mad4x4
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| posted on 12/8/05 at 07:48 PM |
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Dellorto carbs - Back firing
Having trouble getting my twin 40's set Currently its firing out of the carbs (cyc1) and flames out the exhaust and balck smoke (rich).
If I screw down the micture engine rev's don't change just can't get the engine to run lean enough
Engine 1.6CVH (xr2)
Ingintion - Ford Xr2
Carbs twin 40 dellortos ( venturi unknow jet unkwnow)
Scot's do it better in Kilts.
MK INDY's Don't Self Centre Regardless of MK Setting !
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stevebubs
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| posted on 12/8/05 at 08:07 PM |
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Start here....
http://members.aol.com/dvandrews/dellorto.htm
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stevebubs
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| posted on 12/8/05 at 08:08 PM |
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If you remove the jets and venturis then you should be able to see the markings.
Also check fuel pressure and floats
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rayward
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| posted on 12/8/05 at 08:21 PM |
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i had a similar backfiring problem(out of carbs+exhaust), turned out to be a dodgy rotor arm, maybe worth checking
Ray
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scutter
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| posted on 14/8/05 at 05:53 PM |
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I had this problem out from my Delortto's, sounds like the mixture drillings are blocked.
Remove both the mixture screw and the idle jet and holder, take a piece of silicon hose and blow down the mixture screw hole to see if you can get any
crud back into the float chamber.(rough i know but worked for me, don't forget to clean out the float chamber afterwards or you'll just
suck the crud back into the jets).
That should sort out the rough running, as for the spitting back sound like a ignition timing problem.
ATB Dan.
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