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Strange noise and power increase....


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Firstly a little bit about my 90:

2000 TD5

EGR removed

Remapped ECU by  Mastak and boost turned up to 22psi

149k miles

No active fault codes

 

The problem mainly happens when the engine is cold, and doesn't happen all the time.

 

On start up everything sounds normal, car idles fine. I'll pull out of a junction, and the 90 will pull a lot harder and accelerate a lot more than normal, but makes a strange noise as if there is a blockage somewhere on the intake side.

I thought maybe the wastegate was sticking but this is free.

The only other thing I've noticed is the throttle seems to 'stick on' for a couple of seconds after lift off, but I can't see the two problems relating.

Im a bit stuck as what to look for now.

Any suggestions ?

 

Cheers

Toby

 

 

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