could my engine run like crap and wont go over 2000-3000 RPM if i would install an older engine with one of this timing sprocket with abunch off round holes diffrent than the original in my 2006 5.3... looks similar to this one but not the same and i know it dosent have all this holes on it more like a 1 piece round plate? well after i installed an older engine on my 2006 silverado with the cam sprocket im talking about it stating to do this things... once i turn the engine on it will rev. easily over 5k-6k RPM and once i let it idle and try to rev it again it wont even go past 3k RPM or 2k RPM's it sucks and with the peddle all the way down. it wont trow any codes checked that... & also i checked and swaped the coils, map, throttle body, crank sensor, wires, plugs, knock sensors, everything i can think off... fuel pressure steady at 55psi.... any one could it be this or the tune?


my original sprocket looks more like this...


new sprocket installed in the 2006 computer but old engine with EGR- dont know correct year on engine.

 

you are on the right track... if there is a sensor on the front timing chain cover then you need to have that top pictured sprocket installed.;..

 

If im not mistaken, you'll need the Gen3 to Gen4 coversion from lingenfelter or else nothing is gonna read right... The gen3 pcms still read like the LS1s...

 

correct bout the conversion. the cam sensor moved from the back of the block to the front cover. get the conversion kit. should have all you need to fix.