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Not really.
Posted by John Myers [Email] (more from John Myers) on Wed, 19 Oct 2011 16:44:33
In Reply to: Re: Limp- home will always set the CEL., BB, Wed, 19 Oct 2011 16:21:32
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If it did it would likely also set the CEL. When you turn the key on, the ECM checks the plausability of both sensors compared to ambient temperarure and the Manifold Absolute Pressure sensor. If there is a big difference a fault code is generated.
You may have a small vacuum leak somewhere or a fuel delivery problem. Your ECM may be trying to run the engine richer or leaner and then resetting it makes it start differenly. Someone with a Tech2 and some knowledge can find small problems like that which are enough to cause trouble, but not big enough to set the CEL.
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