough posts or am too new, not quite sure. maybe im going about it wrong lol. if i cant figure it out ill put up a link to them.