mikeb
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| posted on 3/9/09 at 11:08 AM |
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Ford 2.8 v6 lumpy idle and part throttle
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]
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Mr Whippy
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| posted on 3/9/09 at 11:34 AM |
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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.
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MikeRJ
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| posted on 3/9/09 at 12:10 PM |
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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]
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Mr Whippy
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| posted on 3/9/09 at 12:27 PM |
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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]
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britishtrident
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| posted on 3/9/09 at 02:20 PM |
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if it is a flap air flow meter it is not unknown for the pivot of the flap to stick
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MikeRJ
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| posted on 3/9/09 at 03:52 PM |
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quote:
Originally posted by Mr Whippy
I have the 2.8 v6 cologne too and that big cogs teeth are normally of brown plastic.
I've learned something new then! Surprised they stuck with this idea after the rather weak Essex design.
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britishtrident
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| posted on 3/9/09 at 04:00 PM |
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Last Colonge 2.8 engines used nylon like plastic timing wheels rather than fibre
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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stevec
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| posted on 3/9/09 at 04:08 PM |
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They are also known for inlet manifold gasket creep and leakage.
Steve
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