Zeroyon Posted August 20, 2022 Report Share Posted August 20, 2022 Having an issue when cranking that the car doesn't sync, throws trigger error and backfires out exhaust. It was doing it one in four starts. Moved the top trigger in relation to bottom tooth and it got worse 3 in 4 starts. Once running car is perfect, no errors. Details - RB26, 36-2 crank, +1 top cam trigger. Scope look normal ? Will get more scopes with it cranking and post tomorrow. Quote Link to comment Share on other sites More sharing options...
Zeroyon Posted August 20, 2022 Author Report Share Posted August 20, 2022 Oh and ecu was upgraded to latest firmware and just read something on release notes about checking trigger offset Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 20, 2022 Report Share Posted August 20, 2022 Please attach the scope file, a log of it cranking and a copy of your tune Quote Link to comment Share on other sites More sharing options...
Zeroyon Posted August 21, 2022 Author Report Share Posted August 21, 2022 Here is everything from this morning. It took 4 goes to start :D, it was on cold start though, oddly cycling ecu made it start first go. Dadzilla Trigger sync issue.pclx TriggerScopeLog.llgx PC Datalog - 2022-08-21 8;01;12 am.llgx PC Datalog - 2022-08-21 8;04;12 am started.llgx TriggerScopeLog one.llgx TriggerScopeLog started.llgx TriggerScopeLog three.llgx TriggerScopeLog two.llgx Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 21, 2022 Report Share Posted August 21, 2022 Trigger looks ok to me. You only clock an error or two when you stop cranking which is pretty normal. Are you sure it is not just the fuel tune? You have very little crank enrichment for a cold start with E85, typically you would be up nearer to 500%. If you give it a squirt of starter fluid next time does it kick straight away? Quote Link to comment Share on other sites More sharing options...
Zeroyon Posted August 21, 2022 Author Report Share Posted August 21, 2022 I should have said it does it on hot start as well. The example attached just happens to be the first start of the day. did you see the 7 trigger errors in the log file ? Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 21, 2022 Report Share Posted August 21, 2022 9 hours ago, Zeroyon said: did you see the 7 trigger errors in the log file ? Yeah they only happen when you stop cranking from what I could see, the is pretty normal, as the crank slows down the next tooth takes longer than expected to arrive at the sensor so the ECU cant tell if it is a missing tooth or loss of signal. Quote Link to comment Share on other sites More sharing options...
Zeroyon Posted August 22, 2022 Author Report Share Posted August 22, 2022 Interesting that was my first assumption. Quote Link to comment Share on other sites More sharing options...
Zeroyon Posted August 27, 2022 Author Report Share Posted August 27, 2022 Coming back to this, an experienced link tuner had a good go at fixing it, changing the pickup points on the top trigger. It would still sometimes sync wrong and backfire into exhaust. Changed the top pickup to the vcam sensor(3 tooth) and not had any issues since. So still not sure if its a hardware or software issue but it seems fixed by this change. Quote Link to comment Share on other sites More sharing options...
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