There is no need to guess - "a little richer". Instead set the mixture to where it should be: Set idle speed to 750 rpm, then adjust idle mixture to fastest idle. Next, lean it until it just starts to slow down. Finally, set idle speed screw again to 750 rpm.

Hi guys

I got it running almost ok,i went around 100 KM journey up and down and pulled spark plug and it was ok felt it was little lean and adjusted the mixture little rich , now it is perfect no considerable miss on law acceleration and pulls well,it is ready for x mas cruise starting from tomorrow early morning as usual.

thanks
regards
sumith

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Car stalling at max vaccuum under brakes, may be booster related?

You need to run it as long as necessary to re-create the problem condition. That might be 30 seconds, or it might be 10 minutes.


Quote:Take a look at the Jetting Specifications.

Hi DD

Do you think How long do i need to run the car to check the status of spark plug ?are 2 to 3 kms ok or need more, i am running 82C thermostat on it

thanks
regards
sumith

Hi DD

ok i will try it back again and let you guys know,

thanks
regards
sumith

That looks too rich. The part where the color matters is deep down inside at the base of the insulator. You can get some idea by looking at the ring at the end of the threads.

To tell by the color, warm up the car, drive it as per normal and come to an idling stop. The cut the engine and look at the plugs. Because if you accelerate the car again, the color will change, so the color needs to be checked at the moment of problem.

Tendency to stall from a stop is usually caused by one of these:
* Accelerator pump problem
or
* Vacuum Leak
or
* Bad coil

Occasional a coil will work fine at higher RPM but not at low RPM

To test for Accelerator pump trouble, while car is moving, let engine idle (depress clutch) for a while, then let out clutch and try to accelerate from idling RPM. If it is fine, chances are it is not the accelerator pump. You can also test the pump with a visual test.

Test the coil by swapping it with another unit, for example the one in your other Datsun.

Hi DD

No While engine running only,if you stop the car a traffic or some reason, i can't get it running as usual need to accelerate moderately higher than usual if not engine tries to stall, while running normal speed no problem.
Here i pulled a spark plug again and noticed it is little white color means too lean is it ?

and confirm me this too

Slow air bleed primary jet is much bigger than secondary is it ?

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Quote:

By 'complete stop' do you mean turning off the engine? When re-starting a warm engine it is normal to hold throttle open part way - press accelerator pedal about 1/2 way down.

Hi Sumith,
is your carb getting hot ? if you stop the car then have trouble getting it going it could be vapor lock... basically the fuel gets that hot that it boils in the carb.
i had this on my A14 engine and had to wrap the exhaust manifold and install a heat shield...