Relay for Delayed Shut Off
#2
Instructor
Yes it can. If the relay has failed depending on how it failed it can prevent power from going to the CDI (ignition) box. If you do a search the relay plug can be jumpered to get the car running but then it'll stay running until you remove the jumper.
Edit for more info: When you turn the key on do you hear the CDI box whine? If yes then most likely the delay relay is ok. If no CDI whine when key is on then it's possible the delay relay is bad.
Edit for more info: When you turn the key on do you hear the CDI box whine? If yes then most likely the delay relay is ok. If no CDI whine when key is on then it's possible the delay relay is bad.
#4
Burning Brakes
Join Date: Apr 2006
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Either way, since you don't have one and the car has been starting, you don't need one. Something else is causing your issues.
#5
Thanks. What is the actual purpose of the relay? Even though car starts, I thought it might be easier if I had it. I suspect my fuel injectors are also adding to the problem.
#6
Burning Brakes
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It delays - for a couple of seconds - disconnecting the ignition to the CDI after you've turned off the key. Thus, it will bleed down and burn any residual fuel left in the injector lines. The car will continue to run until the fuel pressure in the lines drops, or until the timed circuit in the relay shuts off the power to the CDI. You'll think the car is 'running on' or 'dieseling', but it's just burning up the rest of the gas.
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#8
Burning Brakes
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It serves no purpose in restarting the engine. My relay had been bypassed by the previous owner when installing MSD ignition, with no ill effects for many years. I've been too lazy to re-wire it back into the equation.