blz6662 Posted March 11, 2008 Share Posted March 11, 2008 Hi there Landy Loons Just aquired a new toy but have a few engine running problems! The beast is as follows: V5 states 1970 Series 11A (Truck Cab), rolling on 100" Range Rover chassis, Defender 90 front end. Engine - 3.9 9.35:1 CR Engine suffix - 47AxxxxxB (From Rimmer Bros info it'd from a Morgan +8!) LT77 5speed short stick. The engine has been fitted with a 470cfm Holley Truck Avenger Carb and sparks via the old black cap lucas points type dizzy. Here's the problems (not had a lot of time to play with it due to customers cars taking free time up) When I bought it, (it's been called BOB - Short for Beast of Bigsweir), anyway it was running very lean and popping and cracking through the minimal side exit exhaust and tickover was fast so just driving in the lanes in low gears no problem BUT get it on the road and no rev range or power so had to keep it at fast idle speeds. So the previous owner (of 3 weeks) was told it's the carb that needs setting-up which was bought new and only recently fitted. Having downloaded the manual I had a go at sorting the mixture (without a vac gauge) and got it running sweet and the altered the idle speed to a sensible setting. After driving it down my farm track for a mile it started to become erratic and cut-out then it would'nt start. Looked under the bonnet and in the inlet manifold valleys there was a pool of fuel! aagghh! - SO have I overfuelled it? / did the backfiring damage the power valve in the carb? / the fuel appears to be running down the secondaries vac unit operating rod therefor has the diaphragm gone? - I have started it since but it misses like a pig if I try to rev it. Sorry All this is a bit War and Piece but when its a new toy it could be anything. Finally there is NO Vac Pipe running from the dizzy to the carb connection - err eh! - should I fit one and see, there is no other vac advance 'trickery' fitted in place of the standard. Phew thats it- HELLLPPPP Please cheers Baden Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted March 11, 2008 Share Posted March 11, 2008 Holley / Weber carbs don't like vibration or slopes, even the fully marinised / off-road upgraded ones. I could never keep my Weber or Holley in tune for more than a week or two. If the carb is new & shiny I'd think about selling it on ebay and going EFi, but then I would say that Quote Link to comment Share on other sites More sharing options...
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