Poor throttle response. Need help!

[gazl2006]

Hi

I’ve just bought a 2006 350Z convertible and driven it for a week and noticed the throttle is throttling down far too slowly when in cold or warm running.

 

When I rev up in neutral, the throttle response is quick and responsive but the revs don’t die quickly and take around 2-3 seconds to return to idle. Other than the throttle, the car runs smooth and there is no knocking noise when idling. I know the previous owner replaced the battery and wondered whether the throttle body needed re-programming or cleaning because it may be sticking.

 

What are your thoughts? Any ideas what this could be and is it going to cost me loads?

 

Regards, Gaz

[Richf]

I'd try a throttle reset , search for the "pedal dance" there is a good guide on here

[veeg33]

^^ as above, try the pedal dance --> http://www.350z-uk.com/topic/53148-how-to-ecu-accelerator-pedal-throttle-valve-resets/

[gazl2006]

Thanks guys for the feedback the reset process.

 

I’ve also found a ProTech video on YouTube with the re-learn procedure:

 

I’ll give it a go this weekend and update this post with the results

[gazl2006]

@veeg33 and @ Richf@H-Dev

 

I did the first “ECU Resetting Procedures†followed by the “Accelerator Pedal Release Position Learning†which went to plan. I followed the “Throttle Valve Closed Position Learning†procedure but didn’t hear the throttle valve move during the 10 seconds wait time.

 

I tried this a couple of times; when turning on for 2 seconds I hear what sounds like the fuel pump turning on, but when I turn off, I don’t get a click or any sound.

 

I didn’t try the “Idle Air Volume Learning (Throttle Position Learning)†because the Throttle Valve Closed learning was a prerequisite

 

What are your thoughts? Does the throttle body need cleaning?

[Richf]

Its probably worth giving it a clean , how many miles has it done? You should do a complete reset again after you refit it