dilly Posted February 15, 2017 Share Posted February 15, 2017 Brat got to suddenly dying without warning ? Problem has gotten worse..Will not fire ? Replaced ignition switch and distributor, No help ? Need Help Link to comment Share on other sites More sharing options...
Naked Buell Posted February 16, 2017 Share Posted February 16, 2017 Coil. Check to see if you are getting power to your coil. That is what is going to give you spark. Link to comment Share on other sites More sharing options...
dilly Posted February 17, 2017 Author Share Posted February 17, 2017 Thank you for your response ..Replaced distributor (253,000 on engine), replaced ignition switch ? Have fire in on position to coil, but when I go to start position, I lose fire at the coil ? Not having any luck with those 3 relays located near coil ? Not sure what is what ? Have looked at a few other Brat's, and not wired same as far as these relays ? Wonderful little truck..Problem started suddenly..Engine die suddenly.No warning, no hesitation, just die..Crank right back till next episode..Now won't crank period ? (changed coil )..I just not sure what to do mister ?? Link to comment Share on other sites More sharing options...
TomRhere Posted February 17, 2017 Share Posted February 17, 2017 Hot wire the coil by hooking a wire from battery + to coil + and see if it will crank over and run. You'll have to remove that wire to shut engine off if it does. Let us know what happens. 1 Link to comment Share on other sites More sharing options...
dilly Posted February 17, 2017 Author Share Posted February 17, 2017 Thank you in advance for your tip...Great lil truck, but this has been so frustrating..Do my best to try this today and give you a shout..Wish me luck ? I need some Link to comment Share on other sites More sharing options...
dilly Posted February 19, 2017 Author Share Posted February 19, 2017 Tried a jumper to hot side of coil ..Engine cranks, but still will not fire ??Help Link to comment Share on other sites More sharing options...
TomRhere Posted February 20, 2017 Share Posted February 20, 2017 Did you check for spark from the coil-disty lead when you tried the hot-wire? Link to comment Share on other sites More sharing options...
Naked Buell Posted February 20, 2017 Share Posted February 20, 2017 Like TomRhere, it seems like you are losing the power from distributor on center dist. lead. Check your spark plug wires. Are they bad? Link to comment Share on other sites More sharing options...
dilly Posted March 10, 2017 Author Share Posted March 10, 2017 Plug wires are nearly new ? Brat is titled '84, but think it's a '85? Embarrassed to ask, but I can't find the ecm ? Thought it was supposed to be under drivers seat, but I can't find it ? Help Link to comment Share on other sites More sharing options...
GeneralDisorder Posted March 10, 2017 Share Posted March 10, 2017 (edited) The ECM (that it wouldn't have unless its a CA spec engine) does not control ignition on that model. The entire ignition is controlled by the distributor. All the system needs is power to the coil + and the distributor hooked up to the coil. Yellow to negative and Red to positive. If you run a wire directly from the battery to coil + and it does not work then you aren't getting the ignition pulse signal from the distributor module. If you put a test light from the coil negative to battery positive while cranking the engine the light should pulse on and off as the distributor module grounds the negative side of the coil to fire it. If it does not pulse then the distributor module is improperly connected, bad, or the distributor isn't turning (primary side failure) If you do the pulse test and you are getting the pulse then the coil is bad, or you have a cap/rotor/plugs/wires issues not getting the spark from the coil to the plugs (secondary side failure). It's a super simple system - the one pulse test with a $5 test light will tell you almost everything you need to know. GD Edited March 10, 2017 by GeneralDisorder 1 Link to comment Share on other sites More sharing options...
wallaby Posted March 10, 2017 Share Posted March 10, 2017 i have had the distributor module fail without warning - GD's test above would confirm that i have also had something dicky in the ignition switch that it would not run in the "start" ie cranking position so you would crank the engine and it would start after you released the key if it were turning quick enough i installed a push button to start and got around that. to test that you could jump the solenoid with the key on or roll start it....(push, tow....) 1 Link to comment Share on other sites More sharing options...
dilly Posted March 22, 2017 Author Share Posted March 22, 2017 2 different garages have looked at this little truck and surrendered ? New dist., new switch..Need to ask somebody ? Last garage said it was a California car with a computer and possibly it is at fault ? I've looked under the seats and I can't find a dang computer on it ? Any suggestions or help will be greatly appreciated ..Thank ALL of you for your prior posts..sincerely Link to comment Share on other sites More sharing options...
dilly Posted March 22, 2017 Author Share Posted March 22, 2017 I hope I don't sound stupid ? (easy for me) Does this '84 model have a "resistor" between the switch and coil to reduce the voltage ? If it does and failed (old age) might this be the problem ? Link to comment Share on other sites More sharing options...
TomRhere Posted March 22, 2017 Share Posted March 22, 2017 No resistor on these. ECU is mounted to the underside of steering column. Have to remove that trim panel to access it. Link to comment Share on other sites More sharing options...
GeneralDisorder Posted March 23, 2017 Share Posted March 23, 2017 The ECU (if equipped) on that model does not control ignition. Your fault lies elsewhere. I detailed some test in my post above that will narrow it down. GD Link to comment Share on other sites More sharing options...
dilly Posted March 28, 2017 Author Share Posted March 28, 2017 New distributor..Unhooked everything and straight wired distributor..still no pulse.. Have tried another coil..2nd distributor ? Help Link to comment Share on other sites More sharing options...
dilly Posted March 28, 2017 Author Share Posted March 28, 2017 All hooked to coil is jumper..2nd distributor..No pulse..Tried different coil off running vehicle Help Link to comment Share on other sites More sharing options...
GeneralDisorder Posted March 29, 2017 Share Posted March 29, 2017 (edited) Is the distributor spinning when you crank the engine? GD Edited March 29, 2017 by GeneralDisorder Link to comment Share on other sites More sharing options...
dilly Posted March 29, 2017 Author Share Posted March 29, 2017 Engine turns fine..Added new "ground" from body of distributor..New coil..still no pulse ?? Link to comment Share on other sites More sharing options...
DaveT Posted March 29, 2017 Share Posted March 29, 2017 Engine turns, ok, good. Does the distributor rotor turn with the engine? Link to comment Share on other sites More sharing options...
dilly Posted March 29, 2017 Author Share Posted March 29, 2017 YES Link to comment Share on other sites More sharing options...
dilly Posted April 6, 2017 Author Share Posted April 6, 2017 I would like to say THANK YOU to all who have helped me folks....A big THANK YOU ....I am at the point hunting for the ECM ? I simply can't find it..Non turbo truck ? But evidently it has one but don't think its on the underside of steering column as one response said ? Where is it ? Link to comment Share on other sites More sharing options...
GeneralDisorder Posted April 7, 2017 Share Posted April 7, 2017 The carb computer DOES NOT CONTROL IGNITION. Is that clear enough? We simply unplug them when we do Weber swaps. The ignition system works just fine on its own. Stop troubleshooting with Visa! GD 2 Link to comment Share on other sites More sharing options...
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