1997 Mercury Tracer Sparks Only in 1 and 4

1997 MERCURY TRACER
85,000 MILES • 4 CYL • FWD • AUTOMATIC
Avatar
MARKTRA82
  • MEMBER
  • 1 POST
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
Feb 10, 2009 at 12:13 AM
Advertisement
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Avatar
RASMATAZ
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 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-
Feb 10, 2009 at 4:13 AM