[dbogner10]

I am going to be getting the ar design downpipes and just wanted to know if the bms downpipe fix is a must buy, or a good buy. If i understand corretly putting in the new downpipes will cause the check engine light to go on along with a few other things. The dp fix will fix all of these issues??

Just a little info on how it works would be helpful.
Thanks in advance.

[bv1]

Your tune should handle it. If you have a JB4 it is built in.

[dbogner10]

what u mean built in? would there still be any advantages in buying the fix??

[skinrock]

If you have the JB4, you don't need it.

The JB4 tuning system includes this functionality built in so a DPFIX is not required if you are already running a JB4 Performance Tuner!

http://www.burgertuning.com/dpfix.html

[dbogner10]

i mean how to i activate it on the jb4, i know theres autoclearing which will take care of the check engine lights, but how about the timing pull or w.e, that the bms downpipe fix eliminates.

[jokergerm]

it just does it for you

[littledragon99]

How about for COBB? I just bought the AR downpipes as well. Just wondering if I need it for this tune?

[Dark9T]

cobb will tune off your engine check light

[dbogner10]

if u do not need the dpfix if u have jb4 why do so many ppl with jb4 still have the dpfix when runing catles dps

[skinrock]

Originally Posted by dbogner10

if u do not need the dpfix if u have jb4 why do so many ppl with jb4 still have the dpfix when runing catles dps

Who said they are

Maybe they didn't know or don't feel like removing it.

[skinrock]

Originally Posted by Cynical

A lot are because of inspection. Car will pass if JB is on Map 0 (off) and dp fix installed.
You cant just leave the JB on with auto clear cause the obd port is unusable when JB is active if I remember correctly.

I thought it was always a risk to get inspected with them on, regardless of the bypass. Guess it depends on what state.

[vase330]

Originally Posted by dbogner10

I am going to be getting the ar design downpipes and just wanted to know if the bms downpipe fix is a must buy, or a good buy. If i understand corretly putting in the new downpipes will cause the check engine light to go on along with a few other things. The dp fix will fix all of these issues??

Just a little info on how it works would be helpful.
Thanks in advance.

I have AR design DPs and PROCede. PROCede will suppress the engine light if you turn CANclear on. However, your car will not achieve readiness so you won't pass smog test or OBDII test unless you turn off CANclear, and put the PROCede on map 0. But doing that will result in almost instant Catalytic Converter inefficiency codes and engine light. Specifically it does this only if you have newer BMW ECU software. When I had pre-2011 version software there was no light or codes with same DPs. The solution to allow passing the smog test without having to swap DPs back to stock was BMS DP fix. It actually worked on the stock setting they ship it in, without much fiddling with. So short answer is if you have PROCede, yes you will need the DP fix, but only for smog test. If you don't do smog test where you are, or hey just sniff exhaust without plugging into OBDII, no just turn on CANclear you will be fine. Its just BMWs newer software is super sensitive.

[vase330]

Originally Posted by skinrock

I thought it was always a risk to get inspected with them on, regardless of the bypass. Guess it depends on what state.

No its ok eve here and its rather strict. They put a mirror under the car and as long as they see the second set of cats you are ok. They won't even know you did anything to the car. I think they use California standard over here. Yeah next to DC, wouldn't want to polite the air for congress would we? In the mid and south of the state's counties, no inspection required.

[ModBargains.com]

Originally Posted by dbogner10

I am going to be getting the ar design downpipes and just wanted to know if the bms downpipe fix is a must buy, or a good buy. If i understand corretly putting in the new downpipes will cause the check engine light to go on along with a few other things. The dp fix will fix all of these issues??

Just a little info on how it works would be helpful.
Thanks in advance.

The DP Fix does check for readiness and will eliminate the CEL from showing up on dash. Yes, tunes such as the JB4, Proceed, and the COBB Stage 2 will all eliminate the CEL on dash and they function by simply clearing codes constantly. However, they do not check for readiness. Think of it this way, if you do ever remove the tune from the car to bring it in for service or warranty, the CEL would appear on dash. I do always recommend that DP fixes for that reason specifically. We are going to have the AR Design downpipes on our Black Friday sale as well so this would be the perfect time for you to pick one up!

