Re: yes, but the T5 cat's had 9 lives

Re: yes, but the T5 cat's had 9 lives - Saab 9-5 Bulletin Board - Saabnet.com

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Re: yes, but the T5 cat's had 9 lives Posted by dtech (more from dtech) on Wed, 10 Mar 2004 05:02:56

In Reply to: yes, but the T5 cat's had 9 lives, Dean, Tue, 9 Mar 2004 20:57:03 Members do not see ads below this line. - Help Keep This Site Online - Signup

Dean, I would think that the difference in the T5 occurence of converter and DI failure might tied to numbers:

- Red DIs seem to fail significantly less, and have exhibited much higher % of incomplete, or partial failures.

- It is only under a certain set of conditions that an ignition failure will destruct the converter. When the initial poster recalled sensing a "thump" in the engine, I equate that to an explosion in the converter, destroying it. I think it all happens too quickly for the CEL to be seen:

DI craps out at cruising speed, unburnt fuel from one, maybe two injector cycles enters the exhaust stream, throttle closes (maybe), positive exhaust flow stalls, and boom converter destructs from fuel hitting the hot catalyst elements.

I just speculate that the ECU reacts to the dead DI and then shuts down the injectors and allows the throttle plate to close. I would think it unusual for the converter to destruct with positive exhaust flow (throttle open), but who knows.

posted by 205.187.180...

Posts in this Thread:

Another DI Failure (long), CliffC, Tue, 9 Mar 2004 16:44:11
- Re: Another DI Failure (long), MJ, Fri, 26 Mar 2004 14:15:56
- DI Improvements?, 3PinFever, Thu, 11 Mar 2004 22:49:33
- did the dealer install updated software? (n/m), Jason 0W-40, Wed, 10 Mar 2004 07:36:29
  - Re: did the dealer install updated software? (n/m), CliffC, Wed, 10 Mar 2004 13:06:21
    - Software update info . . ., Mike D, Wed, 10 Mar 2004 17:37:10
  - Re: did the dealer install updated software? (n/m), jw, Wed, 10 Mar 2004 08:53:32
    - two-fold, Jason 0W-40, Wed, 10 Mar 2004 09:57:43
  - Re: did the dealer install updated software? (n/m), jw, Wed, 10 Mar 2004 08:51:15
- Sounds exactly like my problem I posted below, Jeff J, Wed, 10 Mar 2004 06:19:12
- Just curious if you could have put in a spare DI Cass, KB88900T, Tue, 9 Mar 2004 21:44:40
  - Re: Just curious if you could have put in a spare DI Cass, CliffC, Wed, 10 Mar 2004 13:10:59
- Did You Have 30K Service Done Before This?, Ian Glenday , Tue, 9 Mar 2004 18:11:58
  - Re: Did You Have 30K Service Done Before This?, CliffC, Wed, 10 Mar 2004 03:32:51
  - mine happened at 25,000 miles, Aero'ed, Tue, 9 Mar 2004 18:34:25
- Re: Another DI Failure (long), Dean, Tue, 9 Mar 2004 17:05:28
  - I though it was curiosity, Geoff, Tue, 9 Mar 2004 17:44:56
    - Re: I though it was curiosity, dtech, Tue, 9 Mar 2004 17:52:47
      - 1993 n/m, Geoff, Tue, 9 Mar 2004 19:01:21
  - Re: Another DI Failure (long), dtech, Tue, 9 Mar 2004 17:39:11
    - yes, but the T5 cat's had 9 lives, Dean, Tue, 9 Mar 2004 20:57:03
      - Re: yes, but the T5 cat's had 9 lives, dtech, Wed, 10 Mar 2004 05:02:56 <-- Viewing This Message
        Replacing DI - is it a DIY roadside repair, Mike, Wed, 10 Mar 2004 06:57:03
        Re: Replacing DI - is it a DIY roadside repair, Geoff, Wed, 10 Mar 2004 07:08:04
        Re: Replacing DI - should´nt have to happen, Sten, Wed, 10 Mar 2004 10:42:36
        It's a Saab Innovation !, dtech, Wed, 10 Mar 2004 11:27:36
        10 year old Saab innovation, still working the bugs out, sounds about right :-), Wed, 10 Mar 2004 14:22:30
        Re: 10 year old Saab innovation, working on the bugs, compaqted, Thu, 11 Mar 2004 05:44:06
        Re: Replacing DI - should´nt have to happen, DW, Wed, 10 Mar 2004 10:53:56

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Prev by Date: Thanks for the info!, MatthewB, Wed, 10 Mar 2004 04:31:23
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