lsdweb
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| posted on 29/4/08 at 07:33 AM |
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Injector LEDs
Hi All
I'm trying to get my engine running properly but having some problems.
I'm trying to check that the injectors are firing as they should and I've seen, somewhere, LEDs used in the back of the injector plug to
light up whenever the LED is powered. I've got a pack of LEDs and a bundle of resistors - can anyone suggest the best way of doing this.
Could I do the same for the coils too?
Regards
Wyn
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Agriv8
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| posted on 29/4/08 at 07:44 AM |
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Wyn,
I have used LEDS on the Low voltage side of my V8 Coils to ensure that i was getting them in the right order ( 4 waisted spark units ) .
I would not know about the injectors hope some one will answer shortly as i would like to move from batch fire to sequential at some point and it
would be useful to know.
regards
Agriv8
Taller than your average Guy !
Management is like a tree of monkeys. - Those at the top look down and see a tree full of smiling faces. BUT Those at the bottom look up and see a
tree full of a*seholes .............
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lsdweb
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| posted on 29/4/08 at 07:46 AM |
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Thanks Agriv8
That's what I'm tryiing to do! Did you just wire the LED across the live feed and switched return of the coil?
Wyn
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Mr Whippy
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| posted on 29/4/08 at 07:47 AM |
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oh flashing LED's on your engine, very chav 
Fame is when your old car is plastered all over the internet
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theconrodkid
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| posted on 29/4/08 at 07:50 AM |
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its called a noid light,basically an led in a casing,lucas part no ywb185
who cares who wins
pass the pork pies
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paulf
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| posted on 29/4/08 at 08:50 AM |
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You can buy 12v leds that do not require a resistor, these could be wired directly across the injector plug , dont know if the back emf from the
injector coil would damage them though.Or you could try your leds with a resistor of about 470 ohms in series.
I think maplins would have them.
Paul.
[Edited on 29/4/08 by paulf]
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britishtrident
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| posted on 29/4/08 at 10:34 AM |
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In the same vein but even more useful you can buy blade fuses with an led that illuminates when the fuse blows.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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clairetoo
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| posted on 29/4/08 at 11:23 AM |
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quote:
Originally posted by britishtrident
In the same vein but even more useful you can buy blade fuses with an led that illuminates when the fuse blows.
Um............I can usually tell when a fuse has blown 
Good idea if you have a lot of fuses though .
Its cuz I is blond , innit
Claire xx
Will weld for food......
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Mr Whippy
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| posted on 29/4/08 at 11:36 AM |
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quote:
Originally posted by britishtrident
In the same vein but even more useful you can buy blade fuses with an led that illuminates when the fuse blows.
Fame is when your old car is plastered all over the internet
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lsdweb
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| posted on 29/4/08 at 12:24 PM |
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Thanks guys
I'll try the LED and resistor option tonight.
Mr Whippy - I'm not aiming for the chav look as four LEDs will add to much weight to the car!
Wyn
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Agriv8
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| posted on 29/4/08 at 12:53 PM |
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Oh just in case.
LEDS need to be connected the right way round !!!!.
I learnt that lesson !!!
Regards
Agriv8
Taller than your average Guy !
Management is like a tree of monkeys. - Those at the top look down and see a tree full of smiling faces. BUT Those at the bottom look up and see a
tree full of a*seholes .............
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sprouts-car
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| posted on 29/4/08 at 01:29 PM |
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Like this?
Chris
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rusty nuts
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| posted on 29/4/08 at 07:13 PM |
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Get a logic probe , cost about £6.00 had one for years and find it very useful and cheaper than a noid light.
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lsdweb
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| posted on 29/4/08 at 08:41 PM |
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rusty nuts
I left work early, drove 30 miles to Maplins, picked up a Logic probe, got to the till and realised I'd left my cards at home - no cash!
I rigged up two LED's and tested all the injectors then all the coils - everything worked in the pairs 1&4 and 2&3. Then I tried the
coil and injector from the same cylinder and they were flashing together! So, me thinks this is wrong, I swapped the leads over and now they are
firing as they should be.
Sadly, battery is flat and jump battery isn't holding charge.
Will try in the morning.
Claire apologies for saying 'guys' earlier btw!
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