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vizlauk

Active Member

• Oct 30, 2015

• #1

im after a bit of advice regarding my autobox on my 52 plate disco, it is surging rather than changing gear when the throttle is fully pressed, kangerooing ! its ok if the throttle is incresed slowly ? any ideas

 

Brian S

Well-Known Member

• Oct 30, 2015

• #2

When was it last serviced, oil and filter change?

 

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eightinavee

Well-Known Member

• Oct 30, 2015

• #3

Its overboosting,usually a sticking wastegate,I cant be bothered to do a full explanation,do a search - there should be loads of info.

 

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vizlauk

Active Member

• Oct 31, 2015

• #4

Brian S said:

When was it last serviced, oil and filter change?

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As for a gearbox service oil & filter I'm not sure, but I've ordered the filter kit.

 

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vizlauk

Active Member

• Oct 31, 2015

• #5

eightinavee said:

Its overboosting,usually a sticking wastegate,I cant be bothered to do a full explanation,do a search - there should be loads of info.

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I don't think your on the right track, it's fine when it's been warmed up, it's more than likely the gearbox oil !

 

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eightinavee

Well-Known Member

• Oct 31, 2015

• #6

Why the bloody hell didn't you say it's fine when it's warm ? If you think its the gearbox oil why even ask in the first place ?

 

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vizlauk

Active Member

• Oct 31, 2015

• #7

eightinavee said:

Why the bloody hell didn't you say it's fine when it's warm ? If you think its the gearbox oil why even ask in the first place ?

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I'm wrong aswell, I had the wastegate checked at the garage this morning it was ok ! I have just finished changing the gearbox filter and oil _ the problem is exactly the same !

 

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vizlauk

Active Member

• Oct 31, 2015

• #8

Going try a new wastegate control unit on it and see if that is at fault

 

jamesmartin

Well-Known Member

• Oct 31, 2015

• #9

vizlauk said:

I'm wrong aswell, I had the wastegate checked at the garage this morning it was ok ! I have just finished changing the gearbox filter and oil _ the problem is exactly the same !

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what was the oil like

 

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vizlauk

Active Member

• Oct 31, 2015

• #10

jamesmartin said:

what was the oil like

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The oil didn't seem to bad at all, there was nothing on the magnet in the pan either

 

MJI

Well-Known Member

• Oct 31, 2015

• #11

Wastegates can stick when cold, what fault codes are on the engine?

 

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vizlauk

Active Member

• Oct 31, 2015

• #12

MJI said:

Wastegates can stick when cold, what fault codes are on the engine?

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I've never had it plugged in to anything to see if there are any fault codes showing, there is no warning lamps illuminated on the dashboard, I have just tried the waste gate control bypass and tried it down the motorway, it's still surging when throttled hard.

 

MJI

Well-Known Member

• Nov 1, 2015

• #13

vizlauk said:

I've never had it plugged in to anything to see if there are any fault codes showing, there is no warning lamps illuminated on the dashboard, I have just tried the waste gate control bypass and tried it down the motorway, it's still surging when throttled hard.

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Sounds like overboost

Put it on a code reader before you do anything else.

They are worth the £300 or so they cost

 

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Thor1950

Well-Known Member

• Nov 1, 2015

• #14

vizlauk said:

As for a gearbox service oil & filter I'm not sure, but I've ordered the filter kit.

Click to expand...

you will need to fill and drain 3 times to get fresh fluid in the torque converter

 

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Thor1950

Well-Known Member

• Nov 1, 2015

• #15

vizlauk said:

I've never had it plugged in to anything to see if there are any fault codes showing, there is no warning lamps illuminated on the dashboard, I have just tried the waste gate control bypass and tried it down the motorway, it's still surging when throttled hard.

Click to expand...

could be starving for fuel under full load. fuel filter change and make sure you are getting enough fuel. And how is the air filter. got to have both for a smooth running engine

 

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vizlauk

Active Member

• Nov 1, 2015

• #16

Fuel filter was renewed not long ago, as was the air filter, in starting to think this could be linked to the other problem it has with air in the fuel system ?

 

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vizlauk

Active Member

• Nov 16, 2015

• #17

Fault cured , faulty air flow meter !