Randy mckinney Posted May 19, 2016 Share Posted May 19, 2016 1990 Detroit 8V92 had computer hooked to it the guy said ecm was bad so i got a remaned ecm now the truck cranks for 2 sec an quits hit starter again cranks for 2 or 3 sec an quits im runnin out of patience with this pos any ideas on what it could be Quote Link to comment Share on other sites More sharing options...
1965 Posted May 19, 2016 Share Posted May 19, 2016 If it's a ddec I don't see how to fix it without a reader & trouble shoot guide; but if going to guess it possible it's not getting an oil pressure signal & shutting itself down Quote Link to comment Share on other sites More sharing options...
Randy mckinney Posted May 19, 2016 Author Share Posted May 19, 2016 It is ddec2 would no oil pressure shut starter down it doesn't fire starter quits first Quote Link to comment Share on other sites More sharing options...
1965 Posted May 19, 2016 Share Posted May 19, 2016 I wouldn't think so; I wouldn't think that would be engine related; I would be checking starter & wires seeing if loosing fire to solenoid 1 Quote Link to comment Share on other sites More sharing options...
theakerstwo Posted May 20, 2016 Share Posted May 20, 2016 A DDEC does not have to see oil pressure to start and oil pressure has nothing to do with the starter. Quote glenn akers Link to comment Share on other sites More sharing options...
miro Posted May 20, 2016 Share Posted May 20, 2016 Starter may have a thermal protection switch that is defective, try changing starter Quote Link to comment Share on other sites More sharing options...
1965 Posted May 20, 2016 Share Posted May 20, 2016 My bad; I thought when I first read it was running & shutting down; didn't know what application it was in either; atlas-copco had bunch of air compressors with ddec 92's & they had shut downs on them; they would cranck & run & shut down Quote Link to comment Share on other sites More sharing options...
theakerstwo Posted May 20, 2016 Share Posted May 20, 2016 But it takes about 30 seconds for a low oil pressure event to go active. Quote glenn akers Link to comment Share on other sites More sharing options...
Randy mckinney Posted May 20, 2016 Author Share Posted May 20, 2016 The is in an e one junker firetruck rear engine it acts to me like a relay kickin out but to find it is going to be a chore it has fuse panels all over an none are marked if i jump directly at starter an it starts that should tell me i have a bad wire or relay somewere in the 3 mile long wire harness. Correct? Quote Link to comment Share on other sites More sharing options...
theakerstwo Posted May 21, 2016 Share Posted May 21, 2016 You are correct. Quote glenn akers Link to comment Share on other sites More sharing options...
Randy mckinney Posted May 23, 2016 Author Share Posted May 23, 2016 Ok first of all can anybody tell me how to move this topic to electric fourm? An for shits an grins i put old computer back in truck fired right up so i call the place that remaned the computer an they now tell me i have to have a computer/scan tool hooked to truck to program it after they told me it was plug an play does anybody know of anyone in western pa with such tool cause last guy was 400/ hour Quote Link to comment Share on other sites More sharing options...
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