Question about 2001 Dodge Neon

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Neon has a rough idle and shakes bad i put new plugs wires and coilpack on it got a lil better whats next. ther is also a lil horsepower loss. i tried fuel cleaners and additives but still does this. it almost feels like the cars choking out

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Change the timing belt slack will cause horepower loss

Posted on May 08, 2010

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Car momentarally shutters at all speeds and gears more and more frequently after it is warmed up. You can feel it slightly at idle.


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Oct 29, 2015 | 1995 Dodge Neon

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What would cause truck to shake very hard or rough when starting?


I really need to know the mileage.....?..also the question isn't very clear ...Is the whole truck shaking roughly or is the engine shaking roughly or is it both the engine and truck shaking..?..Since I am not sure I will answer what I can....Ok......If the truck is shaking while sitting still at idle the engine/trans mounts could be worn and or loose mounting hardware...If the engine is running roughly at idle causing all to shake that bad it could be a number of things causing it as usual...Quite often a faulty plug wire/and or bad plug will make it have a misfire because it will be running on only 5 cylinders..If that's the case it could be more than one bad...A vacuum leak will cause it to perform in the same manner...however all cylinders will be firing..Normally a vacuum leak is easy to pinpoint..however it could be a faulty IAC valve..(IDLE AIR CONTROL)..The idle air control is designed to hold a high idle at start up then slowly bring idle down to proper Rpm.....A faulty TPS (THROTTLE POSITION SENSOR) will also cause a rough running problem..And let's not forget the O2 sensor..(OXYGEN SENSOR)..The O2 sensor controls air/fuel mixture...and yes an exhaust manifold gasket will make it run rough but not too bad...It has a rough running sound more so than causing it to horribly shake..It will shake but not to bad..
it is located at the exhaust side of engine..The exhaust manifold is mounted to the engine exhaust port..the exhaust pipe is mounted to the exhaust manifold and the muffler/cat converter is mounted to the exhaust pipe...You can check the plug wires quickly..With engine running carefully remove plug wires 1 at a time..If the sound of engine gets worse the wire you removed is good..after verifying it is good or bad plug wire back on then pull the next wire..and so on..If you pull a wire off and there is no change in engine operation that is the bad wire..If that is the case change all plugs and wires...One at a time..(It is a good idea to make sure all wires come off easily before starting engine..old wires will come apart easily..grasp wire tightly at boot and twist left to right while pulling..)as far as the other components I spoke as well as many others,the best,easy way is to have it hooked to a scanner and they can check/test all components for proper operation...Now..If it runs good but is shaking the engine/trans mounts are worn as I stated earlier..any loose engine component will cause an engine shake also but you should notice it at a glance...engine mount bolts/nuts being loose can be tightened without changing mounts if caught in time..Trans could be coming loose.also worn clutch will cause vibration...Send more info and I can guide you to remove and replace any faulty components you may find to save you money.........Brooks/Metalpoet.....

May 17, 2014 | 1993 Chevrolet S-10

1 Answer

1987 Nissan D21 with a Z24 motor: Continuous stalling at idle, runs when choked using a rag or hand, has new plugs, wires, distributor cap, rotor button, fuel pump, will not idle unless choked, i do n


need to clean the idle jet out in the carb. you need to take the carb float chamber apart and you will see 2 copper jets. unscrew one jet at a time and clean them out. screw back firm not to tight. wile open clean the filter out of the main fuel line if its black replace with new one or leave to soak in some white vinegar and brush with a old tooth brush put new seal on float chamber and put back on engine. see if its fine then it should be.

Jan 19, 2014 | Cars & Trucks

1 Answer

Dear sirs...HELP!!!! ok we had issue w/ code P0303 and replaced plugs & wires...ran better when started up until I got ready to drive around block to test drive...idle seemed little rough when in park...


p0303 is cylinder 3 misfire. Check that plug, boot and coil. . You can move this coil and boot to another cylinder to see if the code changes. If it does, you have a bad coil or boot. Its most likely the spark plug boot on cyl 3.

May 02, 2011 | Ford Taurus Cars & Trucks

3 Answers

97 buick lesabre 3.8 Idles rough and stalls out.


Fuel injectors go bad on these engines, you can find re manned ones for 30 bucks. If you have an engine light on get that read. Change your coil/wires/plugs also. Is the lower intake manifold gasket leaking coolant yet? You may want to get that replaced also. Check the TPS too (throttle positioning sensor) those will also cause your engine to act up

May 08, 2010 | 1997 Buick LeSabre

1 Answer

Car idles rough in park also runs rough in overdrive


Sometimes a rough idle like that is a fuel filter. As you've already done the plugs and wires the fuel filter would be my next bet.

Mar 15, 2010 | 1993 Buick LeSabre

1 Answer

Service engine light


first thing is to go to autozone. get a free check engine diagnostic. they will tell you whats wrong. could be plugs, wires, distributor cap, egr valve, bad gas....could ba a lot but they will tell you better

Jun 21, 2009 | 1996 Dodge Neon

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