Posted 01 November 2004 - 07:35 AM
Right I fitted a HIF 38 carb on a MG inlet yesterday to my 1275 metro engine since the old carb was beginning to give problems, and engine fired up quite nicely... At first there was black smoke EVERYWHERE, as the float chamber wasn't closing properly, so the whole carb came off and i fixed it.. after that ran quite nicely.
Using the idle speed screw i adjusted it as much as i could to about 850-900rpm, using an old Audi tachometer in the engine bay.. The problem now is the engine wanders up to about 1050 rpm every so often and back down... its really not running smoothly..
Can anybody help me figure this out?
Ignition seems fine since before that I had my weber and it idled smoothly (albeit at about 1600 rpm). I'll still probably be getting a electronic ignition set with new coil, leads, plugs etc.
Another problem I have is the connections to the HIF carb... there's at least 5 different nipples or take offs on it, and so far the only ones i have conected are the fuel line and the vacuum advance take off just before the inlet.. Can anybody clear up which of these should be connected where?
Posted 01 November 2004 - 10:50 AM
Posted 01 November 2004 - 11:27 AM
Also if there was an air leak wouldn' the engine rev quite a lot? It only changes RPM in minor increments and at pretty much regular intervals... vrrrr..drooom....vrrr...drrooom....vrr...drrooom!
Posted 01 November 2004 - 07:51 PM
HERE is Mr Keith Calver describing how to hook up an HIF SU properly. Hope this helps.
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