Re: '86 SPG ECU question - Saab 900 Bulletin Board - Saabnet.com
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Re: '86 SPG ECU question
Posted by Rob Hise-Denk [Email] (more from Rob Hise-Denk) on Thu, 16 Aug 2007 23:44:08
In Reply to: '86 SPG ECU question, Cliff, Thu, 16 Aug 2007 19:02:42
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It's almost like they wanted the ECU to be the single most confusing part on a C900 as far as interchangeability.
The -538 that you mentioned is the one from an 87-88 turbo, so there's no point in grabbing the one from the 87 as long as the one in hand works. That doesn't mean that it won't work in an 86, but if it does you might have driveability or gas mileage issues.
It may be a quick fix, but it would be advisable to find the -537 unit, which was only used in 86.
Here's a link to a chart that lists part numbers and such for further reference (2.5 fuel pressure regulator=turbo, 3.0=naturally aspirated):
posted by 24.21.1...
http://homepage.mac.com/ljwest/test/LHparts.html
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