My 2005 Yukon XL

[dbrannon79]

From what I recall, once it's been cleaned and reinstalled, you will need to connect the scanner and reset the ECM so it will "re-learn" the engine. I was told this a few years ago that the ECM will over time compensate for the build up and adjust how it runs. I had one that was so bad that after I cleaned it, the engine wouldn't run right. kept stalling at idle. even though there was no codes on the ECM, after resetting it, it ran like it was new again!

 

[DieselSlug]

Be sure to clean out any ports or jets in the throttle body. also in the area of the IAT valve.

Only port in the throttle seems to be PCV valve and fuel tank purge line. Really the most simple one I've messed with!

My understanding the IAT on the 5.3l is in the MAF housing. I actually cleaned the MAF with proper cleaner at couple weeks back, it was super easy to do at the time.

From what I recall, once it's been cleaned and reinstalled, you will need to connect the scanner and reset the ECM so it will "re-learn" the engine. I was told this a few years ago that the ECM will over time compensate for the build up and adjust how it runs. I had one that was so bad that after I cleaned it, the engine wouldn't run right. kept stalling at idle. even though there was no codes on the ECM, after resetting it, it ran like it was new again!

You are correct, since I don't have a proper bi-directional scanner I will need to force a reset by disconnecting power for a while. It will eventually learn on its own, but with a reset it should learn faster.

Times like these, I wish I just got a gmt400 for simplicity! I'd really like a late 80s Suburban, but that's non-existent here. And I couldn't bring myself to drive it in the winter.

 

[jrsavoie]

Only port in the throttle seems to be PCV valve and fuel tank purge line. Really the most simple one I've messed with!

My understanding the IAT on the 5.3l is in the MAF housing. I actually cleaned the MAF with proper cleaner at couple weeks back, it was super easy to do at the time.

You are correct, since I don't have a proper bi-directional scanner I will need to force a reset by disconnecting power for a while. It will eventually learn on its own, but with a reset it should learn faster.

Times like these, I wish I just got a gmt400 for simplicity! I'd really like a late 80s Suburban, but that's non-existent here. And I couldn't bring myself to drive it in the winter.

That was my favorite years of Suburbans