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XfireZ51 · 10-25-2008

Harold,

Code 61 is Port Throttle System failure that is set when ECM "sees" the secondary MAP sensor voltage dropping below .6v. That means there isn't enough vacuum to keep the secondaries throttle plates open.
Some questions:
1. Is the secondary vacuum pump operational? Does it turn on with ignition ON?

2. Have you datalogged motor as it runs through the point where it sets SES light?

3. Have you checked to see if vacuum holds when motor is shutdown?

4. Have you tried replacing secondary MAP sensor and checked harness connector?

10-25-2008	#2
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Re: still the same old problem! Harold, Code 61 is Port Throttle System failure that is set when ECM "sees" the secondary MAP sensor voltage dropping below .6v. That means there isn't enough vacuum to keep the secondaries throttle plates open. Some questions: 1. Is the secondary vacuum pump operational? Does it turn on with ignition ON? 2. Have you datalogged motor as it runs through the point where it sets SES light? 3. Have you checked to see if vacuum holds when motor is shutdown? 4. Have you tried replacing secondary MAP sensor and checked harness connector?