Straight six carb model was running well then slowly got slower and slower runs and starts ok but won't rev it's guys out responds slow Evin when manually reving on carb
macman26,
Jul 20, 8:22am
Check the vacuum advance diaphragm isn’t stuffed. Also check fuel delivery pressure and volume.
serf407,
Jul 20, 9:24am
Garbage in the petrol tank outlet area?
sr2,
Jul 20, 9:31am
If it's still starting and running smoothly I'd be surprised if it was a fueling issue. I'd be putting a timing light on it and checking the advance and retard first.
tim41,
Jul 20, 9:34am
as evin to speed up abit
the-lada-dude,
Jul 20, 11:17am
well that cuts out the throttle linkage, if it spits/ backfires through the carb > very late in the ig timing very lean or burnt intake valve, . check the valve lift or cam timing or hydraulic lifters are pumping up with shitty oil ?
neldo8,
Jul 20, 11:53am
Il check the advance and retard give it a new filter and oil C what happens
franc123,
Nov 17, 1:14pm
Pull the filter out of the carb top (assuming its still got the Weber ADM on it) and check the state of it, it lives behind a brass plug. Someone may of course have fitted an in line filter somewhere. If it's a wagon, ute or van rust in the fuel tank could be an issue by now, or maybe the fuel pump is just getting tired. If the pump isnt working well the pickup in the tank may well be gummed up. If all this seems OK a check to see the distributor advance isn't siezed if it's an early model would be a good idea.
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