Thoroughly cleaning the edges and pivot points of the TB blades has worked for others who had engine idle problems.Hi.
To summarize, I was suffering with an uneven idle on my 2006 GT when I turned on the AC so I very carefully cleaned the MAF & throttle body with CRC products.
After reassembling everything when I started the engine it shot up to about 3000rpm & then hung at whatever RPM I changed gear at (it is a 5-speed).
I have disconnected the battery overnight to try & 're-set' the engine management system.
Now when started it revs to 2000-2200 rpm (which seem a bit high for a cold engine) & then slowly falls to about 1000 rpm (takes about 20 seconds).
The revs seem to hang a bit when changing gear & it takes longer for the revs to fall back down when stopped in neutral (dropping initially to 1000 rpm & then down to about 750).
I have a drop in K&N air filter, but other than that the car is stock.
Previously (before cleaning the MAF & TB) when starting revs would jump to 1500 & fall back quickly. Also revs would fall quickly between gear changes, & the rev counter would drop quickly when the engine was turned off.
My gut feeling is that something isn't right after cleaning the MAF & TB, but maybe everything is OK & I'm just not used to how the car is supposed to act.
Have taken the vehicle to a local dealer for a reflash (made no difference, if anything worse). Took it back for a detailed investigation & was told everything was OK, although TB was slow to react (but not enough for replacement). Also told to replace K&N drop in air filter with a paper element.
Fed up with being charged an arm & leg to be told that everthing is OK, when it isn't.
Thinking about replacing the TB, although this is probably another expensive waste of time & money.
Does anyone have any other ideas on what could be wrong & how to fix it?
Also, did you disassemble the TB, or just remove it from the intake? If the former, then it may not have been properly reassembled.