WebJul 19, 2013 · 10-03-2005, 08:08 PM. my 2000 focus se, 2.0L SPI, with 82k began to recently run rough at idle then progressed to stalling at longer lengths of idle. The condition starts once the engine warms after 2-5 minutes. I 1st tried gas treatment. I replaced the ignition coil as suggested in the other threads, but it has not improved the problem. WebA faulty pcv valve can cause a number of problems: 1. rough idle or stalling: if the plunger is stuck open, the pcv valve will allow too much air to enter the engine. this can cause a lean air-fuel ratio. should. valve. fast. …
Rough Idle Causes And How To Fix Them
WebThe engine computer expects a certain flow rate from the PCV valve at idle and cruise. If you replace the PCV valve with the wrong one, or the current PCV valve becomes restricted due to varnish, oil, or sludge buildup, the computer won’t know that and the reduced flow will affect engine performance. The key here is that a properly designed ... WebAnswer (1 of 5): Yes it can. A PCV valve is just a controlled vacuum leak, it controls the air (blowby gasses) being drawn from inside the engine to be lreburned. The size of the … flow cleanrooms
Can bad PCV valve cause rough idle? – Wise-Answer
WebCleaning or replacing a clogged PCV valve can fix a rough idling engine. 4. Faulty Spark Plug. Misfires caused by a dirty spark plug or multiple defective spark plugs can often result in a rough-running engine. Spark plugs create the required spark to ignite the fuel mixture inside a gasoline engine. WebOct 3, 2024 · PCV stands for Positive Crankcase Ventilation. This can cause the valve to become blocked and inoperative, or it may start to leak. A PCV valve leak can cause the air-fuel mixture to run too lean, and this will cause a rough idle. What are the symptoms of a bad PCV valve? WebThe PCV valve might get clogged over time, making it ineffective. This obstruction could also cause a leak, causing its air/fuel mixture to get lean and causing a rough idle. Dirty Fuel Injector A rough idle is among the issues you’ll encounter if your fuel injectors get dirty. You’ll also notice a significant drop in fuel efficiency. greek god lyrics conan