mr2hillclimber Posted December 27, 2019 Report Share Posted December 27, 2019 hello i am having some troubles with working with my mr2. i will try to start it and it will die about 3 seconds later i cant figure the issue so i was hoping that one of you guys can help me. mr2 tune 2019 dec 26.pclr Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 27, 2019 Report Share Posted December 27, 2019 That would normally indicate you dont have enough fuel. It starts because of cranking enrichment then once that fades out you dont have enough fuel to keep it running. You need to adjust the master fuel number. Bigger gives more fuel. As a very rough guide, 1000cc injectors will want about 10mS and a 500cc inj will need somewhere around 17mS. Usually easiest just to bump it up or down until it runs good when warm. Quote Link to comment Share on other sites More sharing options...
mr2hillclimber Posted December 27, 2019 Author Report Share Posted December 27, 2019 Ill have to try that out thanks ill datalog this morning too Quote Link to comment Share on other sites More sharing options...
mr2hillclimber Posted December 27, 2019 Author Report Share Posted December 27, 2019 here is a data log on the start mr2 start log.llg Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 27, 2019 Report Share Posted December 27, 2019 So did you try adjusting the master fuel? Your lambda goes lean before it stalls, this means either the master fuel is not large enough or you have some other fuel supply problem such as no fuel pressure. Quote Link to comment Share on other sites More sharing options...
mr2hillclimber Posted December 28, 2019 Author Report Share Posted December 28, 2019 I increased the master fuel from 14 to 19 and increased some of the numbers on the map but im still having the same issue but not as bad now im gonna play around with the map tomorrow i think im getting close I got 60 psi of fuel pressure with my 540cc injectors so i don't think its a fuel supply issue i think its just the tune Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 28, 2019 Report Share Posted December 28, 2019 Dont be scared to try the master at 25 or 30. Quote Link to comment Share on other sites More sharing options...
Neo Style Posted December 28, 2019 Report Share Posted December 28, 2019 post start enrich can't keep -20 started? Quote Link to comment Share on other sites More sharing options...
neil brown Posted December 28, 2019 Report Share Posted December 28, 2019 Reduce fuel pressure to 45psi as injectors will be rated at that pressure and enter the dead the times in ecu Quote Link to comment Share on other sites More sharing options...
cj Posted December 29, 2019 Report Share Posted December 29, 2019 your post start enrichment table shouldnt be negative. Yours is all -20 for some reason. Try something more like this Also, what temperature is it there? Your Air temp is showing -4C and your coolant temp shows 8C. Do these sound reasonable? Quote Link to comment Share on other sites More sharing options...
mr2hillclimber Posted January 1, 2020 Author Report Share Posted January 1, 2020 Cj thanks for the info i was wondering about the post start enrichment and the temps are right its cold here in northeast Pennsylvania the coolant had a little more heat in it when i did the datalog On 12/29/2019 at 5:27 AM, cj said: your post start enrichment table shouldnt be negative. Yours is all -20 for some reason. Try something more like this Also, what temperature is it there? Your Air temp is showing -4C and your coolant temp shows 8C. Do these sound reasonable? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.