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      06-29-2017, 06:03 PM   #1
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The Just Some Normal Q'S regarding Bms Jb4/Bcm Thread LoL

So i have a 16 M5 she's been patiently waiting for wheel's and some other goodies to arrive before i actually started driving and really enjoying her..I have a fun daily and have had a 13M5 for 3 years and 10mo's prior so letting her sit in the garage for a couple o few 4 mo's was'nt an issue for me..

As the story goes at 2200 miles, like last mo. i started w my build and i'll spare the boring ascetic stuff and jump rt to the modds and Q's i have in relation to them and my Olivia

So Perf. modds are:

Jb4 w Bcm
Plugg's Gapped at .18
Msr intakes
Msr catless dwnpipes
Tms Muff Delete (She's loud Af)

Since the car now has some 2800 miles and im pretty upset and kinda like wtf cause i feel as i've taken away the driveabilty from the car

So i'll ask some simple Q's and you guys can help me w answers pls , anyone w knowledge pls feel free to participate but those w similar Modds minus the tms muff delete def pls chime in w thoughts and similarities

1)Is it normal at cold start for the car to stall as cold start idle falls off?(every time)

2)Is it normal for when i leave my garage and hold a steady throttle the car jerks and the idle jumps? (i live in a complex and try to be quiet so usually 1st or 2nd gear)

3)Is it normal when out on road driving if i hold the throttle steady at any rpm in any gear the rpm jumps 2-400rpm's any speed any gear and the car lurch's fwd?

4)Is it normal to stop ata light and for the rpm's to bounce round?(no more steady 7-800 smooth)

5)Is it normal to get walk'd by a 16 M5 w an AA plug play piggy and catless dwnpipe who made 610rwhp? (2nd gear , 3rd gear 60-140 like 3+ cars all day long like 5-6 xs he beat me like an unwanted stepchild)

6)Is it normal for a Jb4/Bcm to come w map 2 as everyones does and need tuning? (would'nt this come kinda preprogrammed from bms)

Is it Normal that i'm ready to rip this shit out've my car and wanna go back to stock?

i went back to the shop that installed and they did some loggs and said that the map 2 needed tuning based off the loggs and changed some stuff # wise but idk wat, they said i was over booosting like 27 and was have throttle closure at tops of gears , after that it ran a lil better but that was only 100 miles ago i took her out last nite and she"s like a damn civic w 145,909 miles on her a Real POS.. total turn off i love my Olivia and have dumped time , Nrg and a Shit load of $$$ in these last 4-5 mo's in modd's for what just to take the pure pleasure of driving a brand new car out've the equation..

So last nite i took her out for a drive met up w a friend and she ran worse than ever did loggs and everything looks fine i think afr's looks strait and boost was on target but im feeling flat spots in tops gears , geting alot of backfireing soon as i shift , using gas like crazzzzy and im slow as ass.. the topper was on way home from his place i was literally using every thing the car had playinmg w an older 750i for 20 miles from 82mph-to at x's 158mph so i ask

Is this Shit Normal lol

Thanks in Advance

Neil
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      06-29-2017, 08:05 PM   #2
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Neil, sorry to hear your car's still having these issues (been following on the So Flo M group). I'm not running JB4 / BCM combo so not an expert on this setup but none of what you describe sounds anywhere near normal; much like our common friend mentioned in point #5 I run a stage 1 Piggy with no issues whatsoever.

I assume you've reached out to BMS but that would be a good place to start IMO and go from there.
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      06-29-2017, 09:32 PM   #3
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Plugs are gapped way too tight IMO.. Regap them and see if that solves any of your issues.
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      06-29-2017, 11:56 PM   #4
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You mentioned muffler delete did you plug the hoses that go into the original muffler? Also when I had jb4 they had a example that I copied into the settings and the car ran a lot stronger. I would also check your firmware I found the latest one giving me the same problems you described. So I went back to the previous one. http://www.n54tech.com/forums/showthread.php?t=31292
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      06-30-2017, 08:51 AM   #5
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i'am literally dying @ all questions starting off with "is it normal"



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      06-30-2017, 08:52 AM   #6
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Quote:
Originally Posted by LI-M5 View Post
So i have a 16 M5 she's been patiently waiting for wheel's and some other goodies to arrive before i actually started driving and really enjoying her..I have a fun daily and have had a 13M5 for 3 years and 10mo's prior so letting her sit in the garage for a couple o few 4 mo's was'nt an issue for me..

As the story goes at 2200 miles, like last mo. i started w my build and i'll spare the boring ascetic stuff and jump rt to the modds and Q's i have in relation to them and my Olivia

So Perf. modds are:

Jb4 w Bcm
Plugg's Gapped at .18
Msr intakes
Msr catless dwnpipes
Tms Muff Delete (She's loud Af)

Since the car now has some 2800 miles and im pretty upset and kinda like wtf cause i feel as i've taken away the driveabilty from the car

So i'll ask some simple Q's and you guys can help me w answers pls , anyone w knowledge pls feel free to participate but those w similar Modds minus the tms muff delete def pls chime in w thoughts and similarities

1)Is it normal at cold start for the car to stall as cold start idle falls off?(every time)

2)Is it normal for when i leave my garage and hold a steady throttle the car jerks and the idle jumps? (i live in a complex and try to be quiet so usually 1st or 2nd gear)

3)Is it normal when out on road driving if i hold the throttle steady at any rpm in any gear the rpm jumps 2-400rpm's any speed any gear and the car lurch's fwd?

