Date: Thu, 18 Oct 2001 11:06:46 -0700 From: Dee <nonetobehadnopsamtobe.com> Subject: Re: Plugging an Injector to Pass Smog Test
In article <3bcd905e$0$30972$272ea4a1nopsam.execpc.com>, davehinznopsamcop.net says... > > Does anyone have any better suggestion for taking cylinder one out of the > > emissions equation? > > Hm. My first impression is "no", and here's why I think that. 1985 - if > that's still a CIS injection system (anyone know? With the round plate, > not the air mass meter?), then the amount of air going through meters the > amount of fuel which is let through the valve. Unless you *also* were to > decrease the fuel pressure by 25% (causing who knows what else to go wrong), > then the fuel destined for your bad & shut down injector, would just end > up making the others 33% over-fueled. I was afraid of something like that. Evidently, since it's an 8 valve engine, it is a CIS type system. How would I know for certain? I'm not a Saab mechanic (just a old hot rodder from olden days) and my Haynes manual got terminally messed up by water damage. I'd like to give it a try if it doesn't cause the pump to blow up or something like that. I would imagine that it can compensate because injectors can get plugged under some circumstances. > If it's an air mass meter type system, maybe, *maybe* you could just pull the > injector's electronic connector. I think that it would be happy to tell the > injector to open, but it just wouldn't. Not sure what the long-term effects > of running this way (other than the obvious loss of power and smoothness), > but I can't imagine it'd be real pleasant. This engine runs rough at startup but once it warms up a few minutes it runs just fine. I still don't know why that would be but it's probably something to do with the dynamic nature of the fuel control system. I was even thinking I could put some kind of solenoid valve inline on that line so it would cut the fuel supply at idle and switch on at higher rpms. One final, "stupid" question. Is cylinder #1 considered the cylinder closest to the firewall or the radiator in a Saab? Like I said, I only drive this car a few miles a week for things like groceries, etc. so I'm hoping I can get it just to pass. It doesn't have to run like a Swiss clock. Thanks!
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