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1997 Ford F-150 Rough idle, engine lopes

Tiny
ZEDMAN57
  • MEMBER
  • 1997 FORD F-150
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 482,000 MILES
Engine idle is very rough and it lopes and sometimes it cuts out. I've replaced the plugs and wires and it still idles like crap. I connected a timing light to #1 cylinder and found that the spark cuts out and is the same for all the other cylinders when I checked them the same way. When I drive on the highway there are no problems it seems to run fine, but around town its a little rough. Could it be the coil pack or ignition module. Please help !
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Thursday, February 26th, 2009 AT 7:10 PM

2 Replies

Tiny
RANGERDANGER17
  • MEMBER
  • 224 POSTS
The ignition module either works or it doesnt the coil pack could be the problem
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Saturday, February 28th, 2009 AT 1:50 PM
Tiny
JOHNNIEANDPAM
  • MEMBER
  • 2 POSTS
Could be leak in vacuum line or intak gasket
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Saturday, February 28th, 2009 AT 8:16 PM

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