Hi Ian Always appreciate a good observation.
Pulling the vacuum hose can make a small difference, a leaner mix leading to a slight increase in rpm sitting at idle, as you say, effectively the same as a small air leak. It wouldn't be enough to cause the engine to cut out at idle though, which was my main problem. As for the distributor end, pulling the vacuum pipe off lowers the timing advance by a degree or two at idle, which should slow the engine down a bit. I set my timing at 10 degrees BTDC, halfway between the 12 degrees when using good old 4-star petrol and the recommended 8 degrees for unleaded (which is 2-star). With this timing, it just so happens that the combined effects of disconnecting the vacuum pipe pretty much cancel each other out when sitting at idle. Just to add some fun to it, when I was setting up the idle on my CO meter, I found out that my radiator fan switch had failed, leading to a functional test of the overpressure valve in the header tank cap - In other words, the tank boiled over and dumped coolant everywhere! Dave E Back on the road as long as I keep moving. -- -- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To post to this group, send email to quantumowners@googlegroups.com To unsubscribe from this group, send email to quantumowners-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/quantumowners?hl=en IMPORTANT NOTE: All information presented herewith is provided on an "As Is" basis, without warranty or the implication thereof. Neither the Quantum Owners Club nor the individuals associated with the Quantum Owners Club or in the preparation of the above information shall have any liability to any person or entity with respect to liability, loss, or damage caused or alleged to be caused directly or indirectly by the instructions contained within this or related message(s). --- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to quantumowners+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/quantumowners/78349bec-3867-4a29-b53a-661711e3578d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
