Question about 1999 Dodge Neon

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Check engine light

I just changed the timing chain its a dohc 2.0l and check engine light is on and it runs ruff as heck till it warms up. Any clue?

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  • Expert
  • 108 Answers

It sounds like when the new chain was put on, it wasnt put on in the right place which would cause the intake and exhaust valves to not open and close at the right time which would cause a big loss in engine compression. you will probably need to get it adjusted

Posted on Dec 01, 2012

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  • Dodge Master
  • 4,514 Answers

U probly disconnectd a hose or wire while fixn ur ride--go bac and inspect--listen for vacuum leaks

Posted on Dec 01, 2012

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6ya6ya
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Posted on Jan 02, 2017

Pyrhyc
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SOURCE: Have a 1997 Dodge Neon

Let me start by saying that my profile says computers, however, I was a mechanic for years. Developed arthritis, and had to find a different career that wasn't so ******* my hands.

The way the timing belt system is designed on these, when the belt breaks or jumps time, it generally causes damage to the valves. I'm also going to recommend a compression check to see if one or more valves were damaged. If you have damaged valves, then this could be the cause for the rough running and the timing code. Start with a compression check and let me know. We'll go from there.

Posted on Aug 12, 2008

Molson02536
  • 3854 Answers

SOURCE: Check engine light

A multi misfire may mean that one or more of the following has happened:
Faulty spark plug or wires, Faulty coil (pack), Faulty oxygen sensor(s), Faulty fuel injector(s), Stuck/blocked EGR valve / passages, Faulty camshaft position sensor, Defective computer.

The engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wire, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the the problems were faulty fuel injectors. 

Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.

Good luck and hope this information helps, keep me posted, be glad to help you get the truck running 100% again. Not sure if your running a K&N air filter, and if you are there may be a flim of oil on the MAF sensor that is making you run lean. You may want to spray down the MAF sensor with a can of MAF cleaner. 

Posted on Jul 02, 2009

wracefans24
  • 1985 Answers

SOURCE: will not start when below 40 degrees cranks and

you need to have the engine coolant switch checked,since the computers rely solely on sensors,the ect tells the computer how cold or hot it is so the computer will make it a rich or lean mixture to start the engine,if it tells the computer that it is 75 degrees the computer will lean the mixture like starting a car in the winter without a choke.

Posted on Dec 31, 2009

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Running ruff


Hi there ace,

There are several possible causes
  • Vacuum leak. Check hoses and connections for a hissing sound.
  • The EGR valve may be leaking
  • The PCV valve may be plugged
  • Air filter may be clogged
  • Fuel pump not delivering sufficient quantity
  • Timing chain stretched/Worn timing gears
All are easily checked. You'll need a timing light for the timing chain check. A can of Carb Cleaner for the valves.

Get back to me with what you find out. We can take it from there. Good luck Ace

Mike

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