1993 Toyota Tercel engine miss

1993 TOYOTA TERCEL
72,000 MILES • 4 CYL • FWD • AUTOMATIC
Avatar
TBIRD
  • MEMBER
  • 1 POST
I have a 93 Toyota Tercel, I replaced cap, rotor,plugs and wires but No.4 cylinder still misses. The plug at No.4 was black others were white, could it be the injector or timing belt as someone told me?
Jan 9, 2008 at 1:34 AM
Advertisement
Avatar
MHPAUTOS
  • ✓ASE Certified Mechanic
  • 31,937 POSTS
  • ASE Certified Mechanic
HI there,

The black is unburnt fuel, three reasons, poor spark, excessive fuel, low compression. You can have the ignition system tested on a oscilloscope, a compression testis a quick check, and the injector would be a suspect if the other two were ok. See how you get on.

Mark (mhpautos)
Jan 9, 2008 at 1:51 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
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.