jonlabree Posted October 17, 2010 Share Posted October 17, 2010 What can cause a rough idle? It kind or lopes hot or cold. Will not die.Everthing was normal until I came back from Las Vegas. No money leftit better be cheap to fix. Link to comment Share on other sites More sharing options...
DAVES89 Posted October 18, 2010 Share Posted October 18, 2010 I would try Mass Air Flow sensor. Link to comment Share on other sites More sharing options...
2seater Posted October 18, 2010 Share Posted October 18, 2010 What is the IAC doing while it lopes? Is it cycling up and down to try to cover up for something else? I assume no codes apparent? The tap test on the MAF as Dave suggested is a good place to start and you can disconnect almost all sensors and start the engine to see if one of them is sending a bad signal. If you have a reasonable idea of what the idle readings should look like, you can cycle through the ECM data while idling to see if something looks amiss. Was the battery disconnected while you were away? Link to comment Share on other sites More sharing options...
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