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Re: '89 900 n/a idles, won't rev above 1500 rpm? Posted by RS [Email] ![]() ![]() ![]() In Reply to: Re: '89 900 n/a idles, won't rev above 1500 rpm?, Murph, Fri, 6 Feb 2004 09:13:51 Members do not see ads below this line. - Help Keep This Site Online - Signup |
When the ECU in my '89 SPG indicated that it wanted to be retired, I had a similar problem. It idled perfectly, but when I opened up the throttle the RPMS bounced up and down wickedly. So, be aware that it might be something that dire.
You may be lucky and find that it's something like a badly-pitted fuel pump relay, fuel filter, or a failing fuel pump.
The good news is that there are a few substitutes for '89 ECU. As an example, you could put an ECU from an '88 900S in, but you'd lose the upshift light. '90 NA 900 ECU would be a good substitute.
posted by 63.148.1...
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