Re: Any spark at the plugs?? - Saab 900 Bulletin Board - Saabnet.com
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Re: Any spark at the plugs??
Posted by aalto [Email] (more from aalto) on Sun, 16 Nov 2003 00:08:09
In Reply to: Any spark at the plugs??, RS [Profile/Gallery]
, Sat, 15 Nov 2003 21:06:25
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I'd also say look at the ignition system carefully. If you have a timing light put it on the plug leads and check for a nice regular spark when you turn over the engine on the starter.
I had very similar symptoms to yours. Progressive misfiring under throttle. First only under high throttle and progressing to misfire (and also backfire) under any throttle at all. This all happened over the course of maybe 30 minutes or so. Eventually i could only keep the car idling for 10-20 seconds.
I used the timing light to determine that the engine was losing spark just as it started to die (but was still turning over). From there i proceeded to the ignition tests in the Bentley manual. This allowed me to track it down to the iginition amplifier.
If this turns out to be the problem for you you should know that you can get the amplifier at the wreckers off any mid to late 80's VW rabbit, jetta or golf. ~$10-15. If it has a 7 pin plug it will be exactly the same unit.
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