this is the first time it happened ... i turn the key off and the car ran for 2 seconds... any ideas whats going on? what happened etc.....? i rewired my fan and gauge cluster but didn't not touch any ignition stuff... any help would be awesome

thanks

John

 

bump.. this is driving me crazy

 

bump

 

It the fan. Its momentum causes the dc motor to become a dc generator, back feeding power to what ever you tapped it into, my guess would be some kinda of "hot in run" source thus powering everything in that circut. When the fan looses enough speed it cant make enough power to keep it running. I bet if you turned the key off on the freeway the car would run indefinetly, untill you slowed down enough that there wasnt enough wind to spin the fan.

 

that is what you call dieseling.

what is occuring is that there is still some fuel in the chamber after you turn off the ignition (somehow or another) and that fuel ignites by other means than the spark plugs.

 

its weird because i just started it and turned it off and it turned off fine... the fan never did that before... plus i tapped it into the fan fuse in the fuse box inside hard line like always

 

The stock set up used a relay, this would isolated the circuits from any back feeding.

 

gotcha.. so basically i just need to hook up a relay to the fan switch and i shouldn't have the problem anymore.

 

that would be the idea

 

A car can diesel if the idle is set too high as well I believe.

 

my old motor did that when it was hot because of carbon buildup setting fuel off...and being carbed that meant it kept pumping....

 

Running crappy gas possibly? (87 octane junk)

 

High idle, Running to hot, or timing.