timing issues

I have a t2 1600 1979 does anyone know the correct timing for the van of this year? it has one notch on the pulley, its had a powerspark electronic ignition with vacuum advance fitted to replace the old distributer, at lower revs when i put the accelerater down it hesitates before it picks up, at higher revs it seems to be fine, the carb seems to be ok its a standard solex34 pic 3 with has been refurbished, any help would be great

 

Likely that your one mark is 7.5 btdc, which is fine, so time it to that.

 

is it a V notch in the back of the pulley?

Timing is 7.5°BTDC on the std vac advance dizzy!!

 

its got a v notch in the back of the pulley, should i time it to that or 7.5 to the right of the notch? is it possible to get rid of the hesitation completly.

 

Time it to the notch, which'll be 7.5 BTDC. If you look on the front face of the pulley, you may see a diamond shape pressed into the metal (to the left of the notch) - this'll be TDC (or it may not be there at all). Static time it to 7.5 so your timing's about where it should be, then look elsewhere for hesitation.

Accelerator pump in carb working ok? Mech advance in dissy working smoothly (check with strobe). Tapetts set properly?

 

Don't know if they are the same but I timed my beetle today with a voltmeter. Got the engine to tdc then rotated it to 7.5 degrees. Made sure the distributer arm was pointing at cylinder 1 (trace the ht lead to furthest right spark plug). Turned the ignition on. Removed the distributer cap, put the voltmeter positive on coil(the side that the distributer is connected to, not the battery) earthed the other one. The slackened the distributer off and turned counter clockwise till I got a reading. Worked a bloody treat

 

That'd work! The meter should read 0V when the breakers are closed, then jump to 12V when they open (and the spark's generated).

 

Thanks for all the response's i'll try it with the volt meter, i found a sit

 

Had a look at my pulley today

Mine has a v notch on the rear of the pulley and a dot on the front face just to the left of the notch

 

The V'll be the timing mark. The dot'll be TDC.

 

When i time it at the v notch the hesitation seems worse and quite sluggish on pull away, when i time it at 7.5 btdc about 11mm to the right the hesitation is still there but it does not seem as bad, its also better at pulling away, but i'm not sure if advancing the timing is masking the problem. going to have a whole day on the van sat, i'll post the out come

 

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