2002 Ford Focus engine check light on

Tiny
CYRILBRAINS
  • MEMBER
  • 2002 FORD FOCUS
  • 1.6L
  • 4 CYL
  • FWD
  • MANUAL
  • 93,543 MILES
Engine check light is on after engine went off at gear four. The engine vibrates now and I have detected one spark plug not working. When scanned with a scanner it reports a p0400 code and both cylinder 2&4 misfire. The noise fron the exhasut is also noticeable as compared to the usual silent nature. The engine is a z-tech
Monday, December 29th, 2014 AT 12:01 AM

5 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
You already know you have a misfire on both 2 and 4. Now you have to determine the cause. First determine whether it;s lack of spark, lack of fuel or lack of compression causing it and then go from there.
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Monday, December 29th, 2014 AT 2:13 AM
Tiny
CYRILBRAINS
  • MEMBER
  • 4 POSTS
Ohk so now we replaced all spark plugs but when number two cord is pulled out the engine does not change sound do anything. Unlike the other cords to different cylinders. Could it be a problem with the ignition coil?
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Monday, December 29th, 2014 AT 9:32 AM
Tiny
CYRILBRAINS
  • MEMBER
  • 4 POSTS
Ohk so now I have replaced all spark plugs but when number two cord is pulled out the engine does not change sound do anything. Unlike the other cords to different cylinders. Could it be a problem with the ignition coil?

With the new plugs the vibration or breathing sound of the engine has reduced but still exist.
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Monday, December 29th, 2014 AT 9:35 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
You are going to have to use a spark tested to determine if those cylinders are delivering spark.
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Monday, December 29th, 2014 AT 3:23 PM
Tiny
CYRILBRAINS
  • MEMBER
  • 4 POSTS
Thanks, after I changed my ignition coil together with the cables the problem is solved. Sound of engine is back to normal and no more vibrations but now ma exhaust looks dark (dirty). Guess after an oil change and some miles of driving will get back to normal
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Wednesday, December 31st, 2014 AT 11:07 AM

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