1998 Chevy Malibu engine misfires

1998 CHEVROLET MALIBU
150,000 MILES • 4 CYL • FWD • AUTOMATIC
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ADMVALENTINE
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  • 5 POSTS
here it is car drove fine at night then the next morning i got in it asnd drove 100 hards before it died on me engine would start but misfired badly only code was random cylendar misfire ive replaced the plugs coils icm cam sencer crank sencer throtle sencer and finaly today i replaced the brain with one from same year car same engine same exact part numbers on it ect its exactly the same brain and it wont start at all now please help me before i go nuts
Sep 13, 2008 at 9:32 AM
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RHALL77
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whe you replaced the computer you set off the security system. turn the key off for 10 seconds. crank the engine real quick, and watch for the security light to start blinking. when it does leave the car alone until the light stops blinking. this should take between 10-30 mins. when it goes off, turn the key off for 10sec. then try to start it. let me know what happends
Sep 14, 2008 at 7:19 AM
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ADMVALENTINE
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[quote:c55bfad666="rhall77"]whe you replaced the computer you set off the security system. turn the key off for 10 seconds. crank the engine real quick, and watch for the security light to start blinking. when it does leave the car alone until the light stops blinking. this should take between 10-30 mins. when it goes off, turn the key off for 10sec. then try to start it. let me know what happends[/quote:c55bfad666]

Nope that didnt work i believe somone has bypassed the security on this vehicle. any other ideas?
Sep 16, 2008 at 2:41 AM
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RHALL77
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did the light blink at all when you did it
Sep 16, 2008 at 2:44 AM
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ADMVALENTINE
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no but the gas gage spun arround lol
Sep 16, 2008 at 4:34 AM
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RHALL77
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does the light work at all
Sep 16, 2008 at 5:27 AM
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ADMVALENTINE
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yes the light is always on how do i test the egr i hook it to 12 volt positive and neg on the outside of the 5 pins and it jumps but it doesent move at all on the middle 3 pins
Sep 17, 2008 at 4:38 PM
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RHALL77
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  • 3,361 POSTS
you have a security code in the system. any time you disconnect a pcm for the vehicle you set off the security. it needs to be reprogramed to finish and more diagnose on the vehicle.
Sep 18, 2008 at 12:16 AM
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ADMVALENTINE
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  • 5 POSTS
sooo how do i do that then????
Sep 18, 2008 at 2:26 PM
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RHALL77
  • ✓Experienced Mechanic
  • 3,361 POSTS
take it to the dealer
Sep 19, 2008 at 7:53 AM
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