[Healeys] #174 has a running problem

[I Erbs]

Loose ground? Or a vacuum problem?

Mr. Ira Erbs
On Jul 16, 2015 9:32 PM, "Michael Salter" <michaelsalter at gmail.com> wrote:

> I have done the following;
>
> STEPS TAKEN TO FIND RUNNING PROBLEM
>
> This car has an original cap, original wires, original NA8 spark plugs,
> original black coil, original fuel pump. I am determined not to change any
> of these original parts unless I can confirm definitely that that item is
> the source of the problems…it a concours issue!!
>
> After many short trips 10 – 15 miles etc... the engine started to run very
> badly after 35 odd miles of a longer test drive on a warm but not hot day
> after travelling over a few hundred meters of rough road under construction
> eventually stopping completely as I tried to climb a hill. Sounded to be
> running on 2 cylinders at times. Backfiring through exhaust… no throttle
> response.
>
> Cranked but would not start..Appeared to have spark at the coil wire..
>
> Affer cooling started out again…after 20 odd miles stopped with the same
> symptoms… pulling choke seemed to make no difference.
>
> Could not hear fuel  pump ticking but had fuel pressure at the front
> carb……good spark at coil wire…spark at plugs looked thin …Changed the
> condenser and the rotor and it started reluctantly and ran well for about
> 15 miles then stopped again….same symptoms….changed rotor…ran for 2 miles
> same symptoms…
>
> Found “3 cut” washers under the carb float chamber struts which I think
> could be sealing off the vent slots for the float chambers…
>
> Next day, today, I headed out for another extended drive and the car ran
> perfectly on a similar day for 36 miles then repeated the problem after 36
> miles and I just managed to nurse it home another 11 miles….it actually
> died as I approached our driveway and I coasted in with the ignition turned
> off.  Nothing would make it start.
>
> Tested the coil 4.6 ohms with no short to ground. Took off the float
> chamber lids and both were full to the correct level. The engine cranked
> but would just not start..
>
> After checking everything I could think of I believe that I have found the
> problem but I don’t have time to do another 36 mile test before loading the
> car to take to Enclave…
>
> What do you think I found?
>
> Michael..
>
> --
> *If you can't fix it with a hammer, you've got an electrical problem.*
>
>
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