Ross Posted February 1, 2005 Share Posted February 1, 2005 OK, so every now and then the wagon will quikly "die" then go again. By this i mean that the reference pulse from the igntion module seems to disappear - The tach drops and the engine stops firing. This only happens in short pulses - less than a second. I was thinking that it may be the ignition module, but seeing as it doesn't seem there is an aftermarket replacement and the oem one is so expensive, i want to rule out everything else first. Just looking for some suggestions on what else to check? Cheers. Link to comment Share on other sites More sharing options...
85Sub4WD Posted February 1, 2005 Share Posted February 1, 2005 I would also bet it is the ignition module. Get one from a junkyard, they're cheap that way. Link to comment Share on other sites More sharing options...
Turbone Posted February 1, 2005 Share Posted February 1, 2005 Check all grounds related to the ignition circuit. Also under the steering column/under dash cover on the right side, is the ign plug/connector. Its usually pink, this sometimes gets hot and will melt the plug, causing a bad connection. Link to comment Share on other sites More sharing options...
Skip Posted February 1, 2005 Share Posted February 1, 2005 by chance do you still have the ignition noise suppression capacitor still connected? Small can shaped devise wired to the coil Just a whim but possibly it's shorting out internally Link to comment Share on other sites More sharing options...
Ross Posted February 2, 2005 Author Share Posted February 2, 2005 I would also bet it is the ignition module. Get one from a junkyard, they're cheap that way. I would do, but i try not to deal with subie junkyard around here if i can avoid it - theres only one in town and they are very expensive. I would rather pay a little extra cash for a new part! by chance do you still have the ignition noise suppression capacitor still connected? Small can shaped devise wired to the coil Just a whim but possibly it's shorting out internally Thanks for that suggestion Skip, ill check that out. I take it the capacitor can just be removed? Ill also do some grounding checks tonight. I am also tempted to buy the aftermarket ign. module i found in a catalogue that looks the same.... its only NZ$90 (list NZ$250!!) but its non returnable....hmmm. Link to comment Share on other sites More sharing options...
naru Posted February 2, 2005 Share Posted February 2, 2005 I was thinking that it may be the ignition module, but seeing as it doesn't seem there is an aftermarket replacement and the oem one is so expensive, i want to rule out everything else first. Just looking for some suggestions on what else to check? Cheers. Excessive distributor shaft sideplay,that broken magnet,maladjusted stator,flaky coil + supply,and an intermittent coil.I know it is possible to install the magnet backwards on some distys as well.Modules are usually go,no-go,but I`ve seen other failure modes on rare occasion. Link to comment Share on other sites More sharing options...
Ross Posted February 2, 2005 Author Share Posted February 2, 2005 Excessive distributor shaft sideplay,that broken magnet,maladjusted stator,flaky coil + supply,and an intermittent coil.I know it is possible to install the magnet backwards on some distys as well.Modules are usually go,no-go,but I`ve seen other failure modes on rare occasion. Yes, i wil definitely replace the magnet before getting the ignition module, although i would think that the prob would happen more often if this was the cause (only happens a couple of times in a week usually). Im waiting on the magnet for another week or so. Doesn't seem to be too much play in the disty shaft, although i don't have the actual specs for it. Might try another coil too - i have had them fail similar to this. I presume high power coils (epoxy filled type) are a no-no with these elec ignition systems? Link to comment Share on other sites More sharing options...
naru Posted February 2, 2005 Share Posted February 2, 2005 Yes, i wil definitely replace the magnet before getting the ignition module, although i would think that the prob would happen more often if this was the cause (only happens a couple of times in a week usually). Im waiting on the magnet for another week or so. Doesn't seem to be too much play in the disty shaft, although i don't have the actual specs for it. Might try another coil too - i have had them fail similar to this. I presume high power coils (epoxy filled type) are a no-no with these elec ignition systems? Maximium clearance allowable between the disty shaft and the housing is .0024 inch.I would be cautious about replacing the coil w/one with a lower than stock primary resistance as the module`s current carrying ability is limited.I`m curious what you had to pay for a magnet? Link to comment Share on other sites More sharing options...
Ross Posted February 2, 2005 Author Share Posted February 2, 2005 Maximium clearance allowable between the disty shaft and the housing is .0024 inch.I would be cautious about replacing the coil w/one with a lower than stock primary resistance as the module`s current carrying ability is limited.I`m curious what you had to pay for a magnet? Thanks Naru. i'm only paying NZ$13.00 (less than US$10) for the magnet, from subaru!!!! I was expecting to pay 5 times that, so i was pleasently suprised! Link to comment Share on other sites More sharing options...
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