Question about 2003 Dodge Neon

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When you first start it idles fine but once you give it gas and let off it will die. 2003 DODGE NEON IDLES FINE BUT RUNS ROUGH WHEN PUT IN GEAR, HAS 60 # OF FUEL PRESSURE AND TURNS PLUGS BLACK.

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Hi and welcome to FixYa,

Initially, the black plugs is significant. If it is carbon black, then it is indicative of an over-rich, air/fuel mixture. If it is oily, then this is often caused by piston rings or cylinder walls that are badly worn.

If it were air/fuel mixture, then the correct procedure would be to have the computer scanned for errors. Thereafter the indicated error codes could be deciphered and the indicated probable faults inspected/replaced. A major tuneup would greatly help correct most of the air/fuel mixture issues.

On the other hand, if the sparkplugs are oily black, then you may have to reconsider your options as that entails considerable engine work.

Good luck and Thank you for using FixYa. Happy Holidays.

Posted on Dec 22, 2008

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My advice for you is to do a tune up change pcv, spark plugs, air filter, gas filter ect.. do you have a check engine light on? it sound like a TPS problem good luck and happy holiday
The throttle plate is a valve inside the carburetor or
fuel injection throttle body that allows air and fuel (or
air only in the case of multiport fuel injection) to be
pulled into the engine by intake vacuum when the gas
pedal is depressed. The throttle opening determines
the engine’s power output, so monitoring the position
of the throttle gives the computer information it needs
to determine engine load. This information along
with input from other sensors such as the manifold
absolute pressure (MAP) sensors and temperature
sensors, then is used to calculate the engine’s fuel
requirements, spark timing and other functions.
if this sensor is faulty it will give the wrong signal which can cause this problem but yet a gain if you have no check engine light do a tune up.

Posted on Dec 22, 2008

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Hi there
There are 3 things you must do here: Take a look at the head gasget (this can cause low pressure and oil to leak from the spark plugs), replace the spark plugs and make sure the timing belt is timed right

kind regards

Posted on Dec 22, 2008

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