JB4 Hesitation

[///F80M3]

So I had the dealer change the plugs. 5k miles later I'm getting sputtering doing wot from 4k rpm. Map 1 has a slight sputter and map 0 runs smooth. Today I got misfire cylinder #1 and #2 for the first time on map 2. I don't know what to do since map 1 and 2 isn't useable anymore.

Plugs have 5k miles on it. Should I change coils? Car has 39k miles.

I have short logs when the sputtering occurs. It happens right after I floor it then 5 secs later it pulls.

[SflBimmer8484]

Gap the plugs down to 0.18- 0.20

[///F80M3]

Originally Posted by Andrew@ActiveAutowerke

Gap the plugs down to 0.18- 0.20

Plugs have 5k miles on them. Should I replace it since I have to gap it?

[SflBimmer8484]

I'd check them out first but you can't go wrong with a new set properly gapped. sounds like you are blowing out the spark at high boost

[///F80M3]

Originally Posted by Andrew@ActiveAutowerke

I'd check them out first but you can't go wrong with a new set properly gapped. sounds like you are blowing out the spark at high boost

How long should the plugs last if gapped properly?

[///M4ster Yoda]

Sounds like the experience I had on my e92 N54. Get a flash tune. JB4 is junk IMO

[BoosTonian]

Plugs. Spark getting blown out.

Take them out and look at them to see if any have a larger then normal space, but gap them down to .18

[Sleeper]

Originally Posted by ///M4ster Yoda

Sounds like the experience I had on my e92 N54. Get a flash tune. JB4 is junk IMO

I don't disagree that a flash tune is the only proper way to tune, but ignorant blanket statements like yours are just dumb. It's safe to say the JB4 is not junk - results based threads here and other forums confirm that. Try not to let the anonymity of the internet allow you to post stupidity.

[///M4ster Yoda]

Originally Posted by Sleeper

I don't disagree that a flash tune is the only proper way to tune, but ignorant blanket statements like yours are just dumb. It's safe to say the JB4 is not junk - results based threads here and other forums confirm that. Try not to let the anonymity of the internet allow you to post stupidity.

Stupid? Really. Time and again. Threads going back years and platforms. JB4 installed and car runs like complete shit. Must be the plugs. Oh wait it's the plug gap. No it's the coil pack. How about its JUNK. I've been through it on the N54. Wouldn't put it in my M4 if you paid me.

[Mike@N54Tuning.com]

Could be plugs. You posted photo of the logs so I can't open them in the JB4 interface to check your settings and other data. Normally you'd post the CSV log files.

Mike

[The Choosey begger]

Originally Posted by ///M4ster Yoda

Sounds like the experience I had on my e92 N54. Get a flash tune. JB4 is junk IMO

Inconsistent power and it felt like a science project when i had one. Not getting the right afr, not meeting boost targets, methanol injection fucking up, on and on...

[dmk08]

Originally Posted by anglo

Inconsistent power and it felt like a science project when i had one.

Lol you guys are funny. Go look at Drews half mile runs. Man what an inconsistent piece.

Just a few months ago Master Yoda was posting he was putting JB4 on his M4.

Most of the time JB4 issues = User error.

[///M4ster Yoda]

Originally Posted by anglo

Inconsistent power and it felt like a science project when i had one.

Yes. I wasn't trying to be a jerk off with my posts last night. I learned my lesson with the N54. Why put a device on a 70-90k car that makes it run inconsistent and shitty half the time. I ended up going Cobb Protune on that platform. Car was a beast. OP I recommend doing the same here.

[The Choosey begger]

Originally Posted by dmk08

Lol you guys are funny. Go look at Drews half mile runs. Man what an inconsistent piece.

Just a few months ago Master Yoda was posting he was putting JB4 on his M4.

Most of the time JB4 issues = User error.

Typical fanboi hahaha

Of course you're not gonna mention times when Terry's cars or other members cars had problems at those events.

[LLNM4]

I'm running JB4 for 2 yrs without any problems. With E30/E50/E85 or meth is the best buy and the fastest on the 1/4 mile.

I have now the stage ecu tuning and running jb4.
This combo is the best. Win-win situation.

[F80R]

Like there hasn't been a problems with flash tuning lol .. there always will be a problems JB4 or flash tune etc .. some cars have them some don't ..

[dmk08]

Originally Posted by anglo

Typical fanboi hahaha

Of course you're not gonna mention times when Terry's cars or other members cars had problems at those events.

Im actually taking my car in next week to have the ecu pulled and sent to Autotalent for BM3. Not sure if Ill leave thr JB4 on as well or not. What I can say is to call the jb4 junk is laughable.

[mike@x-ph.com]

Op,
Recommend you post longs instead of screenshot and as mentioned above make sure plugs are gaped correctly

[Mike@N54Tuning.com]

Originally Posted by F80R

Like there hasn't been a problems with flash tuning lol .. there always will be a problems JB4 or flash tune etc .. some cars have them some don't ..

That's an understatement. The JB4 is a terrific tuning system capable of managing from stock to 700whp+ but its only as good as the vehicle hardware being tuned and its settings.

Mike

[9SECDD]

Love my JB4.

Have never had any problems with it over the last 1 1/2 years and various mods/setups on my car.

[rmedeir1]

Originally Posted by ///M4ster Yoda

Sounds like the experience I had on my e92 N54. Get a flash tune. JB4 is junk IMO

+1. JB4 nice but not as smooth and comparable to a VF HEX

[BoosTonian]

JB4: Great for making high boost

Flash: Great for everything else

Remember, the JB4 is more so used as a boost controller since it cannot change any of the mapping of the car. Because our cars are "smarter" then normal cars, the JB4 works well with it since the car understand and makes the appropriate changes.

The JB4 isn't "junk" but I cannot say it is problem free. Personally, I ran much more consistent at the track and at the dragway with a flash tune (VF)...fastest run with JB4 was 11.8, fastest run with hex was 11.1...and yes, exact same setup for both runs. Can go into the differences I felt going down the track, but this isn't the time or place for it, PM me if you want to hear it. Take it for what it's worth though.

I also felt that the car was searching for the correct boost with the JB4, whereas with flash it just knew to boost to 26psi. Again, a flashing advantage.

But...this is why the highest powered cars run both. JB4 handles boost, flash takes care of everything else so that the car responds to the added boost even better.

Everything that I stated has been said in 10000xxxx other posts lol