Switch throttle bodies from a sliver blade to gold back to sliver!

[BLU BYU]

Yes I was just told this the other day...tho I haven't had time to try it.

[BLU BYU]

https://www.lingenfelter.com/sites/l...le%20Learn.pdf

wanted to throw this out there too

[DrX]

There are differences in the TPS signal output ranges between the silver and gold blade throttle bodies. Firstly, the ECM expects a specific correlation between the 2 sensor signals. For both the gold and silver blade TBs, TPS1 and TPS2 move in opposite directions. On the gold blades both signals have very similar ranges, while on the silver blades one signal has a small offset. If you have codes after swapping to a non OE TB, you would have to change the expected signal ranges or the allowed % error between TPS1 and TPS2.

Secondly, the ECM correlates specific voltage values to % throttle opening. For example, if 4.0V is considered 100% and the blade hits the stop at 3.9V, it will not be able to achieve the desired 100% WOT position and P1516 will set (predicted TP != actual TP). A work around for this is to reduce the maximum throttle opening by a few % in the throttle response tables.

You do not have to change the throttle area scalar when swapping between gold and silver blade TBs if they are both 90mm.

If you are just going back to your original TB, you should not have to change anything other than to check that the throttle area scalar and other throttle calibration values are the stock values and that no one has messed with the throttle tables under engine diagnostics.

With both P2119 (blade does not return to resting position fast enough) and P1516(desired TP not equal to actual TP) on your stock TB, I would check for a sticking/rubbing throttle blade.

This has nothing to do with the MAF.

[joecar]

DrX, thanks for posting that info.