Leon idle problem - constant hunting when cold

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Thu 25 Oct 2018 18:31
Leon idle problem - constant hunting when cold - zacepi

Hi all,

Car is Seat Leon 1.6 TDI CR Ecomotive, 120,000 miles, 10 reg.

Just recently, and only when cold after being left overnight, the revs when idle jump between 400 and 800 and back again, over and over. Like it's about to stall, then recovers, then stall etc.

This goes on for about 15 minutes until the engine has warmed up, at which time the idling is fine around 900 rpm.

Know someone with a diagnostic tool, and the ECU reports no problems.

From looking around the forum I can see injectors or glow plugs may be the culprit (would have thought they would be reported in the ECU though). Any suggestions?

cheers

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Thu 25 Oct 2018 22:18
Leon idle problem - constant hunting when cold - elekie&a/c doctor

What diagnostic tool was used by someone you know?

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Fri 26 Oct 2018 16:23
Leon idle problem - constant hunting when cold - zacepi

Sorry no idea - he took it away and did it. Something between a multimeter and the large hadron collider I suspect.

Edited by zacepi on 26/10/2018 at 16:24

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