timing (valve and ignition), air leaks - Saab 900 Bulletin Board - Saabnet.com
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timing (valve and ignition), air leaks
Posted by Siegfried (more from Siegfried) on Wed, 28 Oct 2009 10:11:37
In Reply to: 86SPG misfire & knock at idle?, Jim86SPG_VT, Tue, 27 Oct 2009 15:38:38
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Jim,
you're saying that it goes well under load, right? And it idles go too, but only if RPM is kept above 2K, aha? So what's the difference to a motor to be run under a load vs idling:
- RPM. Timing: both for ignition and for valves.
- vacuum in the intake manifold (that is fwd'd to the fuel pressure regulator)
That's it, mostly.
Zig
P.S.
Just doublecheck those sparks and wires. Check that metal tip that is screwed onto the spark plug and where the wire is connected to.
I had an interesting issue when a tightened wire (almost coming off the spark plug, there definitely wasn't a good connection there) was giving me an interesting picture: engine run fine at high RPM and under full load, but when idling it was running on two or three cylinders only.
posted by 77.37.1...
Posts in this Thread:
- 86SPG misfire & knock at idle?, Jim86SPG_VT, Tue, 27 Oct 2009 15:38:38
- Re: 86SPG misfire & knock at idle?, Jim86SPG_VT, Wed, 28 Oct 2009 16:24:00
- timing (valve and ignition), air leaks, Siegfried, Wed, 28 Oct 2009 10:11:37 <-- Viewing This Message
- Has this been the issue since you bought it ?, SaabStalker a.k.a F Myers, Wed, 28 Oct 2009 06:21:49
- Re: 86SPG misfire & knock at idle?, tweetiedancer, Tue, 27 Oct 2009 16:03:45
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