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1997 Mercury Tracer Sparks Only in 1 and 4

Tiny
MARKTRA82
  • MEMBER
  • 1997 MERCURY TRACER
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 85,000 MILES
The car was overheated and damaged the head along with piston 4. So I rebuild the bottom end and got a decent used head from a salvage yard. The car ran great for about 1,000 miles then all of a sudden it stopped getting spark in piston 2 and 3. I replaced the coil, plug wires, and plugs and still no spark. I've checked the timing and it's perfect. Compression is 120 in each cylindor. The only thing I can think it could be is the computer. Is there anything that else that it could be? I'm stumped
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Tuesday, February 10th, 2009 AT 12:13 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Sounds like you're on the right track with the computer- the computer picks up the input signal from the CPS and in turn tell the ignition control module which coil pack to fire-
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Tuesday, February 10th, 2009 AT 4:13 AM

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