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sunnyc123abc sunnyc123abc is offline
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Default Fuel pressure below target - 05-11-2018, 03:31 PM

I installed a jb4 tune for my 2012 550. When I push it disables cylinder 7&8. Code says fuel pressure below target. I checked my low fuel pump pressure with jb4 connect and it reads around 9psi. Sometimes it will go down to 5-6 and sometimes itíll be at 20ish. Is this normal? Thanks
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Payam @ BMS Payam @ BMS is offline
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Default 05-11-2018, 08:05 PM

Quote:
Originally Posted by sunnyc123abc
I installed a jb4 tune for my 2012 550. When I push it disables cylinder 7&8. Code says fuel pressure below target. I checked my low fuel pump pressure with jb4 connect and it reads around 9psi. Sometimes it will go down to 5-6 and sometimes itíll be at 20ish. Is this normal? Thanks
If you can get a log that would be the best for us to evaluate.


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sunnyc123abc sunnyc123abc is offline
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Default 05-12-2018, 02:54 PM

here you go

2018-05-12 13_52_46.csv
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Default 08-05-2019, 06:55 AM

Quote:
Originally Posted by sunnyc123abc
here you go

Attachment 74372
Has the problem been solved


17 F82 M4 dct/ BM3 Custom flash/ BMS JB4 ISO /200 mesh exhaust Top section / BP Racing Metal Chargepipes and J-Pipe / CSF ColdFront / NGK Racing 0.2 / BMS Methanol injection / 763M / Cup2 /Phoenix Racing Intercooler/ EVENTURI INTAKE
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