03-27-2024, 03:05 PM | #1 |
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Drives: M3CX, 335is ST 6MT
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JB4 Shift Bog With CS Transmission Tune
Has anybody else gotten the CS transmission tune and felt how flawless the shifts were before tuning? As soon as I installed the JB4 the car now falls out of power between shifts. Swap to map 0 and it returns to perfectly smooth shifts with constant power.
Has anybody experienced the same or know what the fix could be? I'm coming to this forum first because I bought it second hand and therefore support from Terry isn't covered (I don't think)... though I have purchased numerous products from Terry when I was building my 335is. |
03-27-2024, 04:01 PM | #2 |
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Me, personally, I’d never run a JB4, but whatever. You need to call Burgerboy and let them know of the issue. They need to get an M4 with CSL coding to test before they just push shit out expecting it just work because it worked before.
Not sure if anyone with a CSL has tried running a JB4 or not, but I would doublecheck what maps are on the thing. If anything, it should probably be configured similar to if it were to go on a CSL as opposed to a base or comp M3 or M4. And make sure you’re on the latest firmware for it, especially if you bought it used. |
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03-27-2024, 06:11 PM | #4 | |
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Quote:
Edit: their M4 test car is running trans software. Granted, not CSL, but worth considering From their recent X post: Burger Motorsports @burger_tuning Jason @ BMS got the best trap speed of 167.47 mph in the standing 1/2 mile! Shift S3ctor Airstrip Attack at Chuckwalla Valley Raceway in our JB4 Tuned M4 Comp. Mods: S58 JB4 Locked ECU BMS S58 top mount intakes Fuel-It! Port Injection xHP trans flash E50 fue
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Last edited by Hit_Apex; 03-27-2024 at 06:20 PM.. |
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03-27-2024, 06:30 PM | #5 |
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I had a Jb4 running map 2 with DP’s and the CS trans flash and all worked perfectly well together.
Sorry you’re having issues Op. hopefully you can get it sorted. |
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03-27-2024, 08:14 PM | #6 | |
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OP, make sure it’s the right box for your car and update the firmware/software on it. And make sure you reset it back to default… there’s a chance the previous owner has some customer settings on it… either way, that’s all like expected stuff that as the new owner you should have done prior to installing it and driving around. You need to start with that and see where it goes from there. |
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cs transmission, jb4, piggyback, tune, tuning |
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