QuestionQUESTION: Howard.. I am hoping that you can lend a hand with some advice relative to my 1976 TR6.
The car is cranking strong but will only kick off if I add a small amount of fuel directly into the carbs. It seems that that carbs are not getting fuel however, when I pull the fuel line just ahead of the carbs I get fule flow through the line
Hoping you can provide some guidance ?
ANSWER: Hi Michael,
You didn't make it clear that when you put a little fuel directly into the carbs, did it start then or not?
If it did start, then you need to check fuel pressure (not just see fuel flow) It needs to be 1.5 PSI to 3 PSI pressure. If you have fuel pressure and no start you need to check the choke system. Some Stromberg carburetors had auto chokes and others had manual chokes depending on where you are. Which do you have?
If the engine starts by putting fuel directly into the carbs and it runs and after warm up it runs ok then the chokes are probably all of your problems. However, if it will not run even with fuel added directly to the carbs, then you need to start from scratch as I would have to do if it was brought to me in a shop.
If this is the case, you need to first read my tech tip on how to start an engine that does not want to start. http://mg-tri-jag.net/tech14.htm
After you have read it and did what I outlined and you run into a problem, let me know.
Howard
---------- FOLLOW-UP ----------
QUESTION: Howard thanks for the quick response..to clarify, the car does start when I add fuel directly to the carbs but peters out when the fuel is consumed. Despite having fuel flow I have to say that it is no way under any real pressure (1.5PSI - 3PSI)
Is your coaching that it might be the fuel pump? or a dirty fuel filter or that might be limiting the pressured flow ?
Thanks
Mike
AnswerI have learned to never try to guess what a problem might be. Test, Test, Test to find a problem then you know what is wrong.
Put a fuel pressure gauge on the pump and see what the pressure is and if it is low, remove the inlet fuel from the tank and lower it below the level of the tank in a can to see if a steady good flow is there. If so correct the pump. If you have a fuel filter between the pump and the carbs, be sure to check pressure between the filter and the carbs.
When replacing pumps on Triumphs you need to note the length of the arm and it's operating range. Then measure the depth of the cam that operates the pump arm. Some pumps had short arms and were bolted directly to the block and others had a long arm and required a spacer block between the pump and the engine. Also when installing the pump be sure that the arm does not slip off to one side of the cam it rides on.
Howard
