i was driving to my friends to pick him up, when my check engine light started flashing, it would flash for about 15 seconds then stop then start flashing again, is there any specific reason? or should i just run the codes. Im gonna do that anyway but if anyone know what the reason might be based just on that let me know..

the car is a 96 Z34

 

im not 100% sure but i think when the light flashes its no longer an emissions issue and its internal. i used to have a 97 lumina with the 3.1 not sure if thats the same engine. great overall engine only had one problem with it. i was driving to work and the check engine light started flashing, turned out to be a broken rocker arm??? idk what that is but it was like 500$.

 

the car seemed to be running fine though, the only weird thing was that the speedo kinda twitched a bit every now and then

 

thats why i said i wasnt sure what the flashing means, but i would get it checked out cause i always had the idiot light on the lumina"exhaust issues". when it started flashing it got real though, lol

BEST OF LUCK TO YA

 

other day i took it to the shop, and when i started it up i noticed it was missing, checkd the plugs and there was no fire on one of the coils, so i replaced it.. noww i have a new problem... whenever i put down about 3/4 throttle and up, my radio display, my speedo and tach, and a few of my lights start going crazy..? any reason for that Dx i hate electrical problems... i miss my old skylark and its 6 main wires..

 

loose grounds possibly? or bad alternator not giving out enough power to the battery when the engine is under power

 

Usually a flashing CEL indicates that there is a misfire at the time it flashes. You need to check for both existing and pending codes. If it seemed to run ok then I would have to guess the alternator/battery may be giving up the ghost. You can go to AutoZone and they can check both.

 

Well I remeber with my 05 3.8 when I had a bad coil pack it blinked.. And it also Blink when my car dose the Weird (Long hard shift) dont remeber code it was like 18xx or xx18.. Since it has been winter here and in the - weather it hasnt done it.. Only did it in hot weather and when the car was Hot.. Soo its something with the tranny or clogged cat and no one can tell me.....

GOOD LUCK...

 

the flashing cel was a bad coil, but now i have some electrical problems.. i took a video of what my gauges were doing and i can post that.

 

Definately have the battery checked out. Most any auto store can do that. A bad battery - like bad cells will create havok with the electrical system.