Laurent Billard Posted March 6 Share Posted March 6 Hi, i just received my CDI+ 6 pin for my 1986 Turbo (930). Easy install and worked immediately ! On the test ride, revs went up very well until …3500rpm !? At that rpm, the engine began to sneeze and to make weird noises … any idea on how to fix that ? best, Laurent Quote Link to comment Share on other sites More sharing options...
classicretrofit Posted March 10 Share Posted March 10 Hi Laurent Have replied to your email but for the benefit of future readers: This sounds like an issue with the coil. Having a spare coil that could be tested - or having a local specialist with a known good coil is a useful tool here. Coil issues can be disguised by inefficient older boxes but, when asked to perform properly by CDI+, tired coils can struggle. Our CDI+ is a dual-spark unit. What may be happening here is the coil struggling to fully recharge between the two sparks. You can use the software to make the spark interval a bit longer - default is 400m/s but it is possible to take it to 500m/s and try that. Turbos are starting to build boost pressure and therefore cylinder pressure around 3-3500rpm and the pressure can make a weak spark struggle a bit. Quote Link to comment Share on other sites More sharing options...
Laurent Billard Posted March 21 Author Share Posted March 21 Hi everyone, I changed the coil for a new one (Partsclassic) and re-set the sparks interval to 500 vs. 400ms: it works perfectly! actually, I have the feeling of a solid 10% power increase from 1000rpm onwards … thanks, Laurent Quote Link to comment Share on other sites More sharing options...
classicretrofit Posted March 21 Share Posted March 21 Hi Laurent, this is great news! Let us know if there is anything else we can help you with. Quote Link to comment Share on other sites More sharing options...
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