<!-- from fixya rte -->Vibration when turning left 2000 neon - 2000 Dodge Neon

Nikki is the engine light on, are there any codes,have you had a tune up or any other work done lately.when you say it won't start when warm(do you mean engine will not turn over, or does engine turn and refuses to fire.
If I had to guess failing fuel pump, they tend not to build fuel pressure when ran a while(warmed up) and when left to cool build somewhat better pressure.
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Is Your Fuel Pump Going Bad
How do know if its fuel filter or fuel pump that is causing the problem
How To Diagnose Fuel Pump Failure EricTheCarGuy
http://www.clarks-garage.com/shop-manual/ts-01.htm#hot-start

Hello,

Attached is a link that should prove useful. Although it is for a 2002, the procedure will be similar.

How To Replace Starter on 2002 Dodge Neon

I hope this helps!

Give me some more information about this problem. May be i can help.

Check motor mount. This can cause vibration under acceleration.

It sounds like you have a broken motor mount or 2. This happens a lot more with standard transmissions but it does also happen to automatics. Hope this helped, Roger

You need to find out what DTC the vehicle sets when the check engine light comes on. This will help you diagnose the problem. The engine is misfiring causing the rough running concern and probably the vibration in the dash. The DTC will tell you what specific cylinder the misfire is in P0300-304 or if the fuel is metering too lean P0171. Then you can check the appropriate system for a fault. you'll need to get a generic OBD2 code puller (local parts stores sells these things). let me know what specific DTC's you pull and I'll see if I can help you further.

many things check your exhaust 1st then try and tighten all your dash screws if it persists it couldt be a crankshaft bearing if you have a subwoofer and racing exhaust it will definatly loosen all the bolts inside your car after a while

Check the front drive axles and boots. A bad cv (constant velocity) joint can cause this.

sounds like a combo number of things starting bad wheel bearings and bad rotors bad bushings on lower control arm or stabalizer bar (look at the rubber where they join. and check the ball joint on the bottom of the knuckles

This could be a lot of things, CV joint, tie rods, wheel bearings, even loose lug nuts.