Fuel and Engines
Dodge Stratus
Car Stalling Problems

Why would a 2000 Dodge Stratus 2.4 L be sputtering and knocking and driving but hard at higher mph?

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2011-09-13 17:14:28
2011-09-13 17:14:28

Well your question is not clear because of the gramatical errors, but I believe you are asking about knocking and sputtering at slow speeds but consistent and good at higher speeds....well here is my answer to you. The higher speed consistency compared to the lower sputter is probably one of two things or a combination of both or even a third. One, you have a rough idle which can be caused by: bad fuel injectors, bad ECU, or wrong or bad spark plugs. I would recommend that you disconnect your battery for 30 seconds to wipe the ECU and then try to start and drive the car again. If this does not work, then you will need to have a repair shop look at your fuel delivery (including fuel filter, injectors, and even your spark plgs). Your bad combustion can be any of the above and that would explain the sputtering at slow speeds. Now the second problem could be that your transmission is slipping gears and causing the vehicle to sputter and try to get in the correct gear until you get to a higher speed and a gear that is not malfunctioning. The third possible problem is that you Cam Gears are not properly functioning. If you have the 2.4 you have a dual overhead and the 2.7 or 3.0 is SOHC (if i am not mistaken). A DOHC means that you have one Cam opening and shutting for the intake of air while the other opens and shuts for the exhaust. One Cam can be malfunctioning and that is effecting the other which would cause rough idle and sputtering as well. That is all I have for you and any questions can be directed to tony_velociti@yahoo.com Thanks.

AnswerI had a same problem, mine was electrical. You should get a computer test done if your check engine light is on BEFORE YOU DISCONNECT YOUR BATTERY. Otherwise the computer wont test until so many miles driven. my test was Cylinder #2 misfire so i put on new wires and plugs, that did not fix it. I did a test with the brand new spark wires. I pulled the wire on the #2 cylinder (the other end of the spark wire was still on the COIL) and stuck a long peice of copper speaker wire in it. Then I took the other end of speaker wire to the frame and there was hardly no spark at all. The same test on another cylinder however produced plenty of spark. This proved to me that the problem was in the spark and it was not the wire or the plugs because i just changed them ($30.00) It had to be the COIL PACK, so I got one from autozone ($75.00) put it on and fixed the car. CAUTION: The test is dangerous you should us some kind of rubber insulator when handling the live wire and you also want someone else to turn the car over and off.

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The knocking problem you are having is most likely the gas you are using. If you switch to a higher octane fuel it should solve the problem.

Try a higher octane fuel

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A higher octane gas or an after market octane booster. But, if your car/truck is knocking, then something is wrong, either your timing is too far advanced or something more in depth..

Either get higher octane fuel, or retard the timing. That is about the only thing that will help

Elephants are vegetarians ! They don't kill prey (unless you count knocking over trees to get at the higher branches !)

In all states, 0.08% or higher. In some states, .05% or higher.

they are the same thing. "knocking" in an engine is the fuel igniting from the heat of compression of the fuel and the air together. in a desel engine this is how it is suposed to work because it has no spark plugs so the only way to ingite the fuel is by compressing the fuel and the air by a ratio of about 22 to 1. in a gas engine the fuel is ignitied by a spark plug, if you use low grade fuel the explosion can happen too early (before the spark plug ignites it) and cause a knocking noise in the engine whitch can cause dammage long tearm the typical compression ratio for a gas engine is 10 to 1. the more compression you have the higher grade fuel you need to prevent "knocking" whitch is why higher end cars need higher grade fuel because they have higher compression engines whitch make more horsepower with omperable size engines.

No. Responsibility is the key, and safe driving. Not restricting someone who is capable of driving from A to B without any problems.

Knocking is caused by preignition, where the heat in the cylinder causes the gas to ignite before the spark plug does. Try using a higher octane/grade gas and see if the noise goes away.

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Try buying a higher grade of fuel first. Some vehicles require more octane to stop them from knocking. You might also consider putting in some injector cleaner with the first upgrade of fuel to see if that helps and cleans out the injectors.

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Most likely is knocking. Try next higher octane grade of gasoline.

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