Engine misfire

[blukey]

Hi
I have a 2001 1.9d van that is missing/surging when running at a constant speed, I have changed fuel filter, air filter maf sensor its got a new egr valve but although improved its still there especially when the engine is warm, would welcome any ideas
Thanks
Blukey

[Ol'Jeffers]

Injector pump/throttle linkage out of adjustment?

[ron]

Try running some Millers fuel cleaner through it.alut: