[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 483: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 112: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 112: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 112: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 112: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 112: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 112: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 112: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 112: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead [phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4752: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887) [phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4754: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887) [phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4755: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887) [phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4756: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887) RS Motorsport :: Classic Speed Restored • View topic - Fuel pump safety switch
Ok Minilight man. I finally had time to do it today and try it out. It half works...
When the engine is running the safety switch is operating with the red light on. Never used to do this. If I then remove the tacho signal wire it turns off. So thats half way there.
Only thing is, when I turn the ignition on and the engine isn't running it's still permananetly on, like a normal relay. It no longer gives that short 1 sec prime.
I've just had a look at how I've soldered it and I'm wondering if the solder has gone through and onto the circuit route that runs through that zenerdiode. Effectively giving it three solder contacts. Or will this not matter?
I've tried pulling different wires off when the ignition is on but the engine not running, i.e. no tacho signal. Any wire pulled off other than the ground wire, i.e. the tacho signal, ignition input, power output; will stop the safety switch relay from working. Oddly pulling the ground wire does nothing except turn the LED off!
There seems to be alot of what I would call "over complication" on this.
There are 2 simple ways to do it without all the fancy little modules etc. which in my opinion is just something else to go wrong.
1. Wire it through your oil pressure switch on a changeover relay, so the fuel pump requires 2 things to operate, ignition power and oil pressure. When the engine is at running temperature the fuel pump will stop almost instantly when the engine stalls. Yes, the fuel pump won't run unless the oil pressure is up and makes it difficult to prime when starting after a period of time (eg: 2 weeks in the shed), but I never like mine to fire unless it has oil pressure anyway. If you want to be fussy fit a momentary overide switch to prime it.
2. Wire from a field wire in the alternator and ignition power to trigger the fuel pump relay. Same deal as above, it requires the alternator to be turning and igniton power for the pump to run. Same overide as above if you want to get fussy.
You mention to remove the first diode before the Zenerdiode and then say put it where the Zenerdiode was. I take it you want me to permanently remove the Zenerdiode?
I owe you a beer. or I'll get one done for you if you'd like...
Whilst I appreciate the many other recomendations on methods of doing this, I prefer this because it's all automatic, it pre-primes, it's simple and works on an engine rotating tacho signal and... it's cheap!
Now I know what to do I can do this for others if they want it...
Thanks for your reply Warren. As Mk1_Oz mentions, the other options suggested could fail as well. In fact anything can "fail." You mention parts won't be easily available. Well I don't know who would have what lying around and to be honest... I wouldn't bug them to borrow it.
This relay is a small solid robust piece of electrical equipment, it's much the same as any other relay..really. In fact it's so non-techincal it doesn't even come near electronic ignition/fuel injection etc etc systems all using far more advanced electronics.
Besides if it "fails" which is so remote I don't think it's worth considering then I'll just grab the two wires that are on it and join them together so it just runs with the ignition on... That's the way I setup my re-wired electrical system... plug-and-play with backups....
I'm very very happy with it and I'm grateful for Minilites help. Anyways have a nice day
I must commend you guys I've enjoyed following this thread as it's given me a good chuckle I myself would have none of this on my own car as it's just more junk to fail!!!!!!