[TR] Engine Starting Issue...

[Jeff Scarbrough]

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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