Letter "U" is on top row... 1) Test voltage to coil with voltmeter, not ice pick light. You're going to need at least 8 volts for ignition to fire. 2) Test for oscillating voltage on negative side of coil as ignition module opens & closes 3) Do spark plug test with distributor lead wire instead of spark plug wire 4) Look for voltage (5v?) on trigger wire as magnetic ring inside distributor turns *IF* my engine representative: trigger wire is thin gauge and unprotected in engine compartment (other than standard insulation). Mine slightly melted where it lays across edge of valve cover. Ensure not pulled loose from distributor -- I believe that's pickup itself, not a strain relief. Check connector where it passes through firewall (also where shielding starts). Is a brand new Volvo B28 distributor (with rotor but no cap) on eBay right now for $50. Seller has high positive feedback. Is also a complete B28 engine in Fairfax... Bill Robertson #5939 >--- In DMCForum@xxxxxxxxxxxxxxx, "cruznmd" <racuti1@xxxx> wrote: > I can't catch a fscking break. > > As I was driving home from DC yesterday, I decided I wouldn't -quite- > have enough fuel to make it home. I was very close to my wife's > office so I pulled in next to her. I grabbed my gas can, and used her > car to find a station to fill the can. I drove back, put the gas in > my tank and tried to start the car. > > The engine cranked but didn't even try to catch. I knew almost > immediately why. I put my test spark plug in a wire and I had NO > spark. None. Zero. > > I have: > Checked #1 fuse. Good. (replaced it anyway, no change) > Checked RPM relay. > Bypassed RPM relay anyway. > Bypassed ballast resistor. No spark. > Verified voltage to the coil IS present. > Verified main coil wire is tight on distributor and coil. > Cap, rotor, plugs, and coil are all brand-new. > > I suspect the pick up coil is bad or the ignition ECU is bad. Why? > > Because: > > 1. Voltage is present to the coil. > 2. The RPM relay functions and it takes pulses from the coil to make > the relay function. The pulses ride the white/slate wire. If the coil > wasn't firing, the relay wouldn't close. This means spark is going to > the distributor and is NOT coming out on the cylinder plug wires. > > Any other theories, tests or confirmations are welcome. I'm in a real > bind here folks. > > Thanks, > > Rich > #5335 D.I.W. Yahoo! Groups Sponsor ADVERTISEMENT <http://rd.yahoo.com/M=194081.4074964.5287182.1261774/D=egroupweb/S=170512 6215:HM/A=1732163/R=0/SIG=11n0nglqg/*http://www.ediets.com/start.cfm?code= 30510&media=zone> click here <http://us.adserver.yahoo.com/l?M=194081.4074964.5287182.1261774/D=egroupm ail/S=:HM/A=1732163/rand=733011946> To unsubscribe from this group, send an email to: DMCForum-unsubscribe@xxxxxxxxxxxxxxx Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service <http://docs.yahoo.com/info/terms/> .
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