Misfiring engine?

Tiny
MRLIONMAN
  • MEMBER
Ok, thanks. Car actually has 210,000 miles on it. Not 210.
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Wednesday, July 29th, 2020 AT 12:00 PM (Merged)
Tiny
MRLIONMAN
  • MEMBER
When I performed the compression test I had removed all spark plugs after engine was warm. Should I have only removed one at a time as I was testing each cylinder and replaced before moving to next cylinder?
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Wednesday, July 29th, 2020 AT 12:00 PM (Merged)
Tiny
HUMPHREY
  • MEMBER
  • 2000 DODGE NEON
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 250,000 MILES
Number 2 cyl spark plug wire poped off and caused engine to run rough and misfire. Put wire back on. Later (2-3 wks) same thing happened again. This time check and changed plugs. I noticed that #2 Plug was very loose and had significant carbon/exhaust soot looking material on the outside of the plug. Changed all 4 plugs. I still have misfire problems at low/ pull away from trafic light speeds. The problem has significantly decreased since changing plugs but is still there. (Does not do it at highway speeds unless under load - going up steep hill) When reading the codes through the odometer it just says #2 cyl. Misfire. Could this be an injector problem or is it a burnt valve?
Thanks
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Wednesday, July 29th, 2020 AT 12:00 PM (Merged)
Tiny
2CARPRO JACK
  • EXPERT
I would replace the wires first. They dont like having the hot exhaust on them. If the misfire continues, we will have to look a little deeper. For now, do the basics. What kind of plugs did you use?
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Wednesday, July 29th, 2020 AT 12:00 PM (Merged)
Tiny
MONEYSAM
  • MEMBER
  • 2000 DODGE NEON
  • 120 MILES
A female friend of mind told me she wanted me to change her spark plugs, she said she got a diagnostic and they told her she had a misfire on cylinder number one what could be the reason for that
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Wednesday, July 29th, 2020 AT 12:00 PM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
Bad plug, bad wire, defective coil, vacuum leak, bad injector or low compression.

She needs a real diag from a shop that can pinpoint the exact failure. Guessing is expensive and in most cases wrong.

Roy
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Wednesday, July 29th, 2020 AT 12:00 PM (Merged)
Tiny
DSLAUGHTER
  • MEMBER
  • DODGE NEON
My wife bought a 2000 Dodge neon from a used car lot about a month ago. The car ran fine until yesterday. She checked the oil and it was low so she added some. When she did the check engine light came on. The car now lopes and acts as if its going to stall. She had dianostic ran it came back (plug no.2 misfiring). She took it to a shop and they checked and said that was not the problem. What do you think the problem is?
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Wednesday, July 29th, 2020 AT 12:00 PM (Merged)
Tiny
CHEVY22
  • EXPERT
What did the other shop say it was and do you have the exact code? Would help

thanks
jim
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Wednesday, July 29th, 2020 AT 12:00 PM (Merged)

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