Since you've replaced everything else associated with the ignition, try replacing the crankshaft position sensor. I'd bet that's your problem.
I had this problem and took my 1990 cavalier to a shop. Nothing came up on diagnostic so they decided my ignition module and coil packs needed to be replaced. This fixed my problem but costed me around 450.00!
Because something on that supply line has a problem
Carb adjustment or computer problem depending on equipment and year
either you are not using correct thermostats,or putting them in upside down,or thermostat is NOT the problem
alternator needs to be replaced. battery also might be a problem due to the alternator not charging it
its not your ignition its your crankshaft sensor that's the same problem i had.
I have 2008 and had same problem the ignition had to be replaced was really fast less than an hour they did it.
Wow, um, just wow. Anyway, did the engine crank over before replacing the computer? If so, during the process of replacing the computer did you create a problem with anti-theft or did you forget to reconnect the battery?
I had this problem on my disco 1. Turned out to be the alternator, which was replaced and the problem was fixed.
mine did that and i replaced the crank shaft sensor,problem was fixed
Fuel pump, bad ignition coil, computer problem.
are all the connection plug in on the switch and did you have fire before replaceing switch