I have a 1965 4.2 and I'm having problem starting the car when the engine is hot. If I press the accelerator, as per the manual instructions, the car will never start. The best way, until now, is without touching the accelerator. However, this procedure is not very effective either. Other than that, the engine works fine and have no problem starting the car when cold, even when I have left it p?árked for over a month. Would very much appreciate your urgent comments. Thanks in advance.

Submitted by NC19-27130J on Fri, 01/11/2013 - 13:15

I have run into this problem on several Jaguar drives I have lead. I believe it is related to the modern fuels we now use. They have a much lower boiling point. We got around this by raising the bonnets when we stopped to let the engine heat escape. Eliminated the hot starting problem all together. Worked on the sixes and vee-twelves. Obviously, if the car is suffering from a mechanical issue, this may not help. I also appreciate that one may not be inclined to leave the Jag unattended with the bonnet open.
Such is life with Jags!
Mike.

Submitted by jeff@wrsimsage… on Tue, 01/08/2013 - 11:31

I had the exact same problem, what worked for me was to replace the starter with a "high torque starter" . My mechanic said Moss Motors in CA has them. Mine came from some where in Mass. If Moss doesn't have them I can do more research to find the supplier in Mass.

Submitted by b8_agnew@hotmail.com on Tue, 01/08/2013 - 10:16

I have a very similar issue that I have not had time to dive into. Im not sure if its a fuel issue of a head soaked starter. Mine starts fine when cold but if I stop for gas of for any short period of time where the car does not have time to cool down, it will not start back up. I have to wait a few minutes until the temp drops and then it will start with a little finesse. I have smelled a fuel odder at time so I wonder if my float is getting stuck?

Submitted by SE21-38504 on Tue, 01/08/2013 - 09:54

Since your car initially starts and runs OK, I will assume that the battery is in good condition and the ignition system is operating properly.

Your car acts as if it is having a fuel delivery problem, possibly heat transfer to the carbs which might boil out the bowl or cause the float needles to stick, throttle spindle seal leaks, leaking carb floats causing too much fuel to be delivered, etc.

Until you find the problem, try this trick so that you can still use the car. When you park the car, rev up the engine as you turn the key off. This will turn off the fuel pump and fuel delivery to the carb while pumping extra air throught the carb and manifold to clear it of any excess fuel.

Good luck!