Date: Thu, 21 Jun 2007 21:06:15 +0100 From: johannes <johsnospam-nospaam-fitter.com> Subject: Re: Misfire any thoughts
"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). > 1. The dreaded Direct Ignition cassette (DI). > 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). 2. That is also a possibility. Try to knock gently on the outside and listen for loose material. > 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. This is probably the a rubber pipes that transfer a pressure signal to a pressure sensor. You can diagnose that by listening for hissing air noises in the engine compartment. Fixing is an easy DIY job. I actually just cut off the split end and refitted. > Any ideas, what it may be or which is the best way to identify the problem? > > BTW. Are the recommended sparking plugs for the car NGK or Champion? NGK BCPR7ES-11, and do not even think of fitting any other plug type! The ignition/anti-knock system is designed around this plug. (Driving 1993 9000 CSE 2.0 LPT 135k and still in excellent cond.)
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