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BMW 3-Series (E90 E92) Forum
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MHD Flash problems, need help
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07-29-2018, 06:39 AM | #1 |
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MHD Flash problems, need help
Hi guys
I've had a go running the MHD flash tune (stage 1 map) and it failed early in the process. Now the car won't start.. the starter cranks but it wont start Now of course I can't try to flash again but the ignition is not and hence cant run the flash Not really sure what to do from here. The battery is on a charger now as maybe it was too low for the flash. I did have the charger connected at the time Keen on any help to get the car running again! Thanks |
07-29-2018, 06:44 AM | #2 |
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that is your problem. Need battery charger on at all times when flashing. Especially the the first time you flash cause the waterpump runs and flattens your battery real quick.
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Aussie e92 335i. Pure Stage 2 Twin Turbos, Pure Performance Motorsport's Forge Conrods and Pistons, Fuel-it Port Injection, 7.5" Step-Up intercooler, Fuel-it Stage 3 LPFP upgraded fuel lines, Tial 50mm BOV, TFT RHD Inlets, MHD Custom Wedge E70 Map, Split Second PI controller, BMS OCC, PRP Coil Kit, AR Design 3" Catless DP, Remus Dual 2.5" system with 84mm quad tips, RB PCV valve, CSF Radiator
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07-29-2018, 06:58 AM | #3 |
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OK yes i charged the battery to full and have the charger still on and am now running the stock map flash. i was stupid and thought the engine had to be running when it said ignition needs to be on! ive pulled the lpfp fuse but didnt know about the water pump. for some reason the headlights are on while the flash is running now even though they are switched off...
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07-29-2018, 03:44 PM | #4 | |
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Quote:
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Aussie e92 335i. Pure Stage 2 Twin Turbos, Pure Performance Motorsport's Forge Conrods and Pistons, Fuel-it Port Injection, 7.5" Step-Up intercooler, Fuel-it Stage 3 LPFP upgraded fuel lines, Tial 50mm BOV, TFT RHD Inlets, MHD Custom Wedge E70 Map, Split Second PI controller, BMS OCC, PRP Coil Kit, AR Design 3" Catless DP, Remus Dual 2.5" system with 84mm quad tips, RB PCV valve, CSF Radiator
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07-29-2018, 05:34 PM | #5 |
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The fuel pump doesn't run anymore with MHD during flashes, so the requirement for a charger is lessened. The water pump doesn't run at all, and never has during flashes. You just need to flash with ignition on not engine on and you'll be fine. The flash takes over the canbus, so thats why the light switch doesnt work.
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07-29-2018, 05:40 PM | #6 |
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thanks guys for chiming in. i got it flashed back to stock and now it starts fine. now that im familiar with the procedure ill have another go soon at getting to stage 1
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