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1997 Ford Truck Misfire on #3 and # 4 cylinder

Tiny
MICHAEL191
  • MEMBER
  • 1997 FORD TRUCK
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 68,000 MILES
The car was running fine, but gas mileage was slipping so I took it to the shop for a tune up. New wires, plugs, pcv valve and fuel filter. Took it home 1 day later a misfire started. Took it back to the shop they are not sure what is going on. For some reason #3 and #4 are misfiring. Please HELP. Thanks
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Thursday, September 10th, 2009 AT 6:33 AM

3 Replies

Tiny
RACEFAN966
  • MECHANIC
  • 5,029 POSTS
If you would have them or you ohm the injectors for those cylinders. It may be that you just happened to loose the injectors. Also have them or you ohm the plug wires to those cylinder too. Get back to me with ohms readings and with the wire give the wire length with the ohm readings for the spark plug wires. Get back to me and we will take it from there.
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Thursday, September 10th, 2009 AT 10:28 AM
Tiny
MICHAEL191
  • MEMBER
  • 2 POSTS
We found the problem with my 97 Thunderbird. The PCM was bad.
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Wednesday, September 16th, 2009 AT 7:46 AM
Tiny
RACEFAN966
  • MECHANIC
  • 5,029 POSTS
Well that would been the next check if the injectors ohmed out ok. So great job glad to hear it. If you have anymore questions feel free to ask. Thanks.
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Wednesday, September 16th, 2009 AT 9:56 AM

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