Anti theft keeps going off then on .. is their a simple way of reseating the ECM or the PCM ? i have tryed the batteir trick still the anit theft truns on.. also an i get spark form the spark plugs coil worken but the gas pump dose not come on.. can i get a key fob from some automotive store or something

SOURCE: Chevy Tahoe 2004 Anti Theft Device has been activated.

leave the key on for about 5 to10 min then try to start. Are reset to computer by leaving the key on for 10 min and try to start the vehical.Do this procese 3 time then it shold reset

SOURCE: Problems with the anit-theft

changed intake gasket.Theft light stays on.will crank,but not start

SOURCE: My 1997 Chevy lumina won't start (anti theft)

use the valet switch that most systems have and that will over ride it

SOURCE: the number 3/6 coil pack

try replacing the module which is located under the coil packs.

Joseph Lathem

• 5 Answers
• Posted on Feb 14, 2011

SOURCE: no gas, no spark, 1991 chevy cavalier 2.2l 4cyl

This is an all too common problem with the Cavalier and other GM J-body cars. Usually it is because of the crankshaft position sensor or the harness going between it and the DIS (aka ignition module). Without the DIS seeing a signal from the crank sensor, it doesn't know when to trigger fuel and spark.

Sometimes this can also be caused by a faulty ignition switch. The switch will allow you to "crank" the car, but it doesn't make the proper connections for the ignition system, so the car never actually runs.

The previously indicated oil pressure switch could also be causing the problem, but if you hear your fuel pump run then it's OK.

Hopefully this helps. If not, your Cavalier is as messed up as mine and probably not worth fixing.