catless with no CEL ?

FSDET

Member
:
E90 2006 325i 6spd
got a custom 3 inch s pipe back, 265miles and no cel light..how long does it usualy take ? and ofcourse without a MIL eliminator.
 
Its MSP specific. I never got a cel after going catless and not using the MIL that came with the downpipe. I stopped counting the miles. Its well over 10,000 though.
 
do the "spark plug" dual plug mod.
u dont need a MIL then.
nothing has to be cut, just screwed onto the DP at the bung.
 
It only tests the rear O2 for switching under very specific conditions. It may take a day or you may never reach the right conditions for it to run the test.
 
It is very specific, conditions such as:
run time
ambient temp.
coolant temp.
drive cycles
fuel level
load conditions
lunar psoition.
etc. all have to be in its set parameters before it decides its worth testing.
 
Thanks for the specifics. I didn't realize that many factors could come in to play. Thats computer logic at its finest!
 
yeah thanks for the info blkzoomzoom. so if the light doesnt come on it means that the car wont go in limp mode and run super rich right ?
 
If you are on and off the throttle a lot and the car doesn't idle for extended periods, you may never get one. Get on the highway and cruise steady at 70 for a while, it will come on :).
Joe
 
90 percent of my driving is on the freeway 70-80. but yeah im not complaining, one less thing to worry about
 
or maybe its cuz its leaking at the Spipe Jpipe flange. im goin to get the circuitsports midpipe cuz it has the right flange and a flex pipe
 
Dr.Sound said:
do the "spark plug" dual plug mod.
u dont need a MIL then.
nothing has to be cut, just screwed onto the DP at the bung.


Could you possibly go into futher detailes about this mod? I have a cel and am debating on whether spending 25 bucks for the MIL and all the splicing is worth it if there are other ways to go about this.
 
i have 450whp now i mean miles and no CEL yet maybe its cuz its leaking. i just picked up the circuit sports midpipe hopefully that wont leak like my custom jpipe
 
Mine got about 6 inches before the cel came on the second time. The first time it took about 300 miles. So its really anyones guess if it comes on at all.
 
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