Decat DP Q? - BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)

mjp · 09-05-2011, 11:10 AM

are you guys fitting cat foolers into the decat DP's so that there are no errors?

TT1351 · 09-09-2011, 10:39 AM

I had to even with catted downpipes, some people report no SES at all. I had a JB3 and had to use an O2 simulator to stop the code, now have JB4 running fault clear, no errors, when I switch it off error returns. Fran

BahamaBart · 09-10-2011, 08:07 AM

Quote:

Originally Posted by TT1351

I had to even with catted downpipes, some people report no SES at all. I had a JB3 and had to use an O2 simulator to stop the code, now have JB4 running fault clear, no errors, when I switch it off error returns. Fran

Like you I went from a JB3 to a JB4, I also added DPs but the one thing I don't love about fault clear is that it clears everything not just your 02 signal errors so any other messages your engine wants to tell you about are also cleared out.

Or is my understanding incorrect?

Elsabor67 · 09-10-2011, 08:30 AM

If you have autoclear on with the JB4 it will clear everything. I have a JB4 but also have the V3 DPFIX. That way I can keep autoclear off and see if I am throwing other codes that might be of concern.

TT1351 · 09-11-2011, 09:50 AM

Quote:

Originally Posted by Elsabor67

If you have autoclear on with the JB4 it will clear everything. I have a JB4 but also have the V3 DPFIX. That way I can keep autoclear off and see if I am throwing other codes that might be of concern.

Tel me about this, is this something recent. Went to get my cat inspected computer couldn't get any info from my ECU as it is constantly clearing everything. Been running with autoclear off, to build up info for the computer to read, will clear the DP codes when I go in for re-inspection, is this something new?

Thanks,
Fran

BahamaBart · 09-11-2011, 10:59 AM

Quote:

Originally Posted by Elsabor67

If you have autoclear on with the JB4 it will clear everything. I have a JB4 but also have the V3 DPFIX. That way I can keep autoclear off and see if I am throwing other codes that might be of concern.

I may go this route, makes sense to me.

Terry, should build in the DP fix into the JB4. He's spending too much on the gadgetry stuff.

thebigragu99 · 09-11-2011, 12:17 PM

Actually your all wrong about the autoclear setting..when a real code comes up ,it will not clear immediately.if this happens you should turn off auto clear and check the codes right away..a real code won't autoclear!!

Elsabor67 · 09-11-2011, 02:37 PM

Quote:

Originally Posted by thebigragu99

Actually your all wrong about the autoclear setting..when a real code comes up ,it will not clear immediately.if this happens you should turn off auto clear and check the codes right away..a real code won't autoclear!!

I think that is where YOU are mistaken. Every code is a real code regardless of what it is. A fault code will clear when autoclear is on. When my JB4 autoclear was on, it cleared everything. It doesn't selectively clear some codes and leave others. When I had AC on and then disabled the JB4 to check with the BT tool, there were no codes at all. Now that I have the V3 DPFIX and my AC is disabled I can read my codes after taking the JB4 back to MAP 0.

Better peace of mind for me, but to each his own....

Elsabor67 · 09-11-2011, 02:47 PM

Quote:

Originally Posted by TT1351

Tel me about this, is this something recent. Went to get my cat inspected computer couldn't get any info from my ECU as it is constantly clearing everything. Been running with autoclear off, to build up info for the computer to read, will clear the DP codes when I go in for re-inspection, is this something new?

Thanks,
Fran

Fran,

No, it's not new. I was running for a while with the autoclear on and even the JB4 would tell me I had no codes. I had spoken to Terry via email and after mulling about it I decided to get the DPFIX. Even though autoclear is awesome, I prefer to be able to read the codes in case a problem arises.

Also if you have autoclear on and the JB4 is not disabled, you cannot run a scan with the Bt tool as it won't be able to see the ECU. That's why Terry recommends that the JB4 be placed in MAP 0/disabled to hook up the BT tool.

thebigragu99 · 09-11-2011, 03:00 PM

The Dp code would send a ses light ,other real issues would be a cel ..Terry burger himself had this discussion about this issue..Look it up in n54 tech it explains it!

TT1351 · 09-11-2011, 09:38 PM

Now it makes sense, I think, thanks info was helpful.
Fran

BSM 135i · 09-12-2011, 02:48 PM

wait, so JB4 doesn't have a DP fix built in?? It just can clear the codes thrown from catless DP's?

thebigragu99 · 09-12-2011, 03:03 PM

Quote:

Originally Posted by BSM 135i

wait, so JB4 doesn't have a DP fix built in?? It just can clear the codes thrown from catless DP's?

Read my posts !!

BSM 135i · 09-12-2011, 03:21 PM

Quote:

Originally Posted by thebigragu99

Read my posts !!

calm down killer, i gotcha...

thebigragu99 · 09-12-2011, 04:06 PM

Quote:

Originally Posted by BSM 135i

calm down killer, i gotcha...

Lol....

09-05-2011, 11:10 AM	#1
mjp Private First Class Drives: 135i Join Date: Feb 2011 Location: in my 135i Posts: 131 iTrader: (0)	Decat DP Q? are you guys fitting cat foolers into the decat DP's so that there are no errors?
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09-10-2011, 08:30 AM	#4
Elsabor67 aiming for 450..... Drives: La Jeva ;-) Join Date: Feb 2009 Location: Stuttgart, Ge :-) Posts: 2,277 iTrader: (18) Garage List 2009 135i [5.00]	If you have autoclear on with the JB4 it will clear everything. I have a JB4 but also have the V3 DPFIX. That way I can keep autoclear off and see if I am throwing other codes that might be of concern. __________________ Quote from Ezeedee regarding car mods: "you're only done when you sell the car "

09-11-2011, 12:17 PM	#7
thebigragu99 Banned Drives: 135 tuorbbo Join Date: Aug 2011 Location: nyc Posts: 828 iTrader: (1)	Actually your all wrong about the autoclear setting..when a real code comes up ,it will not clear immediately.if this happens you should turn off auto clear and check the codes right away..a real code won't autoclear!! Last edited by thebigragu99; 09-11-2011 at 12:27 PM.

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09-09-2011, 10:39 AM	#2
TT1351 Second Lieutenant Drives: 135I Join Date: Dec 2008 Location: Massachusetts Posts: 277 iTrader: (0)	I had to even with catted downpipes, some people report no SES at all. I had a JB3 and had to use an O2 simulator to stop the code, now have JB4 running fault clear, no errors, when I switch it off error returns. Fran

09-11-2011, 03:00 PM	#10
thebigragu99 Banned Drives: 135 tuorbbo Join Date: Aug 2011 Location: nyc Posts: 828 iTrader: (1)	The Dp code would send a ses light ,other real issues would be a cel ..Terry burger himself had this discussion about this issue..Look it up in n54 tech it explains it!

09-11-2011, 09:38 PM	#11
TT1351 Second Lieutenant Drives: 135I Join Date: Dec 2008 Location: Massachusetts Posts: 277 iTrader: (0)	Now it makes sense, I think, thanks info was helpful. Fran

09-12-2011, 02:48 PM	#12
BSM 135i Colonel Drives: 08' BSM E82 Join Date: Dec 2008 Location: Cali Posts: 2,232 iTrader: (23)	wait, so JB4 doesn't have a DP fix built in?? It just can clear the codes thrown from catless DP's?