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Just Had A Turbo Back 3" Exhaust Fitted

With A Ces Dump Pipe And Mandrel 3" Full

System With A Cat And 1 Muffler At The Back

And When We Started It Up The Idle Was

Up Near 2000rpm Solid And Then

Started To Fluctuate Up And Down Between

900 And 2000rpm, Its Like An Idle Control

Problem But It Was Fine Before The Exhaust

Was Fitted,

Any Ideas???????

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https://www.sau.com.au/forums/topic/74972-new-exhaustbad-idle-or-r32-gtst/
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First bet would be to check AFM as this will produce symptoms like you described and is easy to get to. It's a hard one to diagnose without looking at it myself but next step after that you could try checking all connections on AFM, TPS, Ignition module, cam angle sensor. After that I would try pulling an error code if it logged one. Go back to the shop that did it and ask to see their electronics protection device that they use when welding. Remember not to ring them and ask as they are easy to buy or borrow from somewhere else. Just go in and surprise them.

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