Cleaned maf sensor put new plugs and wires on and it still idles rough
You need to have the car scann the ecu and see whtat code show posible you have problem whit coil pack or sark wires or ignition module
SOURCE: 1996 Ford Taurus Chugging MAF
You need to check for an intake leak, use a can of carb spray and spray around the top of the engine, if a leak is there the engine will change speed when you get near the leak with the spray.
Remember a sensor trouble code does not mean the part is bad, it means there is a problem with the signal from that sensor, it can be the sensor or the wiring to name a few. For instance a bad injector can give you a O2 sensor code.
SOURCE: I have a 1997 Mitsubishi Galant with rough idle
I am having the same issue on Mitsubishi Galant 02. Clattering on acceleration, herky jerky idle. Pulled a code multiple cylinder misfire. My mechanic's diagnosis is bad valve cover gasket causing oil to seap into the spark plugs and bad timing belt, which I have not replaced at 150k miles. I do however know my fuel injectors do need cleaning, he hasn't ruled that out either. Have you pulled any code on it? I have read on engine knock sensor going out on some of these also. Hope this helps some.
SOURCE: My 2003 Ford Escort ZX2
2003 zx2,rough idle when stoped and the car in drive,runs fine on open road,while idleing i opened the hood,when i loosened the oil fill cap i heard a pufffff,like a relief valve,it should not be building pressure should [email protected],please
SOURCE: 2001 GMC Jimmy Idling rough
I know the post is old but this is for the people who have the same problem like me and still search the web for a solution. P0300 random misfire code, rough idle after it warms up and then exhaust smells like eggs. Check the plugs 5 and 6 should have black carbon (rich fuel) plugs 1 to 4 look good. The problem was for me the Fuel Pressure Regulator. You will have to remove the air plenum to get to the fuel injector spider. Not difficult just follow a repair manual. You should notice the intake under neat will have a blackened appearance for intakes 1 to 4 and 5 and 6 will look clean. The regulator is venting the fuel and it is running down into 5 and 6 hence the fouled spark plugs. The regulator is on the back of the spider and easy to replace the biggest problem I had was getting to the fuel lines to disconnect them. Runs great now.
SOURCE: 99 ford escort zx2 cleaned maf sensor, still
listen up! here is the solution I have had to replace two of them on two engines and they are always missed diagnosed by dealers because the techs these days dont understand the basics of a 4 cycle gasoline engine and they use scanners to find problems, instead of checking for fuel, spark, compression, and vaccum.
On the under side of the intake manifold (accessisble only from the underside of the car) you will find a 3/8 inch vaccum line that goes all the way around the engine to the pcv valve on the front of the engine just below the valve cover. This hose rot's right at the intake manifold nipple. this happens because of the heat coming off the exhaust manifold that is very close. So becareful when inspecting. Its avalible from Ford for aproximatly $20.00. have fun and tell the dealer to shuv it.
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