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check engine light

  1. Engine Management Systems
    I have a 1990 fox as my daily driver, it has a 3in Anderson Power Pipe, Pro-M 92mam, Explorer intake, GT 40P heads, 24Lb injectors, Lunati cam, BBK headers, Proform roller rockers, FRPP OE hydraulic roller lifters, 3.73’s, Griffin Dominator radiator, Mac X to Flow Master mufflers, and SCT 4-Bank...
  2. 5.0/5.8 Engine Tech
    Im curious as to why my CEL rarely ever comes/stays on eventhough I have codes that the ecu is recognizing??I have verified the CEL functions and no bulbs/electronics are blown,etc....So what causes this??
  3. GT & SOHC
    I have a 2001 Bullitt and all of the warning lights on the right half of my gauge cluster no longer illuminate when starting the vehicle (traction control, parking brake warning, ABS, and check engine). The seat belt, battery, theft, and air bag lights on the left still illuminate on starting...
  4. Engine Management Systems
    Hey everyone, I have 1990 mustang lx 5.0 and my check engine light comes on when accelerating lightly when my engine is cold once it warms up the light goes away. It does not stay on just when I'm accelerating lightly from 1500 to 3000 after that it goes off. I bought an actron obd1 tester and I...
  5. 5.0/5.8 Engine Tech
    It's really weird, the check engine light comes on about 1 after I fully complete my shift. Like after 2nd or 3rd, whatever. But after or around about 3000rpm's, it shuts off and then comes back on again, I have no idea what's going on. I thought o2 sensors, but when it is in neutral the check...
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