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lt1 problems

  1. LT1 | LT4 | L99 Engine Tech
    I have a 1993 camaro z28 and for some reason the coolant fan isn’t kicking on. Me and my grandfather work on the car and it can’t sit long or it will overheat (obviously) but I don’t know exactly how to fix the problem because the fans work and run when you unplug the switch near the water pump...
  2. LT1 | LT4 | L99 Engine Tech
    I have a 1994 LT1 swaped into a 83 El Camino. The car will run off of starter fluid but will not run on its own. I have about 50 lb of fuel pressure and the fuel pump relay is working. And I paid someone to disabled VATS in the PCM. Someone cut out the ALDL of the harness so I cannot check codes...
  3. LT1 | LT4 | L99 Engine Tech
    I’ve had it, today at crew car wash my $500 MSD Optispark went out for the third time in the last year and a half. Error code for low and high res showed up. I’m not doing this anymore , what alternatives are there to Optispark that actually work other than the method of using the optical sensor...
  4. New User Introductions
    I have just purchased a car. A 1994 t/a. I have been told that it has been stored, upgraded cam, rear gears have been changed (don't know what gears were put in), headers, and it still has an opti spark system. No changes so far.