 » Site Navigation | | | | » Recent Threads | | | |  |  |  |  07-24-2010, 02:58 PM | #1 | | Senior Member Join Date: Aug 2006 Location: Central NJ Posts: 2,440 |  Car is running!!
My blue ti got wet and the ECU fried. It's a DASC Stage 3. I got a new ECU and the tune, but it still didn't work.
After spending 6 months diagnosing it-- it was a plugged Cat. When the ECU was dying, it was misfiring and throwing super rich exhaust into the cat.
Moral of the story: check your cat's flow.
Car dynoed 30 more HP with a new one. 300 HP FTW |  |  | | 07-25-2010, 07:14 AM | #2 | | Senior Member Join Date: Sep 2007 Location: asdfasdf Posts: 10,002 |
sounds like you must have been pulling your hair out over something that simple  good thing you got it figured out though | | | | | 07-26-2010, 03:37 AM | #3 | | Junior Member Join Date: Mar 2010 Location: GA Posts: 7 |
Congrats. Must've been frustrating going through a huge list trying to diagnose the problem! | | | | | 07-26-2010, 04:06 PM | #4 | | Senior Member Join Date: Apr 2007 Location: Elizabeth City, NC Posts: 3,877 |
Glad you got it running Pat, how did you figure out it was the cat? __________________ ~Dave~
98 328ti Morea Grun slicktop
11 128i space gray slicktop
13 JGC WK2 Deep Cherry
Search | RealOEM | | | | | 07-26-2010, 05:17 PM | #5 | | Senior Member Join Date: Aug 2006 Location: Central NJ Posts: 2,440 |
Removed O2 sensor and it fired right up. My uncle, a mechanic, suggested it because the DME had its voltage regs fried that were linked to the spark signal. Two cyl were not firing correctly so it was shooting hot gasoline into the cat which made it plug up. | | | | | 07-26-2010, 10:10 PM | #6 | | Senior Member Join Date: Dec 2007 Location: Gulfport, Florida Posts: 3,208 |
Damn I was totally stumped. I'm glad it's fixed and I never would have thought it was that. It was totally stumped...
So is it running on the new DME? | | | | | 07-26-2010, 10:53 PM | #7 | | Senior Member Join Date: Aug 2006 Location: Central NJ Posts: 2,440 |
Yep... sorry I didn't email you with the results-- I'm still in the Cayman Islands doing some research but my dad told me he and my uncle tried pulling the O2 sensor to verify. | | | | | 07-26-2010, 11:55 PM | #8 | | Senior Member Join Date: Jun 2003 Location: Saint Paul, MN Posts: 3,244 |
Curious- what cat did you find that does not throw a code? __________________
My Former Rides
1999 318ti Alpine White, Cali Roof, Dinan goodies
1996 318ti Hellrot California Edition
| | | | | 07-27-2010, 12:14 AM | #9 | | Senior Member Join Date: Aug 2006 Location: Central NJ Posts: 2,440 |
Planning on using a magnaflow with an o2 extender that moves it farther from the exhaust stream. | | | | | 07-27-2010, 12:32 AM | #10 | | Senior Member Join Date: May 2007 Location: LA, Bellflower, CA Posts: 3,613 |
300 hp!? NICE! always good to hear good news while sorting things out. __________________ 
-Theta Chi-
Float like a cadilac, sting like a BIMMER
.... my socket is just too thick and won't fit in the hole! damnit!
Marv's 332ti is in the werks. Stay tuned ya'll  ...
Check list: S52 swap, manual transmission swap, 3.25 LSD with M Coupe diff cover, SuperSprint muffler, M3 style mirrors, AFE intake, ASC delete, M50 Manifold swap, UUC strut bar, ZHP lighted knob, Vaders, M-tech interior, OEM armrest, AC Schintzer front lip, AC Schnitzer rear spoiler, Roof spoiler, 18'' rims, M3 front drilled brakes, LED interior lights, 3 spoke Euro style steering wheel, OEM roof spoiler and bike holder, Thule fairing, Euro tail lights, oil pressure guage, carbon fiber hood painted to original paint (still showing CF weaving), what's next to do...? | | | | | 07-27-2010, 03:45 AM | #11 | | Senior Member Join Date: Dec 2007 Location: Gulfport, Florida Posts: 3,208 |
CAT Delete. Doesn't need one on a good running car, it will pass emissions. My resonators look like cat converters so it's all good. As long as it's "Lean it's clean".
Go 3" from the header to the back with a flowmaster with 2 resonators and you will never be happier. Free flow and no rice or drone. Bad A$$ 4-bangger passing your A$$...
Last edited by xxxJohnBoyxxx; 07-27-2010 at 04:40 PM. | | | | | 07-27-2010, 04:28 AM | #12 | | Senior Member Join Date: Sep 2007 Location: asdfasdf Posts: 10,002 |
| | | | | 07-27-2010, 04:43 PM | #13 | | Senior Member Join Date: Dec 2007 Location: Gulfport, Florida Posts: 3,208 |
^^Nice ^^
So I don't want to change this thread but does everyone but Florida still emission test?
They don't do anything here. No testing of anything, just send in your fee for your plate renewal and they send you a new sticker. | | | | | 07-27-2010, 05:31 PM | #14 | | Senior Member Join Date: Jan 2008 Location: New Orleans Posts: 970 |
we get "brake tags"
pull in, test all the lights, look at the dashboard, they put a new sticker on your windsheild and your done(if all lights work and no dashboard codes) __________________ 
^being rebuilt^
until then:
daily car:
96' Blue DASC'd ti with koni coilovers
slowly progressing...
weekend car:
85 1/2' 944 Porsche
no a/c, p/s, gutted cat, loud as hell exhaust, loud as hell sound system | | | | | 08-30-2010, 06:06 AM | #15 | | Member Join Date: May 2010 Location: CA Posts: 95 |
DAMN! That's it? You guys are so lucky! Here in Cali, the best pump gas we get is 91 octane, and the Smog checks are every 2 yrs, and they hookup into the OBD2 port. If the car has ANY check lights, codes, or wrong VIN (swapped ECU?)... then you fail. Not to mention they do the test w/ the car on rollers (dyno). If you don't pass, you dont get your registration.  I have another car that's way beyond Smogging, but this Z3 I'm building is going to stay smog legal... (which also means I'll never get the most power out of it  ... oh well. That's when I drive the other car ) | | | | |
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