[Mgs] H4 or HS4 carbs on an MGA 1600 and Electronic Ignition or Points

Robert J. Guinness guinness at stclegal.com
Wed Jan 10 10:29:59 MST 2018

Here are the reasons for my suspicions.

The prior owner did not drive the car very much.

Fuel Pump (weak slow clicking from the points and sharp blow to the pump 
caused increase in performance)

Bad Gas (Problems began almost immediately after refueling.  Lack of 
prior driving and severe cold may have settled some debris & water in 
bottom of the tank).

Coil (I had similar problems on another MGA that turned out to be an 
overheating and failing coil)

Voltage Regulator ( Problems arose after turned on lights and wipers and 
heater  --  the starter would not crank and no electrics on failure.  
Started it a couple of time with the hand crank though. The seller gave 
me the charger as part of the deal and he had a trickle charger 
installed permanently in the car.  I was able to recharge the battery 
overnight  and then it cranked well.  Of course, it could be the 
generator or wiring downstream from the regulator.  It is on my to do list )

The heater control valve also sprang a leak over the distributor, but 
that seems to have occurred only after the breakdown.

My question really is whether I should go back to the OEM set up (which 
I have n irrational preference for) assuming all the other problems are 
already sorted.  Or would I be giving up some significant performance 
enhancements.  It did go over the Continental Divide in NC strong and 
well at 60 MPH.

On 1/10/2018 2:13 AM, PaulHunt73 wrote:
> e-mail signature
> Under those circumstances a fault has obviously developed.  I'd 
> definitely resolve that first.  If you start messing changing major 
> components and still have problems you won't know whether the original 
> fault is still there, or it is something you have done, or both.  But 
> why do you think four things all happened to go wrong at the same time?
> PaulH.
>     ----- Original Message -----
>     It ran great for @400 miles on a run from Raleigh, NC to just
>     North of Caryville, TN in the New Years Eve subzero weather, then
>     quit.  Would fade and then rev back up (until it didn't anymore). 
>     Probably a combination of fuel pump, bad fuel, coil, and voltage
>     regulator issues. Man was it cold on that mountain waiting for AAA!

e-mail signature

Robert Guinness

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