[Bangdrum]

Hello all. This is my first post as I'm new to tuning and trying to learn as I go along. I've had the jb4 with BMS DCI's installed and running good for about 4 months or so. No codes or headaches, just pleasure! I always use map 5 because I'm not sure if map 1 and 2 would be safe with the 91 octane we have here in California....

Spring forward to this last Saturday, I installed my new VRSF 3" catless dp's myself with the help of a video from the guy's over at AR. Drove about 200 miles on them so far (still in map 5) and today I got the service engine soon light on the way home from work. I was just cruising on the freeway around 75mph when I noticed it. The car seemed to bog a bit at low rpms. Got home and instantly got the codes off with the jb4.

2D2E Angle of throttle valve - intake pipe underpressure, correlation

2A17 DMTL diagnosis module tank leakage, system failure

29F4 Catless Downpipes Detected

29F5 Catless Downpipes Detected

I'm not real sure what I should do from here and would greatly appreciate any advice! Thanks

[Sshec152]

The 2 catless downpipe detected codes are normal. Clear the codes and see what comes back, if any, then start your diag from there.

[samuelmccarthy13]

Originally Posted by Sshec152

The 2 catless downpipe detected codes are normal. Clear the codes and see what comes back, if any, then start your diag from there.

+1 the two catless DP codes are shadow codes and dont need to be worried about. As for the other two, do a quick search for BMW e90 08 codes and there are plenty of threads on N54 tech that resolve these issues.

[V8bait]

Originally Posted by Bangdrum

Hello all. This is my first post as I'm new to tuning and trying to learn as I go along. I've had the jb4 with BMS DCI's installed and running good for about 4 months or so. No codes or headaches, just pleasure! I always use map 5 because I'm not sure if map 1 and 2 would be safe with the 91 octane we have here in California....

Spring forward to this last Saturday, I installed my new VRSF 3" catless dp's myself with the help of a video from the guy's over at AR. Drove about 200 miles on them so far (still in map 5) and today I got the service engine soon light on the way home from work. I was just cruising on the freeway around 75mph when I noticed it. The car seemed to bog a bit at low rpms. Got home and instantly got the codes off with the jb4.

2D2E Angle of throttle valve - intake pipe underpressure, correlation

2A17 DMTL diagnosis module tank leakage, system failure

29F4 Catless Downpipes Detected

29F5 Catless Downpipes Detected

I'm not real sure what I should do from here and would greatly appreciate any advice! Thanks

Put the cats back in, you're in Cali and you're being illegal.

Also, backend flash. I'll get you started.

[Bangdrum]

Originally Posted by V8bait

Put the cats back in, you're in Cali and you're being illegal.

Also, backend flash. I'll get you started.

Hey I still have secondaries! thanks for the link. I'll have to do some reading because I'm not real sure what back end flashing is. I was under the assumption that it was for more aggressive tunings (more than just downpipes and dci's)

I just took the car for a drive and upon initial take off, I was getting a good amount of smoke out of the tail pipes but no codes.(smelled like fuel). Once I started going though the smoke stopped. I had the Hpfp replaced right before I installed the jb4. I'm thinking I should change my jb4 user settings back to default and let it relearn the car?

[Bangdrum]

Originally Posted by samuelmccarthy13

+1 the two catless DP codes are shadow codes and dont need to be worried about. As for the other two, do a quick search for BMW e90 08 codes and there are plenty of threads on N54 tech that resolve these issues.

Thank you. Yea I was expecting the dp codes but the other two kind of scared me. I found that for the intake code, resetting it may just do the trick. If not, setting the jb4 user settings back to default hopefully fixes it.

[samuelmccarthy13]

Originally Posted by Bangdrum

Hey I still have secondaries! thanks for the link. I'll have to do some reading because I'm not real sure what back end flashing is. I was under the assumption that it was for more aggressive tunings (more than just downpipes and dci's)

I just took the car for a drive and upon initial take off, I was getting a good amount of smoke out of the tail pipes but no codes.(smelled like fuel). Once I started going though the smoke stopped. I had the Hpfp replaced right before I installed the jb4. I'm thinking I should change my jb4 user settings back to default and let it relearn the car?

A little smoke is always expected when changing to catless DP's. I also run JB4, have very similar mods to you. I run my Jb4 in map 2 (after I got DP's). If you're looking into a Backend flash, I would suggest reading up on the forums about JB4 stakced with MHD Pump Fuel BEF. There are many many threads on it.

As for the reset, no real point. You could do a 1/7 reset through the steering wheel options on the JB4.

[Bangdrum]

Originally Posted by samuelmccarthy13

A little smoke is always expected when changing to catless DP's. I also run JB4, have very similar mods to you. I run my Jb4 in map 2 (after I got DP's). If you're looking into a Backend flash, I would suggest reading up on the forums about JB4 stakced with MHD Pump Fuel BEF. There are many many threads on it.

As for the reset, no real point. You could do a 1/7 reset through the steering wheel options on the JB4.

Are you running 91 octane too? That's the only reason why I haven't tried map 2

[samuelmccarthy13]

Originally Posted by Bangdrum

Are you running 91 octane too? That's the only reason why I haven't tried map 2

Im from Australia so I use 98RON fuel which (correct me if I'm wrong) equates to around 93 octance. But running map 2 on 91 octane is fine. If you're still hesitant, run on map 5 first and see how you like that.

[Bangdrum]

Originally Posted by samuelmccarthy13

Im from Australia so I use 98RON fuel which (correct me if I'm wrong) equates to around 93 octance. But running map 2 on 91 octane is fine. If you're still hesitant, run on map 5 first and see how you like that.

I've been on map 5 since I first got the box and intakes, but the thought of it constantly retuning kind of erks me. I know others do it just fine but a more consistent tune would make me feel better. I wish we had 93!