I have rebuilt the engine (new valves and rings) in my 1968 Series 1.5 E Type. I have never seen the engine run before and the car I bought had a lot of engine parts missing (carbs, distributor, alternator etc.).
It had good cylinder pressure when I tested it. All.The parts I added are either new or in very good condition. But I.have been unable to get it started or even fire.
I think the problem is very low or no vacuum when engine is cranking. By contrast, the green Jag manual says cranking vacuum should be 16-18 inches mercury.
My list of possible causes for the lo/no cranking vacuum are:
- Vacuum leaks but I can’t find any
- Hole in Stromberg carb diaphragm but again I can’t find any
- Incorrect crank, can and valve synchronization but I was very careful when I assembled the engine and good compression tests suggest this is not the problem
So I have 2 or 3 questions:
- Is it correct that cranking vacuum should be similar to when engine is running?
- Which item in my list of possible faults in list above is likely to be my problem?
- What are other possible causes that I have not listed
And thanks for your patience if you have managed to get to the end of my long story.