Joe:
I've been running the 6 with the current fuel tank/line set-up
for almost three years with no problems. Wouldn't seem to make
sense that all of a sudden vacum lock would be a problem?
Your thoughts. Thanks.
Scott Suhring
Elizabethtown, PA
'70 TR6
Joe Curry wrote:
>
> Scott,
> Is there any indication that the problem may actually be with fuel
> rather than ignition?
>
> I had a little bout with a similar problem last summer. I had replaced
> the fuel tank in my Mk1 Spit with one from a later model. THe one I
> used came off a 1500 that had a vent line to the carbon canister. I
> plugged that line because I have no canister. It performed ok until I
> filled it up with gas and it then seemed to start running badly and
> shortly died (as if running out of fuel). A few seconds of sitting
> would allow it to fire right up and run for a little longer until it did
> the same thing.
>
> The problem was that the cap I use is not vented and the tank was
> developing a vacuum that was greater than the pull from the electric
> fuel pump and therefore it couldn't feed fuel to keep it running. The
> seal in the tank was not good enough to prevent the vacuum from
> dissipating once the car was no longer running.
>
> I remedied the problem by routing the vent line to a hole I drilled in
> the right rear fender well.
>
> I have not had any trouble since.
>
> Maybe something similar is happening to you.
>
> Regards,
> Joe
>
> scott suhring wrote:
> >
> > Well, as they say, leave well enough alone.....
> >
> > I took the '70 TR6 out tonight to see how it was running
> > after some changes I did (will get to this). Started up
> > great, ran well for about 7 miles and then as I was cruising
> > along at 70 mph on the highway it lost all power and backfired
> > with a puff of black smoke. The odometer droped like a
> > lead wait and all engine power was lost. Costed off to the
> > side of the road, shut of the ignition, popped the bonnet
> > and checked around. Couldn't find anything obvious so got
> > back in and it fired right back up. Drove another 5 miles on
> > the highway and it did the same thing. Pulled over, turned of
> > ignition, started it back up and it fired right up. Drove
> > another 2 miles to get of the highway and proceeded home on
> > a secondary road at 45-50 mph. Some thing happened half
> > way home.
> >
> > Thought that the retard line, which I had plugged up, might
> > be building preasure and escaping around the plug (I know this
> > doesn't make sence for the retard line, but will explain) so
> > I pulled the line and replugged it at the carb (bottom rear carb).
> > got home fine the rest of the way. Checked things over again and
> > replugged the elbo connection at the bottom of rear carb with a
> > better fitting screw. Took the 6 back out and drove fine for
> > about 10 miles and went to turn around to head home and it
> > hesitated, back fired but didn't stall out. Drove home and about
> > half way home, you guessed it, stalled out with a single back
> > fire. Started immediately up, as always and got home fine. Doesn't
> > seem to want to run hard, but nothing real noticable.
> >
> > Here is what I have done since last weekend when I drove 300+ miles
> > to the Hellertown show with no problems and the 6 ran beautifully:
> >
> > 1. Replaced the clamping plate on the distributor since it was
> > extremly bent and was not holding the timing well.
> >
> > 2. Decided to go back to hooking up the retard line which had been
> > plugged. Ran the smallest rubber vacum hose (not the plastic type) I
> > could buy from the rear carb to the retard at the dizzy.
> >
> > 3. Reset timing to 4 degrees BTDC with retard off and after hooking
> > up line got a 4 degrees ATDC reading. Fine.
> >
> > 4. Tried the car and it ran like a horses ass. Back fired, sputtered,
> > etc.
> > Limped home and immediately plugged the retard line at the dizzy
> > connection
> > (hence early reference to plugging at carb). Ran it around the block
> > twice and all was fine.
> >
> > Now were back to what happened this evening. I am running the ignitor
> > electronic system under the diizzy cap, which has been great, so no
> > condensor involved.
> >
> > Could there be a problem with my advance line colapsing after running
> > for
> > a period of time? Why is the odometer sutting down, thus indicating the
> > distributor/engine has cut out.....
> >
> > The Bowie show is this weekend and want to be comfortable driving down
> > especially since the drive is basically all "speed racer" on the
> > highways.
> >
> > Any help will be greatly appreciated.
> >
> > Scott Suhring
> > Elizabethtown, PA
> > '70 TR6
>
> --
> "If you can't excel with talent, triumph with effort."
> -- Dave Weinbaum in National Enquirer
|