Question about 1998 Dodge Avenger

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1998 2.5 engine codes po300,204,108,304,455,442,174,help

Car is running rough has a skip or miss

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Buy yourself an OBD reader and check them yourself or go to a mechanical shop and get them to do it.

Posted on Jan 22, 2013


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There should be stored codes in the computer. Have them read and they should give you a starting point.

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My check engine light came on about a month ago. Code was catalytic converter. Teh light went off/away on its own. Van ran fine to me & made no noise. Sometimes it would miss/skip once it hit 10 mph....

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I don't think the rough running had much to do with oil level, since it started running rough a 2nd time. Check the fuel filter and ignition timing.

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Engine runs extremely rough, seems to be fuel related, new fuel pump & filter installed, pressure good, run 2 bottles of injector cleaner through. Can't get to stay running under load. 1998, chev....

Have you changed the plugs, if any are fouled out or if any are worn, it takes more to fire it under load and may be spark knocking because one of the plugs can't fire off all the gas and cause it to skip or idle rough.

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Rough idle then stalls

Vacume leak or bad idle motor. With the car in park and running with the hood open listen for leaks moving your hand around the different hoses looking for a change in the sounds that you hear. The idel motor also makes the car idel up to 1500 RPM or so right at start-up then idel down, If it doesn;t the idel motor is likly. Check engine light is on when running? Test for codes, Follow code test charts don't skip any steps!.

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1 Answer

At a steady speed motor skips pulls good on hills seems get worse every day

is this skip like a miss does it run rough at an idle try changing the plugs and wires cap and rotor and see if this helps also run a good fuel system treatment through the vehicles intake and gas tank and clean it out could have a lot of carbon build up in the engine this usually helps with performance issues.

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