4)Is it normal to stop ata light and for the rpm's to bounce round?(no more steady 7-800 smooth)

5)Is it normal to get walk'd by a 16 M5 w an AA plug play piggy and catless dwnpipe who made 610rwhp? (2nd gear , 3rd gear 60-140 like 3+ cars all day long like 5-6 xs he beat me like an unwanted stepchild)

6)Is it normal for a Jb4/Bcm to come w map 2 as everyones does and need tuning? (would'nt this come kinda preprogrammed from bms)

Is it Normal that i'm ready to rip this shit out've my car and wanna go back to stock?

i went back to the shop that installed and they did some loggs and said that the map 2 needed tuning based off the loggs and changed some stuff # wise but idk wat, they said i was over booosting like 27 and was have throttle closure at tops of gears , after that it ran a lil better but that was only 100 miles ago i took her out last nite and she"s like a damn civic w 145,909 miles on her a Real POS.. total turn off i love my Olivia and have dumped time , Nrg and a Shit load of $$$ in these last 4-5 mo's in modd's for what just to take the pure pleasure of driving a brand new car out've the equation..

So last nite i took her out for a drive met up w a friend and she ran worse than ever did loggs and everything looks fine i think afr's looks strait and boost was on target but im feeling flat spots in tops gears , geting alot of backfireing soon as i shift , using gas like crazzzzy and im slow as ass.. the topper was on way home from his place i was literally using every thing the car had playinmg w an older 750i for 20 miles from 82mph-to at x's 158mph so i ask

Is this Shit Normal lol

Thanks in Advance

Neil


this is perfectly normal for a jb4 car.
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      06-30-2017, 09:42 AM   #7
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No, it is not normal. I experience some lurching and bucking but only in Sport+ in low rpm. I got walked by a bpm car, so there's that... Pretty normal.

Anyway, get a tune, dude, and gap your plugs to .022 or .024.
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      06-30-2017, 09:52 AM   #8
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Quote:
Originally Posted by TheHouseWon View Post
No, it is not normal. I experience some lurching and bucking but only in Sport+ in low rpm. I got walked by a bpm car, so there's that... Pretty normal.

Anyway, get a tune, dude, and gap your plugs to .022 or .024.




it's a flash, you should get walked.
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      06-30-2017, 10:03 AM   #9
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Check your BCM Install. You may of cracked your vent tube which will create rough idle, throw misfires, and not allow the cars efficient dynamics on/off system to work
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      06-30-2017, 10:16 AM   #10
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Or you installed the BCM wrong?
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      06-30-2017, 10:34 AM   #11
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-What I can suggest is make sure the vacuum lines are plugged after the Muffler delete.
-Take the JB4 and BCM off and see if the error is still there.
-Or talk to Terry and send him some logs
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      06-30-2017, 10:47 AM   #12
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1. Plug gap is too tight for your boost level (0.024")
2. You need to get logs to determine what's going on
3. You don't drive your car much and it needs to adapt especially with the JB4 pushing that kind of boost (it is relying on factory mapping for fuel as if car is running 14-15psi)
4. Check all vacuum lines
5. #2 will tell you if the JB4/BCM was installed correctly

I really don't recommend running 20+psi without a flash to get your baseline maps to at least 22psi - all the fueling etc is really strained running the factory maps

If the car isn't running well why are you flooring it everywhere and trying 80-15x pulls? Something will break... fix it and then enjoy it!
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      06-30-2017, 10:48 AM   #13
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Quote:
Originally Posted by TrevorM3 View Post
this is perfectly normal for a jb4 car.
LMFAO
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      06-30-2017, 12:27 PM   #14
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Ok boys thanks for all your input i really appreciate it , any and all knowledge is helpful in my quest for a happy car..

So last nite i spoke w George/Msr he said it sounds like a vacuum line pinch'd maybe under the intercooler and creating a boost leak possibly from the install of the bcm.

so here are a bunch of things we tried last nite and thing's that we've pretty much ruled out.

Def ck'd and doubled ck'd the tms muff delete vaccum lines , all ok
Def ran map 2 and did logg's and jb4/bcm is fine and operational
loggs were showing all looks good w air/fuel , was overboosting at times and they changed the safety # they also changed a few more settings in the map 2 and the car def feels a lil bits smoother

we looked at as many vent / vacuum / hoses etc as we could w out taking out the intercoolers cause i need new clamps (which im grab today) so we didnt wanna take off the intercoolers w out having new clamps but all hoses looked ok
Maf's sens were in and sitting very flush , one on the driver side was a lil off but a few turns of the screw fixed that.

