Throttle sticks for a nanosecond while changing gear

Throttle sticks for a nanosecond while changing gear was created by Hogweed

Posted 6 years 2 months ago #187754
Been driving my little red car for a while now, and I have to say I really enjoy it – it’s FUN. But, as with any car, I’m starting to notice the niggles, and not sure which of them might be faults, and which “They all do that, Sir”.

When I change gear, the engine revs momentarily when I lift my foot off the throttle and declutch. I find this moderately annoying. Now, on some other cars I’ve driven (eg Ford Focus – early 2000’s petrol and diesel), they all do it, as far as I can tell – so, to me, it's a design fault, and there’s nothing I can do about it.

Does the TF (2005 model) do it too, or do I have a fault?
Thanks :D
by Hogweed

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Replied by SundanceUK on topic Throttle sticks for a nanosecond while changing gear

Posted 6 years 2 months ago #187757
Sounds like it is either a sticky throttle cable, or more likely a sticky clutch release arm, causing the revs to jump a bit.
A good lubrication - which can take a while to sink in can help.
Other than that you will be looking at a sticky IACV valve (Idle air control valve) which determines the air mixture on lower revs.
One final and easy one to try is a throttle position reset, which re-calibrates your accelerator and has helped when tickover is high.
IACV reset is on a you tube vid somewhere and described in the how to section on here.

Sundance
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Replied by Hogweed on topic Throttle sticks for a nanosecond while changing gear

Posted 6 years 2 months ago #187759

SundanceUK wrote: Sounds like it is either a sticky throttle cable, or more likely a sticky clutch release arm, causing the revs to jump a bit.
A good lubrication - which can take a while to sink in can help.
Other than that you will be looking at a sticky IACV valve (Idle air control valve) which determines the air mixture on lower revs.
One final and easy one to try is a throttle position reset, which re-calibrates your accelerator and has helped when tickover is high.
IACV reset is on a you tube vid somewhere and described in the how to section on here.

Sundance


Thanks. So they don’t normally do it then?

Wow – didn’t know we still had IACVs – thought they went out in the early 90’s. Or am I getting confused… (definitely). I'll have a look at the guide.

Tickover’s fine though ;)
by Hogweed

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Replied by talkingcars on topic Throttle sticks for a nanosecond while changing gear

Posted 6 years 2 months ago #187761

Hogweed wrote: ……...Wow – didn’t know we still had IACVs – thought they went out in the early 90’s. Or am I getting confused…


The basic design dates back to the mid '90s.


Home to black Alfa Romeo 159 3.2 V6 Q4 ,green MGF VVC and red MG Maestro T16.

MG - the friendly marque.

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Replied by Hogweed on topic Throttle sticks for a nanosecond while changing gear

Posted 6 years 2 months ago #187764

talkingcars wrote: The basic design dates back to the mid '90s.


Ah, OK :) I don't think it's displaying those symptoms though - I remember it all from my 325i back then.

Thing is, on the Fords, it's a design thing (map or something), not a sticky cable etc, and this feels exactly the same - maybe I'm just over-sensitive to it, and nobody else notices...
by Hogweed

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Replied by sworkscooper on topic Throttle sticks for a nanosecond while changing gear

Posted 6 years 2 months ago #187772
Hi . My 05 TF doesn't do it .:nonod:
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