[dbogner10]

Originally Posted by **********s.com

The DP Fix does check for readiness and will eliminate the CEL from showing up on dash. Yes, tunes such as the JB4, Proceed, and the COBB Stage 2 will all eliminate the CEL on dash and they function by simply clearing codes constantly. However, they do not check for readiness. Think of it this way, if you do ever remove the tune from the car to bring it in for service or warranty, the CEL would appear on dash. I do always recommend that DP fixes for that reason specifically. We are going to have the AR Design downpipes on our Black Friday sale as well so this would be the perfect time for you to pick one up!

in the jb4 thread with the new firmware upgrade (http://www.n54tech.com/forums/showthread.php?t=10605):

"If you have an offroad race car with downpipes the DPFIX is no longer needed. Remove it and put its wiring back to stock. If you lost the jumper wires you can relocate 3 wires from unused locations within your PnP harness. Just check for spots that do not have a factory wire connected and salvage the jumper. Turn autoclear on in the JB4 by selecting option 1/3."

hes saying remove it.. i was just wondering if you can still have both installed and have no issues..(the dpfix and the jb4 with new firmware)..i am going to be picking up my catles dps in the next week and want to know if i should grab the dpfix with it or not..i was interested in the dpfix because it checks for readiness as Alan stated above..just wanted to make sure with this new firmware, that you CAN still have BOTH.

[bahn stormer]

Originally Posted by vase330

I have AR design DPs and PROCede. PROCede will suppress the engine light if you turn CANclear on. However, your car will not achieve readiness so you won't pass smog test or OBDII test unless you turn off CANclear, and put the PROCede on map 0. But doing that will result in almost instant Catalytic Converter inefficiency codes and engine light. Specifically it does this only if you have newer BMW ECU software. When I had pre-2011 version software there was no light or codes with same DPs. The solution to allow passing the smog test without having to swap DPs back to stock was BMS DP fix. It actually worked on the stock setting they ship it in, without much fiddling with. So short answer is if you have PROCede, yes you will need the DP fix, but only for smog test. If you don't do smog test where you are, or hey just sniff exhaust without plugging into OBDII, no just turn on CANclear you will be fine. Its just BMWs newer software is super sensitive.

This is true but you do also have the option of reversing the harness mod and using the O2 sim built in to the Procede while on Map 0. Of course you would then perform the harness mod again after the test.

[Mike@N54Tuning.com]

You can continue to run the DP fix with the JB4, but its not needed.

Mike

[dbogner10]

If you install the dpfix v3 into the JB4 Harness, I have a question.. Will you be able to still remove (uninstall) and then reinstall the JB4 without having to touch the dpfix again. As in, once the dpfix v3 is plugged into the JB4 Harness other then adjustments you don't have to touch it again?? Its just I take out my JB4 sometimes and then put it back in..If I install the dpfix I want to make sure ill still be able to continue taking it out and putting it back in with no problems and without having to continuously reinstall the dpfix into the JB4 harness. Hope that made sense lol

[vasillalov]

My communication with Terry@BMS:

Hello Terry,

I have a quick question regarding the BMS downpipe fix. I own the v3 unit with the adjustable switch. I've been running it for over 2 years now with great success. My car is due for emissions this year and I wanted to ask the following question:

Does the BMS DP Fix v3 set the Catalytic Readyness flag in the DME? I can take my car to OBD-only emissions testing stations where they plug their testing equipment into the OBD port while the car is running. They look for two things: stored trouble codes and readiness codes. If there are no stored trouble codes and there are no catalytic readyness codes, then they'll make me drive around a bit till the readiness code is set.


Thanks for your time and help in advance.

His response:

Hi Vasil,

The DPFIX v3 will allow readiness.

Best,
T

There is a difference between constantly clearing the CEL and actually letting the ECU set the readiness codes for emission purposes.

I have been running full catless turbo back system for the past 2 years in conjunction with BMS DPFix v3. I've not had any CEL lights with it, and so far I've not had to go through emissions testing. I am fairly confident from the above correspondence with Terry that my car will pass emissions when time is due.

[vase330]

Originally Posted by bahn stormer

This is true but you do also have the option of reversing the harness mod and using the O2 sim built in to the Procede while on Map 0. Of course you would then perform the harness mod again after the test.

The whole point of the DP Fix is I can just put PROCede in map 0 turn CANclear off and am good to go to the smog test without having to mess with ECU box etc.

[vasillalov]

Originally Posted by vase330

The whole point of the DP Fix is I can just put PROCede in map 0 turn CANclear off and am good to go to the smog test without having to mess with ECU box etc.

Correct! In most cars that I've played with, the moment you clear any stored DTCs off the ECU, it also resets all readiness codes for emissions purposes. Never clear your DTCs right before doing emissions testing. You'll not pass.