Date: Fri, 29 Jun 2007 00:29:38 +0100
From: johannes <>
Subject: Re: Misfire any thoughts

"Charles C." wrote: > > Charles C. wrote: > > Hi, > > > > The car is 9000, 2.0 LPT, year 1997, 100K miles on the clock. > > > > It showed some random misfire a week or so ago. Two days later took it > > to the SAAB dealer who could not fix (not enough time), but replaced > > some split rubber pipes relating to the turbo (?). They think the > > misfire relates to the turbo, as it does not supply high enough boost. > > > > At the time the misfire was only when the engine was under load and > > gentle acceleration (town driving). > > > > ============ > > > > The car is booked to go back on Tuesday (by which time it may well need > > a new catalyst... that will become an email of its own if it does). > > > > The misfire now happens after about a mile from cold (or a bit sooner) > > and it happens even when the engine is idling. I can't see what this > > may have to do with the turbo. > > If it helps anyone out in the future. > > On 2nd take all problems pointed to fuel starvation which could be > caused by a vacuum leak (hence the engine would cut off fuel). The car > became difficult to accelerate but reasonably happy to run with a few > misfires at a steady load. > > However, it was the Direct Ignition cassette that was faulty. On 2nd > visit to the dealer they chanced that this was the problem. I had done > 380 miles with the misfire. The catalyst apparently survived. I am > happy to settle for half the SAAB Experience. 1. Direct Ignition systems are also used by other manufacturers. 2. They last over 60k miles and replacement is a simple DIY job, in fact simpler than changing the air filter (which is tricky on a 9000).

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