jimmylemon Posted April 18, 2021 Report Share Posted April 18, 2021 Hi all, Long story short, I had 2200 CNG injectors running on a 26/30. I went to 2400cc siemens which was a nightmare (my fault for trying to run them on that ECU I think), now I'm back at 1650cc bosch. I have loaded my old 2200cc tune, then changed the injector value to 1650cc. Car will only run if I pump the accelerator, soon as I stop doing that, it stalls. Base fuel pressure is set to 60psi. I have a proper tune booked in for Wednesday, just want to be able to crawl my way down, they are literally 10 mins away rather than get a tow. If anyone can take a look at the attached tune and log file, I would greatly appreciate it. This forum has been a massive help so far and I am in debt to a few smart people on here already. Cheers. 1650_start2.llg 1650_tune.pclr 1650cc_start1.llg Quote Link to comment Share on other sites More sharing options...
Electredge Posted April 18, 2021 Report Share Posted April 18, 2021 5 minutes ago, jimmylemon said: Hi all, Long story short, I had 2200 CNG injectors running on a 26/30. I went to 2400cc siemens which was a nightmare (my fault for trying to run them on that ECU I think), now I'm back at 1650cc bosch. I have loaded my old 2200cc tune, then changed the injector value to 1650cc. Car will only run if I pump the accelerator, soon as I stop doing that, it stalls. Base fuel pressure is set to 60psi. I have a proper tune booked in for Wednesday, just want to be able to crawl my way down, they are literally 10 mins away rather than get a tow. If anyone can take a look at the attached tune and log file, I would greatly appreciate it. This forum has been a massive help so far and I am in debt to a few smart people on here already. Cheers. 1650_start2.llg 492.64 kB · 0 downloads 1650_tune.pclr 167.42 kB · 0 downloads 1650cc_start1.llg 578.57 kB · 0 downloads is it running e85 currently? Quote Link to comment Share on other sites More sharing options...
Adamw Posted April 18, 2021 Report Share Posted April 18, 2021 It is probably deadtime/short PW related as idle will be very sensative with injectors this big. As a quick adjustment to get it driving I would just adjust the injector flowrate setting untill it runs better - it sounds like it is too lean so make the flowrate smaller. Just make sure the tuner knows he has to enter the correct injector info before he tunes it. Quote Link to comment Share on other sites More sharing options...
Electredge Posted April 18, 2021 Report Share Posted April 18, 2021 1 minute ago, Adamw said: It is probably deadtime/short PW related as idle will be very sensative with injectors this big. As a quick adjustment to get it driving I would just adjust the injector flowrate setting untill it runs better - it sounds like it is too lean so make the flowrate smaller. Just make sure the tuner knows he has to enter the correct injector info before he tunes it. I noticed the Stoich ratio is 9.70 but the fuel density/temp is still set to petrol... not sure how big of a swing in afr's that will make but also needs to be fixed Quote Link to comment Share on other sites More sharing options...
jimmylemon Posted April 18, 2021 Author Report Share Posted April 18, 2021 It's full time e85 yes. So is it currently too lean? Quote Link to comment Share on other sites More sharing options...
jimmylemon Posted April 18, 2021 Author Report Share Posted April 18, 2021 Ill change the flow rate lower and see how it goes. Cheers. Quote Link to comment Share on other sites More sharing options...
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