TD5 Surging under heavy accelleration

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Tyrone Disco

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2000 Discovery TD5 auto surging when you floor it from low revs. Have replaced fuel filter and used injector cleaners but no better. Drive steady it's fine up till 2500RPM then flat with no torque beyond. Any ideas welcome.
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no. just checked inlet pipe to turbo and small pipes to wastegate actuator and all clear, also arm to wastegate moving freely but still. I'm assuming this is normal. no lights on dash at all so debating spending the money to put on diagnostics ?
 
Tyrone Disco said:
2000 Discovery TD5 auto surging when you floor it from low revs. Have replaced fuel filter and used injector cleaners but no better. Drive steady it's fine up till 2500RPM then flat with no torque beyond. Any ideas welcome.
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Click to expand...
Its overboosting,simple as that.Most likely the wastegate sticking on the turbo,or the modulator solenoid has failed or one of the little pressure pipes has blown off.
The engine ecu cuts fuelling when it see's more than about 230Kpa,so the power drops,and so does the boost.Then it restores fuel till it overboosts etc,etc.
 
To answer both questions above. Omagh N.Ireland, and the small pipes are fine, I've had them all off and clean rge aire intake pipe and the 90degree block on tiop of the pipe from the engine breather.
How do you check if it's the wastegate sticking or the modulator solenoid ?
 
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