20 Most Recent 1999 Plymouth Neon - Page 8 Questions & Answers

Have you checked brake light stop switch?

There could be quite a few things that could cause this issue. I recommend that you replace the fuel filter. If that is not the issue, I would then recommend that you pull the spark plugs and visually inspect each plug and replace if necessary. The spark plug wires could also cause this issue, as they will lose the conductive properties needed to deliver a solid charge to the spark plug under hot conditions and while accelerating. I hope that you have found this information to be useful, and if I can be of any further assistance, please let me know. Thank you for using fixya!

Have you looked at the ignition module, or and ignition switch. Not the key switch} ignition switch.

Check for Evap CodesCould be an Evap Vent Solenoid/Valve

check speed sensor on trans

needs a transmission

It could possibly be a bent connecting rod, a bent / broken pushrod, broken spring, loose rocker or even a loose nut...

Hope this helps.....

micro switch on one of the latches has failed

try replcaing your crankshaft position sensor first also listen to see if you hear the fuel pump if u dont then 95 percent of the time the pumps go out its very rare that the relay goes out please update the situation so i can help u further

Are you sure that it is a short. how old it the alternator? Are there added things to the car like a after market radio. How old is the battery?

Sounds like the fuel pressure is low or you have another problem with the fuel system.Depending on the code, I would check fuel pressure with a gauge.Could be a wiring problem with the O2 sensor or a faulty PCM too.

P0443 Code is purge control valve circuit. Go to the driver side near the battery or better yet use the underhood sticker emission diagram That black cylinder is the canister,on it is the purge valve which hoses lead to the intake. make sure the hose are not torn,or leaking or disconnected if it is clear the code rerun the monitor (just drive it its 2 trip),because more likely that would be the code for P0443.Just because its a valve circuit doesnt mean its the valve circuit the ECM sent a command to purge and the MAP did not detect a purge,The ECM doesnt know if it is caused by a bad purge solenoid a disconnected line for the purge (normally closed) so it coded it if you want to fix it it is either the hose of the purge or the valve itself.

could be a bad connection or battery isnt fully charged. What did it do before you changed battery?

Not the spark plugs at all

Unless a wire burnt out,not that
You only get one of them in 50 years of driving

That leaves the ignition module,if you have one
or an individual coil for #2 if that applies

You can not have O2 Sensors in there over 100,000
miles or they slow down or quit. There goes your fuel
trim & thus your misfires as well

Clean your MAF Sensor
Check for vacuum leaks,every where on the car

I know how to convert km,I grew up in Ontario,500 miles
from here in N.J.
Point is ,10 years is too long on those O2 sensors, loose them

the valves will also be bent. Its probably not worth it. thats why it should be replaced every 90K miles with a water pump and tensioner.