Hi all,
Back again with another strange one -
As of the last couple weeks, my 68 VE has been dying under high throttle.
Start, idle and just standard driving even up to fairly moderate throttle doesn't produce any issues.
However, under high or close to high throttle the car will run up (say from 20kmh to approaching 70kmh) without any issues (not hearing any knock/ping or other unusual noises) and suddenly cut out. No big fanfare at that point, engine stops firing, dash lights come on and I roll over to the curb doing my best impersonation of a chump.
At this point the car will take 5-10 min to start again - the most recent time I gave it about 5 mins between each attempt, the first just a small depression of the pedal before turning the key (no luck) and the second one pump right to the floor (wondering if it had starved instead of flooded) at which point it did start and drove right home. I think time was the factor there, though - upon stopping the fuel filter did have some fuel in it but wasn't completely full.
I've reproduced this on the road multiple times testing - flat,uphill downhill doesn't matter. I haven't been able to reproduce it sitting in the garage parked and probably won't since the neighbours may get cranky.
Does this happen to sound familiar to anyone? I've done a bit of poking around here and didn't find much close to the mark beyond flat spot on throttle threads.
Here's my list of attempted fixes so far:
Flushes/fluids/filters service on the car (trying to establish a baseline state)
Removal and clean of spark plugs (using a 6mth old set of NGK iridium plugs, just a wash in throttle body cleaner as sanding/scraping damages them. Plugs appear to be spot on for color etc and no buildup, none oiled)
Inspection and clean of points/rotor + timing (was out by about a degree...small potatoes)
Carby clean out (throttle body cleaner + toothbrush + revs)
New fuel pump (carter pump, not a dodgy one..seen too many people shy away from the sketchy ones here - did make idle and just about everything else much, much better, but still dies the same under WOT)
Other things possibly of note:
Carby 2bbl carby rebuilt about 3.5 years ago,
Ignition leads replace at about the same time,
Coil replaced (with bosch GT40) about same time,
Alternator reconditioned about 1 year ago,
Battery about 2 years old.
Points + rotor done about 3 yrs ago.
Ambient temperature for incidents ranged from about 25-40*C
Car pretty much weekend drives plus the odd 4hr trip. WOT has never been an issue up until this point - could go from street all the way to highway speeds and above under full throttle without issues for the previous 5 years of owning it.
Any ideas? If I've missed something not worth repeating feel free to just point me at the thread and I'll work my way through. Thanks for your time
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