Rick's Free Auto Repair Advice

Posts Tagged: rolling idle

Rough idle Ford Focus hesitation surge

Fix rough idle hesitation surge Ford Focus TSB 07-10-7 Ford has issued a technical service bulletin (TSB) 07-10-7 to address problems with a rough idle, rolling idle, or induction backfire on 2003-04 Ford Focus SVT models. They may also exhibit a hesitation or surge at a steady cruising speed. The problems usually occur after a cold start. Ford has identified one source for these problems. Direct your attention to the clamps at the intake manifold. Poor intake clamp sealing can cause separation at the rubber boots. Start by inspecting the … Read More

Bad idle air control valve

Bad idle air control valve symptoms Idle speed goes up and down or high idle First off, this is a fairly common problem for all makes and models. Sometimes the problem is caused by a gummed up or sticking idle air control valve (IAC) or a dirty mass airflow sensor (MAF). But it can also be caused by a vacuum leak. How an idle air control valve works If you’re familiar with older carbureted cars you remember that you turned a screw to set the idle speed. The screw turned … Read More


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