[TR] Engine Starting Issue...

[Jeff Scarbrough]

P.S.  With a Stromberg carb, there's no accelerator pump.  So giving the
pedal a couple of pumps really doesn't do anything.   But it is a ritual as
old as time, and it doesn't hurt either.

On Fri, Aug 27, 2021, 18:27 Jeff Scarbrough <fishplate at gmail.com> wrote:

> Carb diaphragms?
>
> 90% of carb problems are electric, and 90% of ignition problems are fuel
> related.
>
> Step back, take a breather, and check the basics.  Got compression?  Got
> sufficient fuel delivery?  Got spark at the right time?
>
> On Fri, Aug 27, 2021, 15:10 Joel Justin <j_bar_j at hotmail.com> wrote:
>
>> Hi everyone. This is my first time posting a question. I've got a 1965
>> Triumph 2000 Mk1 Saloon. The engine is basically a GT6 2 liter with dual
>> Stromberg CD150 carbs. I have a starting issue and I'd like to tap into the
>> wisdom of this group. When I first go to start the car, I give it a little
>> choke, pump the accelerator once or twice and leave it at about half
>> throttle, and turn the key. The car always starts right up, even if it's
>> been sitting for a month. But if I pull it out into the driveway, and turn
>> it off (or stall it 😉), then try to restart it, it struggles. It cranks
>> and cranks with the RPMs increasing like it's thinking about starting, and
>> sometimes it does, but others, it takes several cycles of that before it
>> starts. The warmer the engine, the harder it is to restart. If I let it
>> cool for say a half hour, it starts right up again. The carbs were rebuilt
>> about a year ago (this happened before and after the rebuild). I've
>> replaced the mechanical fuel pump with an electric one thinking it might be
>> a weak fuel pump, but that didn't solve it. I improved my grounding to
>> ensure I wasn't stealing coil voltage for the starter, and I even replaced
>> the starter with a high-torque version to get a higher spin rate. None of
>> this helped. I thought vapor lock might be the issue (I also installed a
>> head shield for the carbs), but it happens when it's cold too. The only
>> thing left I can think of is that the carbs are flooding. But when I
>> rebuilt them, I was careful to set the float height. Before I pull the
>> carbs to check/adjust, does anyone have any suggestions on what might be
>> causing this?
>>
>> Thanks, Joel Justin...
>> 1954 TR2
>> 1958 10 Estate
>> 1960 TR3A
>> 1961 TR4
>> 1965 2000
>> 1971 GT6
>>
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>
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