Club 80-90 Forums

Drove to Tatton Park today without a hitch. Stuck in the traffic trying to get out for about 1hr. Finally got out, pulled away and the van started to mis-fire. Did this all the way home, but I noted that it was mainly when the van was under load ie when pulling off or going up hills. The van revs up OK so I think its not fuel blockage. Any ideas?

1.9 DG 1989

I replaced the dirty fuel filter in case there was a problem with this. No difference. Dont know whether to run van with alternate 1-4 plugs disconnected to see if its a problem with one particular cylinder. Is this a good way to find out which is causing the mis-fire?

Not really, unless it's obviously running on 3 which is not a misfire per se but a dud cylinder..

When were these vans last serviced?

Drove to Tatton Park today without a hitch. Stuck in the traffic trying to get out for about 1hr. Finally got out, pulled away and the van started to mis-fire. Did this all the way home, but I noted that it was mainly when the van was under load ie when pulling off or going up hills. The van revs up OK so I think its not fuel blockage. Any ideas?

This one sounds like a plug or spark problem, fouled due to oily idling, or whiskered up.. revving up under load no-load doesn't tell you a lot generally, unless it really does rev quickly and cleanly to max revs, but even then has little bearing of consitions under load

start by checking all obvious things. Plugs, leads,dizzy cap+rotor arm, could be coil breaking down, could also be dirt in carb, need to elimate the obvious before going in to deep. I would suspect that probably an ht lead is breaking down and causing miss fire under load. good luck

When the mis-fire occurs I can dip the clutch and it will rev up perfectly. Got home, tick over OK, removed each lead and it runs on all cylinders When I wiggle the plug connector to the distributor the engine cuts out. Would I be getting that much movement when the engine is under load that this connection is being disrupted?