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1996 Ford Mustang Engine Misfires

Tiny
HOTRODT88
  • MEMBER
  • 1996 FORD MUSTANG
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 149,000 MILES
Engine misfires on #2 & #5 cylinders randomly. Spark plugs, wires, coil pack, 2 injectors, camshaft & crank position sensors, & computer have been changed. A compression test has been performed & all cykinders are 125 psi or greater. Checked valve springs & pushrods on all cylinders. I have replaced the new parts as some might have been defective with no improvement in driveability. I have performed an engine diagnostics through OBD II port and it will show misfire on #2 or #5 every time. Has anyone ran into this problem?
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Friday, June 26th, 2009 AT 9:01 AM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Engine misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.
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Saturday, June 27th, 2009 AT 7:04 AM
Tiny
LS WHAT
  • MEMBER
  • 23 POSTS
And also O2 sensors
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Monday, June 29th, 2009 AT 4:58 AM

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