LS2 Intake manifold and LS7 maf swap thread
04-18-2016, 03:38 PM
#63
Right, I did go back and rewire it again this morning and the throttle position and desired throttle position in HPT now match up correctly. However I do not have a TN colored wire at PIN C on my oem connector, i ahve RD/BLK. However I followed the same pinout setup and ignored the colors. I think that if it was wired improperly it wouldnt even drive at part throttle.
04-18-2016, 09:11 PM
#65
Well, it is binding, but appears to be internally binding. Seems to be random, and only above a certain point, thats why WOT triggers it. As it comes back to close, it seems to get stuck about 3/4 of the way momentarily and jitters its way back closed.
04-18-2016, 11:48 PM
#66
found some important diagnostic info about the codes, this explains why when I test the TB sometimes i get P2101 by itself and sometimes I get that and P1516.
P1516
The indicated throttle position does not match the predicted throttle position for more than 0.5 second.
P2101
The indicated throttle position does not match the predicted throttle position for more than 0.3 second.
P2119
The ECM determines that the throttle blade did not return to the rest position within 720 milliseconds.
P2176
The difference between the predicted and the actual throttle position is more than a calibrated amount for more than 1.5 seconds.
P1516
The indicated throttle position does not match the predicted throttle position for more than 0.5 second.
P2101
The indicated throttle position does not match the predicted throttle position for more than 0.3 second.
P2119
The ECM determines that the throttle blade did not return to the rest position within 720 milliseconds.
P2176
The difference between the predicted and the actual throttle position is more than a calibrated amount for more than 1.5 seconds.
04-20-2016, 11:42 AM
#68
still waiting on the throttle body to arrive to replace it, but here are some updated pics
this is my new vacuum setup for the purge solenoid and brake booster hose, 3/8" T fitting and a 1/2 to 3/8 heater hose adapter all connected to the quick disconnect port on the intake. This way I dont have to continue chopping fittings off.
my previous crankcase vent setup that I used on the LS4 manifold has switched sides, i still need to put some sort of breather filter on the rear valve cover where it brings in fresh air.
here is the new 60* intake elbow from silicone intakes, much better fit then the 45* even the one that came with the airbox never fit this well. Now the maf adapter section goes straight into the airbox instead of sideways. I have a airraid composite maf adapter on the way in an attempt to see if i can get better IAT's. Although I believe it has more to do with heatsoak in general of the intake and throttle body. I will be ordering insulation wrap for the intake and one of these... which will be wrapped around the crossover pipe on top of the already existing heat wrap.
this is my new vacuum setup for the purge solenoid and brake booster hose, 3/8" T fitting and a 1/2 to 3/8 heater hose adapter all connected to the quick disconnect port on the intake. This way I dont have to continue chopping fittings off.
my previous crankcase vent setup that I used on the LS4 manifold has switched sides, i still need to put some sort of breather filter on the rear valve cover where it brings in fresh air.
here is the new 60* intake elbow from silicone intakes, much better fit then the 45* even the one that came with the airbox never fit this well. Now the maf adapter section goes straight into the airbox instead of sideways. I have a airraid composite maf adapter on the way in an attempt to see if i can get better IAT's. Although I believe it has more to do with heatsoak in general of the intake and throttle body. I will be ordering insulation wrap for the intake and one of these... which will be wrapped around the crossover pipe on top of the already existing heat wrap.
04-20-2016, 06:13 PM
#74
chcked some more service manuals, looks like the limit is 4.38v or 88% absolute throttle position. So seems to be fine, im putting in an order for an LS2 silver blade, hopefully that solves the problem. Shame though the LS3 throttle body does make a nice whistle.
04-20-2016, 06:20 PM
#77
HPT is just reading the outputs, as far as I can tell the TPS sensors are accurate, seems to be the ECM thats confused. I have a feeling its the reversed rotation that's mixing it up. If it does this with the LS2 throttle body, ill be totally lost about how to fix this.
