High idle

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sm57ruo
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High idle

Post by sm57ruo »

I am new to the forum, would like some enlightenment on the following;
I have a vw polo 2007 1.4 tdi, when I start the engine the car idles really high, up to about 1500 rpm?
Has anyone had the same problem?
Really need help on this
Thanks in advance
littlepolo
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Re: High idle

Post by littlepolo »

Does it settle to a normal idle after warmed up?

Any other problems while driving?

Could be the coolant temp sensor.
sm57ruo
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Re: High idle

Post by sm57ruo »

No it doesn't settle the idle is still high even when the car is started for a while
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alexperkins
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Re: High idle

Post by alexperkins »

Clean the throttle body, check the EGR isnt blocked, change the coolant temp sensor
littlepolo
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Re: High idle

Post by littlepolo »

Is a throttle body check/clean ever done as part of a dealer service routine?
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alexperkins
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Re: High idle

Post by alexperkins »

No sadly not
sm57ruo
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Re: High idle

Post by sm57ruo »

Could be a turbo or something to worry about?
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alexperkins
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Re: High idle

Post by alexperkins »

Very unlikely to be the turbo. Do what we’ve recommended and go from there
sm57ruo
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Re: High idle

Post by sm57ruo »

Quick update, haven’t changed anything as of yet, idle seems to come down just under 1000 rpm when driving for a bit
littlepolo
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Re: High idle

Post by littlepolo »

Just under 1000 is still high. Should be around 680-750 depending on engine type.
sm57ruo
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Re: High idle

Post by sm57ruo »

1.4 tdi
marshall2810
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Re: High idle

Post by marshall2810 »

Loose airbox/hose perhaps?
RUM4MO
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Re: High idle

Post by RUM4MO »

Try getting someone to check what the engine coolant temperature is claiming to be - or as suggested, just replace the engine coolant temperature sensor.
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