---------------------------------------------------------- Engines-List Digest Archive --- Total Messages Posted Tue 10/03/06: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:42 AM - Induction leak (Bob Gibfried) 2. 06:42 AM - Re: Induction leak (Gary Casey) ________________________________ Message 1 _____________________________________ Time: 04:42:20 AM PST US From: "Bob Gibfried" Subject: Engines-List: Induction leak Thanks Archie. Should have thought of that. Bob, Wichita ________________________________ Message 2 _____________________________________ Time: 06:42:54 AM PST US From: Gary Casey Subject: Re: Engines-List: Induction leak One way is to first put an air hose from your compressor to the inlet and blow while holding it by hand - avoiding possible excessive pressure buildup. Then as suggested use a soap solution to find the leak. As for timing, a light won't work. The P lead is either grounded through the points or is grounded through the primary of the coil - they are in parallel. The coil is only a couple of ohm resistance at the most. What I do is use a fairly sensitive ohmmeter (I've used both digital and analog ones for this purpose) and look VERY carefully for a change in resistance. It will go from a short to almost a short when measuring the resistance of the P-lead connection to ground. Don't leave it hooked up if you turn the engine at any speed as the voltage spike created might fry the ohmmeter. This is not nearly as handy as the normal buzz-box, but it works just as accurately. Gary Casey > > Anyone got a simple way to find out if there is an induction > leak? Having problems with getting the engine to idle below 1,000 and > it was suggested that this may be a possible cause. > > Also have to look at timing. Can I use a 12 volt bulb from > the > P lead to the positive lead on the battery to check the Slick mag? > > Bob, Wichita