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1989 Volvo 240 #4 cylinder not firing

Tiny
JRADZND
  • MEMBER
  • 1989 VOLVO 240
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 163,000 MILES
The service mangr at the import dealership claims my #4 cylinder isn't firing, but seems to think it isnt the spark plug. What should I do since I really cannot afford to have them bill me for 3 hrs to find the problem. If its not he plug, wire, or distributor what could it be? The car idles really rough, but does not stall and runs out really well. Please advise
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Friday, August 21st, 2009 AT 7:28 AM

1 Reply

Tiny
JIS001
  • MECHANIC
  • 3,411 POSTS
If the it is firing then you could have a problem with the fuel injector not firing? If that is the case then they need to figure out if it is the injector itself, wiring, or the control unit at fault? If that is ok they need to do a compression test. If #4 cylinder has little or no compression, that will cause a misfire also and more test would need to be done.
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Friday, September 11th, 2009 AT 10:11 PM

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