05gmcsierra

iTrader: (3)

so now i c that its doing it at high speeds everytime at wot.. so i decided to log the truck.. these are 2 logs of when i get check engine light, and reduced engine power with code p1516.. can anyone tell reason for this? attached are logs.. thanks for any help available..

05gmcsierra

iTrader: (3)

anyone else ever had this problem? after some reading looks like it might b the tb.. ill b changing it out soon and c what happens..

Luke03

iTrader: (7)

Are you still having this problem? If not what did you do to fix it?

05gmcsierra

iTrader: (3)

I switched my TB ..the tb was the issue

Luke03

iTrader: (7)

Thanks

Gadgetized

iTrader: (9)

I was also having this problem. I had an 87mm truck TB, and was getting P1516. I was told to try a different TB, so I bought an LS3 TB off of Ebay new. I then got P2101. I have tried everythign to get rid of P2101 with no luck. I ended up putting my 87mm truck TB back on, and messing with the tune. After spending quite a bit of time on it I have not had P1516 in quite a while. I think it is mainly because the TB isnt physically opening up 100%. Like in your first log, you are only maxing out at 98%. I changed that in the tune, and disabled some stuff in the tune, and it has worked. If someone is using EFILive, I would be happy to look at a tune and a log for them.

05gmcsierra

iTrader: (3)

well i havent had that code shoot up in like 2 weeks.. altho last week i didnt really drive the truck.. i changed the 87mm tbss to a ls2 90mm and adjusted the xlink acordingly .. and yea i was only getting 98% on my 87mm and now i only get 97.4 i belive..lol funny stuff..