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Turbo Timer And Low Idle?

pac34r

By pac34r,
in General Maintenance

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pac34r Enthusiast

pac34r

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Posted (edited)

Hi all. So lately I've had a rough idle. So I've done the following from my searches on the forum

  • spark plugs and coils (splitfire)
  • cleaned AFM and pod
  • cleaned throttle body

Idle still the same. But yet to clean AAC

But my main issue is when the turbo timer kicks in the idle drops to a bit over 500. My uneducated guess is the computer is trying to process that the key is our of the ignition (trying to reduce revs) and timer is trying to keep engine on (increase revs) so the revs are meeting in the middle and bouncing up and down? Also my exhaust sound has a slight bob bob bob bob sound don't know if that would be related?

The idle doesn't sound healthy for the engine. Feels and sounds like the pistons are knocking side to side as the idle is that low.

Let me know what you guys think and feel free to ask me questions if I've missed anything out. If possible I will try and get a video for you guys.

This is my timer aswell. Some crap that came with it when it was imported.

post-86372-0-32031300-1314626724_thumb.jpg

Edited by pac34r
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89CAL Grand Master

89CAL

Posted
Posted

Hi all. So lately I've had a rough idle. So I've done the following from my searches on the forum

  • spark plugs and coils (splitfire)
  • cleaned AFM and pod
  • cleaned throttle body

Idle still the same. But yet to clean AAC

But my main issue is when the turbo timer kicks in the idle drops to a bit over 500. My uneducated guess is the computer is trying to process that the key is our of the ignition (trying to reduce revs) and timer is trying to keep engine on (increase revs) so the revs are meeting in the middle and bouncing up and down? Also my exhaust sound has a slight bob bob bob bob sound don't know if that would be related?

The idle doesn't sound healthy for the engine. Feels and sounds like the pistons are knocking side to side as the idle is that low.

Let me know what you guys think and feel free to ask me questions if I've missed anything out. If possible I will try and get a video for you guys.

This is my timer aswell. Some crap that came with it when it was imported.

ECU's do not try and slow the revs down as you put it when the key is switched off. They stop fueling and sparking so the engine stops. ECU's primary job is to meet targets so it will want to reach a target RPM but something isn't letting it.

I would check the wiring to the turbo timer. As its only doing it with the turbo timer on the fault probably lies there

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