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4.0 se pulling back

Range rover 4.0 SE, R reg (120k miles) auto. New leads, oil, plugs and air filter fitted two months ago.

Started today, felt like it was missing on one cylinder, very erratic tickover jumping between 300 and 600 rpm, Also at low speed pulling back, put foot to the floor and every thing ok over 30 mph.

any help or suggestions appreciated

Wayne

Reply to
wps
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Vacuum leak? Any pipes fallen off under the bonnet?

Reply to
EMB

In message , wps writes

Idle speed control valve?

Reply to
hugh

Possibly a Lambda probe gone?

Badger.

Reply to
Badger

Badger> Possibly a Lambda probe gone?

And my suggestion: crankshaft position sensor.

Check 'em all and you'll stand a good chance of finding the problem.

Andy

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Reply to
AndyC the WB

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