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JP147

Weber tuning

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I have a Weber 32/36 on my EA81 and it was set up pretty good and it would work at all throttle positions.

When the hot weather came though, it would idle all over the place and diesel indefinitely when the ignition was switched off.

I leaned the idle mixture some so that it would idle better when hot and doesn't diesel most of the time. The problem now is that as soon as the secondary throttle starts to open, it is too lean and wants to ping when it is warm. With just the primary throttle it runs fine though.

I have already eliminated all vacuum leaks, retarded the timing as much as possible without losing performance (about 5 before TDC) and disconnected the vac advance (it didn't work anyway).

 

Is there an easy way to fix this issue?

 

Thanks.

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I have a Weber 32/36 ... diesel indefinitely when the ignition was switched off. ...

 

Is there an easy way to fix this issue? ...

 

The dieseling could be "Cured" by doing an internals' Cleansing, usually pouring a complete can of SeaFoam thru a direct vacuum hose on the intake manifold, like the one for the Brake Booster; such cleansing will remove the main carbon deposits that might stay hot enough to start the fire on the combustion chamber, after the engine is Shut off.

 

I Kindly suggest you to Try that and see if the other issues might heal as well.

 

Kind Regards.

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Thanks for the advice.

It would be good to clean out all the carbon, but I have heard different things about it. Some people have said to use cleaners like that, others have said not to and to only clean the carbon off the pistons when they are out of the engine.

 

For now I will reset the idle because the weather has cooled down and dieseling should be less of a problem.

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Mine was dieseling too after leaning out the mixture to get idle smoothed out. I was also misfiring in a cylinder due to an oil seal leak. I've rebuilt the motor since then but have yet to fire it up. I'd try seafoam as Jeszek suggested. It's a cheap and easy fix compared to pulling the motor and the following chaos that ensues.

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you could also buy a Gunson colortune device. It worked for me tuning my 32/36 along with others input as to there jet sizes. Read the 38/38 to 32/36 thread

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