Re: surging at 1500RPM, with video of problem - Saab 900 Bulletin Board - Saabnet.com
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Have you established whether you're seeing a fuel, spark, or air problem?
Fuel: does fuel pressure hold as you cross 1500rpm? Do you happen to have a noid light or something similar you can connect inline with the injectors to see if they are continuing to fire?
Spark: do you have an inline spark tester to show you if ignition is cutting out as you cross 1500rpm?
Air: Sounds like you've got that checked out.
I think Siegfried is probably on the right track with the ICU or LH ECU, but it could also be the Hall sensor in the distributor, or the distributor itself. Potentially also a clogged fuel filter. I think testing the injectors and spark plugs will get you pointed in the right direction.
posted by 12.195.130...
Posts in this Thread:
- surging at 1500RPM, with video of problem, scottinalaska, Wed, 27 Jun 2012 02:32:28
- Further fuel pressure update, scottinalaska, Thu, 9 Aug 2012 10:33:24
- update, scottinalaska, Wed, 4 Jul 2012 03:15:29
- Ever cleaned the throttlebody?, drupchen, Fri, 29 Jun 2012 15:08:02
- Re: surging at 1500RPM...ECU, MC
, Thu, 28 Jun 2012 19:01:23 - That's the most crazy weird thing I saw yet, vvack0matic
, Thu, 28 Jun 2012 18:20:02 - Re: surging at 1500RPM, with video of problem, Justin VanAbrahams
, Wed, 27 Jun 2012 13:32:36 <-- Viewing This Message - Re: Have you tried disconnecting the MAF from..., Street, Wed, 27 Jun 2012 12:01:49
- my bet: ignition amplifier or LH ECU, Siegfried, Wed, 27 Jun 2012 05:25:02
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