Hi
I bought my my g35 and i had the spark plugs done at a local shop and he happened to clean my throttle body with some chemicals and when i got in tge car the rpm was all over the place and i took it to the dealer and it wont relearn the procedure so they told me to get new throttle bodies so i came home bought two used ones and took it back to the dealer and the same problem it wwouldnt relearn the procedure. I dont know what to do please help..

Azhar22 wrote:Hi
I bought my my g35 and i had the spark plugs done at a local shop and he happened to clean my throttle body with some chemicals and when i got in tge car the rpm was all over the place and i took it to the dealer and it wont relearn the procedure so they told me to get new throttle bodies so i came home bought two used ones and took it back to the dealer and the same problem it wwouldnt relearn the procedure. I dont know what to do please help..

Sorry to hear what happened. How many miles were on your G that prompted you to change the plugs?

They are good for 105k miles.

Why did you not return to the shop that touched the throttle body and asked them to fix it?

If you paid by credit card call the credit card company and request a charge back for poor workmanship.

Let the dealer fix it and let the shop that messed up your TB pay the bill

I've read too many of these type of posts over the years and I never let any independent shops touch my G

You get what you pay for in this world.

Just my $.02

Telcoman

Ive tried that but its not learning anything. What can be bad if its doing that

The timing of your procedure.

But the dealer couldnt even do it

Don't have an answer for you there. Do you have a check engine light on?

Azhar22 wrote:But the dealer couldnt even do it

Then it does sound like you have a different issue. As Mike asked are there any codes being produced?

i just recently did my spark plugs at 81k miles, i cleaned the throttle body while i was at it since it has to be moved to get the back spark plugs. My car started up fine, well better. I didnt have to do a idle relearn.

Only thing i could think is the sensor on the throttle body is damaged somehow, maybe not reseting the "butterfly" to the closed position anymore. id be checking connections to the throttle body, could be partially connected??? Then id assume the local tech used proper cleaner for your throttle body that evaperates, you just say "some chemical". else you got mostiure in the engine that needs to pass out maybe??

as a matter fact i did not disconnect the wires for my throttle bodies out of fear of breaking a wire or connector... good luck... id be talking to the local shop about this... not the dealer... im surprised the dealer even touched your car after you told them another shop messed your throttle bodies up...

Many of the folks that have been hanging out here for a while will remember when they started using throttle motors in 03. People would pry them open and touch them all the time and wonder why they would no longer work. Remember Jacko-somethingorother who was arguing with me that his mechanic has develop a way to cycle the key and lock the throttle open....ahh the good old days. Well fast forward 5 years to the G35x sedan which has many items on it that were similar to the 03 engine performance wise but the different intake structure and required use of the Consult III made minor but significant overall changes.

Throttle problems resulting from cleanings are becoming more and more rare but they do still happen. Let me just tell you the list of reasons the Idle Volume Learning Procedure will not complete is long...very long. If the heat or ac is on it will not complete. If there are a few pending codes, the someone has altered the base idle speed or idle timing position. It will not tell you why it will not complete it will never switch modes on the screen. The most common issue I see keeping these from completing is unmetered air getting into the throttle body. Check for air leaks after the mass airflow sensor and before the throttle body.

If there was only a P0507 (Idle learning) completing the process would change it to a past code and allow you to clear it. A vacuum leak probably won't trip a fault unless it is really bad.

I also did my spark plugs by taking off the throttle bodies instead of removing the manifold. After putting it all together, the idle would rev between 1k and 2k. Took it to the dealer and was told that their mechanics NEVER REMOVE THE THROTTLE BODIES from the manifold for just this reason. They put 2 new throttle bodies on, reset the computer and problem solved for a large amount of cash. Anyone want to buy a couple of used throttle bodies? That was the most expensive lesson learned since I was 14 and didn't prime the oil pump before starting a rebuilt engine.

Ugh....Soon as it warms up I get to tackle this in my G.