i am having a never fustrating issue with cold starting on my k24 engine, i can attached logs, maps etc if it help,
so once hot it will start better, bnut cold it can be a total nightmare, we have made the trigger wheel a 12-1 now as this seem a get around but it seem to be worst on the k24 than on the k20 i had before.
now, what i can see firstly is a bit of volt drop on cranking, but volts do recover, and see unexpected tooth errors on cranking/starting,
and also a back fire every now, what i noticed though is the ecu going into afterstart as rpm seems to spike, ive try rasing this but it wasnt happy starting once i rasied it to stop that.
it seems there is a common issue with k series triggers on the ecu master black, now would V3 software help in anyway?
if anyone wants to help i can send you all the logs and map, once it run it runs really nicely and no trigger errors etc.
For what it’s worth the cold start on my K20’is usually a nightmare as well, with same symptoms of backfire etc.
I assumed it was map related, but am very much a noob with all this stuff and very much on the steepest of learning curves. It is encouraging to hear it’s an almost common issue with the k’s.
Hello, I have actually found a solution to my issue, a good lad called nick from Greece remotely log in and has been though it all and now I have a good cold and hot start. I couldn’t tell you everything he did. But with some playing around etc we have found a good happy medium.
Now, I do still have some trigger errors but it definitely now works though it fine and starts up.
We took a lot of the cranking extra off like batch injector, and use the cranking table with some pulse priming.
Also had some issues with dbw crank settings too to help.
Hello, my cold start was sorted in the end, few things were done, I was dbw and on start up it had too much thorttle open which was blowing though fuel which caused back fires in the exhaust. Also stop using pulse firing option. Use crank table. It was done by a wizard from Greece I got in contact with!
Once we sorted it starting has been very good firing up almost straight away no issues. Only time I had trouble was at very very low coolant temps but its an area we couldn’t test when sorting it. But we took a lot of fuel out the cranking and less open thorttle. But get in facebook and contact nick aristeidopoulos he will sort it
Your cranking airflow is too much, at %3.5 throttle oppening your engine revs up to 2000. you are trying to start engine at %4-%4.8 try to start engine between %2-%2.5
Problem with Japanese engines is they have huge ports and very low airflow speeds for fuel to vaporize. So throttling down increases vacuum to make fuel more atomized.
This was a big improvement, but 2 days later, same problem back again.
Do you have logs of a cold start with DBW on this engine ? … Not asking for the map
