Not a big issue but I can't seem to get my 2.8 v6 on K-jet to idle consitantly below about 1300. it will idle lower but seems a bit lumpy. Also when cruising with virtually no throttle is feels lumpy also, lumpy or slightly missing every now and again I'm unsure but it is noticeable.
As soon as I open her up there is no hesitation just a good wollop of torque

I haven't changed the plugs or leads since the rebuild. Finally MOT'd her last week

Any thoughts, I did wonder whether anyone slipped a high lift cam in at a previoius point in her life (here's hoping)

Mike



[Edited on 3/9/09 by mikeb]

A lumpy idle on an older engine is sometimes due to a worn cam too. Its best to change out the original plastic toothed timing cog btw as they have a habit of stripping. Burton can supply an all metal one.

Do a compression check; a cylinder low on compression can drop out at low engine speeds and loads.

Mr Whippy, I though the fibre timing gear was only a problem on the old Essex engine?

[Edited on 3/9/09 by MikeRJ]

I have the 2.8 v6 cologne too and that big cogs teeth are normally of brown plastic.

Quote from Burton -

The 2.3 and 2.8 are significantly different since they feature Siamese ported heads, fibre-teeth cam gear and shorter stroke. In contrast, the 2.9s cam is chain driven in the opposite direction and features 3 port heads.

You can also get the cogs here -

linky

They are not straight cut so are not too loud



[Edited on 3/9/09 by Mr Whippy]

if it is a flap air flow meter it is not unknown for the pivot of the flap to stick

quote:

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Originally posted by Mr Whippy
I have the 2.8 v6 cologne too and that big cogs teeth are normally of brown plastic.

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Last Colonge 2.8 engines used nylon like plastic timing wheels rather than fibre

They are also known for inlet manifold gasket creep and leakage.
Steve