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BMW 3-Series (E90 E92) Forum
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Marcs335
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07-11-2012, 12:15 AM | #47 |
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So I'm having problems with the JB4 piggy back unit. Mis-firing. Im going to take it out. Anyone else had this problem? It's turned me off tunes all together. I would hate to damage my car. It only plays up with the tune on. Standard mode it works perfect. Easy fix = rip it out!
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07-11-2012, 12:23 AM | #48 | |
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1. is this happening ALL the time, or on the track after a couple of laps? 2. how many k's 3. how many k's on the plugs 4. how many k's on the coil packs i had an issue the first time i went to the track, but quickly worked out (with a little help ![]() A splash of meth never hurts either. |
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07-11-2012, 02:06 AM | #50 |
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My car has done 40000kls and 4yrs old and had procede v4 and v5 and now V5 REV2.5 and the car has not misfired in that time, the new 2.5 is so smooth even my wife commented on how smooth the car was.
Spark plugs replaced but nothing else. Misfires seem to be very common, but usually spark plugs or coils.
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THE BEAST MHD Flash Tune /M3 suspension/Forge Intercooler/Alpina B3 AT Flash/Bilstein B4 Suspension/BMW OEM M3 Steering Wheel and DCT Paddles/LUX V4 Angel Eyes/CIC Retrofitted
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07-11-2012, 02:22 AM | #51 | |
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07-11-2012, 02:35 AM | #54 | |
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07-11-2012, 02:38 AM | #55 |
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07-11-2012, 03:04 AM | #56 | |
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07-11-2012, 03:07 AM | #57 |
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I find it a big difference between the old rev2 and rev2.5 which is the same as rev3
Big difference in low down torque, the car just takes off screaming the rear tyres and i noticed changing from 1st to 2nd auto box the car farts between gears, never used to. And also very very smooth. Well worth the $495 compared to rev2a and 2b. Plus you can run the latest maps.
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THE BEAST MHD Flash Tune /M3 suspension/Forge Intercooler/Alpina B3 AT Flash/Bilstein B4 Suspension/BMW OEM M3 Steering Wheel and DCT Paddles/LUX V4 Angel Eyes/CIC Retrofitted
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07-11-2012, 03:12 AM | #58 | |
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07-11-2012, 04:36 AM | #60 |
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07-11-2012, 05:50 PM | #61 | |
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07-11-2012, 08:26 PM | #62 |
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07-11-2012, 08:43 PM | #63 | |
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I don't know what I want to do now. The talk I had yesterday with the gentleman that put it on the dyno concerned me. The figure below is with [NO TUNE] ![]() Below picture is the second run with [FULL TUNE] - You will see where it starts to miss. (Obviously no KW's where recorded) ![]() Last edited by Marcs335; 07-11-2012 at 09:05 PM.. |
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07-11-2012, 08:51 PM | #64 |
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07-11-2012, 11:47 PM | #66 |
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Your cars F*cked bro.. better get an M3. Even pavo dreams about them
![]() But yeh seriously I'm sure your problems can be worked out and then you will absolutely love the N54. Don't be put off just yet. |
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