
Ask A Question - Help - Register - Login

99 plymouth neon, Computer says Cylinder2 misfire detected?

Sent to Car Experts September 11, 2005 11:09 p.m.

MY neons check engine light is oh, we put the diastolic pc to it for the reading and it comes up as PO300-random multiple cylinder misfire annd PO302-cylinder 2 misfire detected. What do i need to do to fix this? Also, my speedometer works when it wants to, how do i fix this problem?

Customer (name blocked for privacy)

Status: Closed Value: $5

Answer
September 11, 2005 11:37 p.m. (28 minutes and 45 seconds later)

REPLIED

A cylinder misfire can be caused by a number of things. A very likey cause is just simple tune up parts. If your car has over 60K miles on it and it has original tune up parts on it, replace them anyway, there probably needed. But to check this pull out # 2 cylinder plug wire and look for carbon tracking on wire , it will look like small burns on the wire. Also check the plug gap and condition of it. Also make sure that the wire does not have any oil on it from the valve cover gasket leaking. Restricted injectors can also cause misfires, and may be needed to be replaced. As far as your speedo goes it could be anything from a bad speedo to a computor problem.

AMEDEE -- ASE MASTER TECH -- 98% Positive Feedback on 1036 Car Accepts
ADVANCED LEVEL SPECIALIST

Reply to Derrick
Sent September 11, 2005 11:54 p.m. (16 minutes and 41 seconds later)

i've already done the tune up, new plugs and wires for my 99 plymouth neon. But when you remove the wire from the second plug it continues to "fire". I was told it should stop firing when removed. I have till the end of Sept. to fix this problem, for inspection. So what cause this problem and how can i fix it?

Edited by Customer (name blocked for privacy) on September 12 2005 at 12:11am

Customer (name blocked for privacy)

Info Request
September 12, 2005 5:22 a.m. (5 hours and 28 minutes later)

REPLIED to Info Request

What do you mean by "continues to fire"? where is it firing to. Do you mean the spark in jumping to ground somewhere? Is if from the end of the wire?

__________________
If I was helpful, please click the ACCEPT
button.

Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2710 Car Accepts
ASE Mastertech with Adv level Engine performance cert.

Reply to Hammer Time
Sent May 31, 2007 9:55 a.m. (626 days and 4 hours later)

sorry, got rid of the neon... it was repo'd actually so no more mess with it, thanks for your advice.

Customer (name blocked for privacy)

Think you can answer this question?
Login or Become an Expert

Related Answers:

	DISCLAIMER: You acknowledge that any information you may obtain from individuals you contact through use of the Just Answer service comes from those individuals, not from Just Answer!, and that Just Answer is not in any way responsible for any of the information these third parties may supply. The site and services are provided "as is" with no warranty and no representations are made regarding the qualification of an Expert. Responses and comments on Just Answer! are for general information and are not intended to substitute for informed professional advice (such as medical, legal, investment or accounting) and do not establish a professional-client relationship. Just Answer! is not intended or designed to address EMERGENCY QUESTIONS which should be directed immediately by telephone or in-person to qualified professionals. Please carefully read the Terms of Service.

Just Answer! > Car Repair > Plymouth Questions