TN we gonna def gonna pull the intercoolers out double ck all lines to throttle body then ck and regap the plugs , after reading all of everyones responses (thank you again) im sure this is where my problem lies i was the one that told him to gap that low in the 1st place after a few pm's w another member when discussing the jb4/bcm way before the install.he told me to gap at .18 and i took his knowledge and ran w it lol

after this im hoping all will be ok , if not then we all are ata loss..
i will mention im working w one of the major tuners on this they did the install and all perf related stuff to my car and they have been very helpful and are also ata loss cause they flash alot more than jb4/bcm but i think after last nites map2 loggs and corrections the map 2 is happy and hopefully gapping pluggs up will make the car and myself happy as well..

Ok so the milllion $$$$ Q , for my modd's where would you think these pluggs should be ?

ive seen mike benvo say im way to tight , ive had people say they left em stock and it was fine but no msr intakes w that guy then ive read .22-.24

when speak w the guy from the shop this am i and he decided that when they do .18 its for guys that are doing stage 2 and 3 flashes where they adjust air/fuel ratios and it makes sense but since im not flashed/flashing that .22 would be our next move and hopefully that clears me up! If not then try .20

So how does .22 tn after we do all that shit i ment'd above sound ?

Again guys thanks for all your help and knowledge , as im a long time M owner but as im sure by now you can tell im def retarted lol

Neil
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      06-30-2017, 12:30 PM   #15
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Quote:
Originally Posted by allmotor_2000 View Post

1. Plug gap is too tight for your boost level (0.024")



If the car isn't running well why are you flooring it everywhere and trying 80-15x pulls? Something will break... fix it and then enjoy it!
Or this

All motor all the while i've been ask am in danger of harming something and ive been told no as my loggs are looking for most part ok , initially we were have overboost and throttle closure but some 150 miles ago i was under impression that we fixed this , but as ment'd im retarted lol..

Neil
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      06-30-2017, 02:50 PM   #16
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Good luck Neil; hope you resolve asap.
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      06-30-2017, 06:03 PM   #17
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Quote:
Originally Posted by josec70 View Post
Good luck Neil; hope you resolve asap.
Thank's Pal , Me too !!
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      06-30-2017, 10:10 PM   #18
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I am sure its not your plug gaps, theres no logic, yes you need a tighter gap at higher boost where the load is greatest but theres no down side at lower boost or we would all have problems at part throttle lol!

My guess would be a boost leak and possibly the hose at the bottom of the intercooler isn't sat right, its easliy done and common where people don't take the time to check theres no kinks or the hose isn't tucked.

So what does Terry say on your logs? If fueling is an issue, the short and long term fuel trims will so this straight away. You may need a meth injection system to hold up the fuel system.

If the BMC is fitted wrong, this will show on the logs where one bank won't achieve target or over boost- this covers a pin-out or BMC connect plug swap issue, again common if installer doesn't take the time on the install by cutting corners and not making enough room to look and work behind the left (as you look from the front of the car) intercooler.

Again logs should point to the issue.
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      06-30-2017, 10:20 PM   #19
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Quote:
Originally Posted by TrevorM3 View Post
this is perfectly normal for a jb4 car.
Trevor you are an opinionated nut job

We all know you are biased against the JB4... there are a lot of happy people who run the JB4 without any issues And most issues people have are related to cutting corners like not gapping plugs, poor install and running the wrong map / to high a boost levels for the fuel system on that particualr car to handle... all just basics of tuning really.

JB4's have there place for those who don't want to pry open, drill or ship their ecu's for flashing and want less risk from warrnty issues and want a relatively simple way to put the car back to stock at time of hand back, sale or if warranty require.

Flashing is for all those that don't mind and are not worried if warranties are at risk from opening/tampering. There are some benefits over the JB4 like sitching of the CAT monitoring and cold start cycle.

Each to there own, just stop spouting rubbish
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      06-30-2017, 10:41 PM   #20
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Try map 5 or map 3 and see how it runs.
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      07-01-2017, 03:48 PM   #21
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ok so an update , ln we ck'd all the vaccum lines etc and reclamped intercoolers and really didn't find much..

we pulled the plugg's and they seeem'd fairly dirty / shitty for 3k miles , opted to install brand new oe pluggs and gap em to .22 and double checked everything yet once again..

started her up and had half a cold start w out stalling , idle was great and smooth! took her out for a spin and she's pulling hard throughout the rpm range in all gears.. did a logg and logg looks good/great as i was told.. drove her home at an easy steady pace w a few quik jabbs at throttle and felt alot alot cleaner than before..

woke up this am and started at cold start like a bat out've hell and idle dropped off and did not stall , ck'd af ratios in 3rd at wot and im 11.9-13.1 at idle afr was 14.7'ish
brought her to work and she felt Sexxxy again pulling strong


Hopefully the .18 was way to tight as alotta peeps here suggested and that was what was causing my issues..

Got Moe the man from DME cmin dwn on thurs , will have him do what he does and adjust my jb4 map 2 settings , then hit the dyno..

thanks again for everyones input..

Neil
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      07-01-2017, 07:30 PM   #22
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Glad things are better!
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