Gassed'58 Posted February 24, 2009 Share Posted February 24, 2009 Just fitted my Edis set up to test run prior to putting the Megajolt in circuit and made a boo boo...I wired it up with +12v and ground the wrong way round !!!! My question is, have I killed the unit or will it still work having done this ? I canot get the engine to start though this may be for some other reason. Hoping for an answer as I have'nt got another to swop out with. Thanks. Quote Link to comment Share on other sites More sharing options...
Dave W Posted February 24, 2009 Share Posted February 24, 2009 Where are you, someone may be able to offer a spare ? I wouldn't have thought connecting it up backwards would damage it, most modules of this kind are pretty much bomb proof although it will have almost certainly blown the fuse you ran the feed from. Forget the Megajolt altogether (disconnect it) and concentrate on the EDIS, if it has power, the coils have power and the VR sensor is hooked up you will be getting a spark at 10 BTDC. Check the spark with a timing light on each of the HT leads in turn and make sure that you are getting a spark at 10 BTDC on number 1 and then at 90 degree intervals for 5, 7 then 3. Do the same on the other side 6 at 10BTDC then 8, 4 and 2. If you're not getting any spark at all check the power to the EDIS, the coils and check the VR sensor wiring. Quote Link to comment Share on other sites More sharing options...
Gassed'58 Posted February 24, 2009 Author Share Posted February 24, 2009 Where are you, someone may be able to offer a spare ?I wouldn't have thought connecting it up backwards would damage it, most modules of this kind are pretty much bomb proof although it will have almost certainly blown the fuse you ran the feed from. Forget the Megajolt altogether (disconnect it) and concentrate on the EDIS, if it has power, the coils have power and the VR sensor is hooked up you will be getting a spark at 10 BTDC. Check the spark with a timing light on each of the HT leads in turn and make sure that you are getting a spark at 10 BTDC on number 1 and then at 90 degree intervals for 5, 7 then 3. Do the same on the other side 6 at 10BTDC then 8, 4 and 2. If you're not getting any spark at all check the power to the EDIS, the coils and check the VR sensor wiring. Hi Dave, sounds promising, hopefully it will be ok. Location is near Cardiff. Will persevere. Working 12 hr days untill Sunday so time to ponder on it. Quote Link to comment Share on other sites More sharing options...
steve_d Posted February 24, 2009 Share Posted February 24, 2009 If you are running EDIS and the original ECU just to prove the EDIS then don't forget the ECU is expecting a signal pulse to say the engine is turning over before it will fire the injectors. I believe it gets that from the coil so you must leave that connected even if the king lead is out. Steve Quote Link to comment Share on other sites More sharing options...
Gassed'58 Posted February 24, 2009 Author Share Posted February 24, 2009 Hi Steve, no injectors or original ECU I'm afraid, sorry I should have been more precise, I'm running a 2.25 petrol with a Megajolt waiting to go on the vehicle. I put the Edis unit on the vehicle to run on test at default 10 degree to prove the set up prior to connecting the Megajolt. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted February 24, 2009 Share Posted February 24, 2009 If you have killed it it's not the end of the world, EDIS4's are common enough. Quote Link to comment Share on other sites More sharing options...
Gassed'58 Posted February 24, 2009 Author Share Posted February 24, 2009 If you have killed it it's not the end of the world, EDIS4's are common enough. Just blooming inconvenient, anyway, a valuable lesson for all, luckily it wasn't the Megajolt unit. !!! Quote Link to comment Share on other sites More sharing options...
Gassed'58 Posted March 1, 2009 Author Share Posted March 1, 2009 Ok, just to finish this one off, I fitted a replacement Edis unit courtesy of the " scrappy " for a tenner and all is now good. Running really well on default timing of ten degrees Cannot wait to plug the @Jolt in tomorrow. So anyway, learn by my silliness and concentrate on the job in hand. !! Quote Link to comment Share on other sites More sharing options...
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