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P1514 trouble code and reduced engine power
My first post ever after having Hptuners for over a year, I hope someone can help me solve this issue!
I have tuned the truck from stock to now using the search function on this forum and thus never had the need to post. Every problem i have had has been resolved on this forum and it is always full of helpful information. That being said i have searched thoroughly, and though this topic has been covered i did not find a solution to the problem.
I have an 03 silverado ss, it has the p59 ecu. It has a turbo 408ci with cam, worked heads, and quite a bit more, it has a built trans, and really has been a fun vehicle to own and upgrade. Recently I went with a more efficient precision turbo, and used hptuners 2 bar OS vcm enhancement. i have been having the issue of a "reduced engine power" message coming onto my display, and a p1514 code coming into my DTC codes. this signifies that the amount of airflow and the tps sensor readings do not match, and that the engine is flowing too much air for the amount that the throttle body is opening. After reading some literature on this forum, i found some info saying to enlarge the values in the p1514 table in Hptuners, i have adjusted little by little with no success, and even completely maxed all the values in the table to 4.1, and i am still having the same problem. Other literature on hptuners forums says that i will need to scale my VE and IFR tables to overcome this issue, but i am at a standstill, if i need to do the scaling, what is the proper procedure? and will i need to scale other tables as well, including but not limited to my trans tables? I am not able to tune or drive about 4000 rpm because that is when this issue happens, and it happens every time. I have attached a copy of my tune in case you wanted to have a look.I have also attached a log file, and you can see where this happens at the very end of the log (my apologies for the 12 minute log time, i was logging afr error for the VE table) when the truck hit 3904rpm and almost 50% tps, but notice the cylinder airmass is at 2.34g even though i have the table in the tune maxed out to 4.1g. it happens at this rpm no matter how much throttle is applied. Thank you for your time, and i would genuinely appreciate any help that is given.
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