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Sounds about right Posted by Ari [Email] ![]() ![]() In Reply to: Re: Need some clarification, Steve Sass, Tue, 5 Apr 2005 08:27:24 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Yup, you did everything right. But the burn-off won't work unless the engine temp is above 65C, and then engine speed over 2500 rpm. Fully warmed up is around 90C. Before you start to suspect the ECU, it would be good to do one or two more tests. It is possible that the engine wasn't fully warmed up, OR the ECU didn't think the temp was over 65C. The way to check this is to stick an ohm meter on the coolant temp sensor. This sensor is buried under the intake manifold, with the connector end facing the firewall. If you think the engine is warmed up, pop the connector off the sensor, and with the meter set to Ohms, measure between the pin on the connector and chassis/engine ground. The resistance should be less than 500 ohms or so. As a data point, 68F (20C), a nice day, the resistance should read about 2280-2770 ohms. If the resistance isn't less than 500 ohms or so, either the engine isn't warmed up, or the temperature sensor is bad.
If the sensor reads under 500 ohms, and you've done the engine rev, it does sound like the burn-off signal from the ECU is missing.
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