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[boxbiker]

I have a 64 tr4 that was I am putting back on the road after sitting for the better part of 20 years. I have rebuilt the carbs and installed an electric fuel pump. The motor will start on the choke but as soon as the choke is released it will die no matter how much I play with the throttle. I have adjusted the jet out 4-5 turns with little effect. I think it has a vacumn leak somewhere but I can't find one.

Any ideas?

[charley fitch]

Have you checked to make sure that you have fuel in the float bowls?  These cars are not so  complicated that a vacuum leak will stop them from running.  If you have rebuilt the carbs, how did you set them up?  If you can not get the motor to run I would have to guess that you have not been able to set them according to the manual.  Make sure you have fuel in the system and that the twenty years of crude in your tank has not blocked something like the needle valves for the floats.  Yes, you just rebuilt the carbs but then you started up the car and pushed/pulled some of that old stuff into your fuel lines.  If you now have an electric fuel pump did you put a fuel filter in the line after the pump (and not before the pump).  The stock mechanical fuel pump has a filter of sorts but I am guessing that an electric pump has no filter in the assembly.
Charley Fitch 

[boxbiker]

I ran some fuel thru the lines before I fitted the pump. I also fit a clesr line between the copper line and the carb so that I could see if fuel was getting to the carbs and it is. There is a filter before the pump.The engine will run as long as the choke is in and I can use the throttle to "race" the engine.

One thing I'm not sure about is the float level. When I dissambeled the carbs the floats were set at a different height than what the manual states and I set them at the level in the manual. The setting I used puts the floats at a lower level.

[TomMull]

Low float level could cause the symptoms you describe, but it would have to be off considerably, 1/16 in or more. Did you use the method from the factory service manual, 7/16 round bar? Tom

[boxbiker]

I set the float level at 18.5 mm as directed in the haynes manual. I noticed that the floats were set quite differently when I disassembled them. They had grose jets and I replaced them with new ones and reset the floats.

[charley fitch]

One way to check your float levels is to remove the vacuum cover, piston and needle assembly from the carb and then look down the hole (jet) where the needle came out . 
What is the fuel level that you see?  The fuel level should be near or at the top of the jet.  You may need to turn on your electric pump to make sure that the float bowl is full and the floats/valves have closed off the inflow.  This should happen in a matter of a few seconds of running.  You would be wise to do this  with both carbs as one carb malfunctioning can cause a whole slew of strange symptoms.
Charley Fitch 

[vila]

It may not turn out to be the cause, but I agree with Tom Mull

Where is the 18.5 mm measurement taken at per the Haynes manual?

18.5 mm is approximately 0.7283 inches where as the 7/16 inch bar is approximately 0.4375 inches.

That is over 1/4 inch lower using the 18.5 mm setting, which could be significant if the measurement is taken at the same location.

I would set it per the Triumph manual using a 7/16 inch drill bit or steel bar before doing anything else. 

Vila

[boxbiker]

I JUST LOOKED DOWN THE JETS ON BOTH CARBS AND DID NOT SEE GAS IN EITHER. I'LL PULL THE CARBS OFF AND RESET THEM.

WHERE DO YOU USE THE DRILL BIT TO CHECK THE LEVEL?

[charley fitch]

The process is to remove the float chamber lid from the carb and and invert it.  With the shank of the forked lever resting on the needle of the valve, pass a 7/16" rod between the inside radius of the forked lever and the face of the lid.  If the forked lever does not contact both the needle valve and the the gauge/rod, bend the lever at the start of the forked section as needed.  Be sure to keep both parts of the forked section even with each other.

Most all of the Workshop manuals show a very good picture of this process.  I would recommend the manual issued by Standard-Triumph Sales LTD.  I beleive both The Roadster Factory and Moss Motors have these in stock. 

Good luck.
Charley Fitch 

[boxbiker]

I guess I need to mention that I have strombergs. Reset the level a little higher but no difference. Made sure the jets were centered and the pistons work fine.

[charley fitch]

Yes the fact that you have Strombergs totally discounts everything that I said.  I am no help with your Strombergs.  You might want to start a new thread/post and title it with the Strombergs.
Charley Fitch