Can you hook up an LED to the fuel injector pins?
#1
They live We sleep
Thread Starter
iTrader: (1)
Join Date: Feb 2009
Location: Dot Island
Posts: 919
Likes: 0
Received 0 Likes
on
0 Posts
Can you hook up an LED to the fuel injector pins?
Im still tracking down an issue. I cant see much of whats going on at all since i dont have an aftermarket computer.
So What i really would like to do is to see if the injectors cut out at all when idleing by sticking LEDs in the injectors?
Anyone ever try it and would it work?
I know they would have to be in the correct way Since LEDs only run current one direction most of the time.
Unless anyone else has an idea on how to see if fuel injectors cut out Intermintently?
So What i really would like to do is to see if the injectors cut out at all when idleing by sticking LEDs in the injectors?
Anyone ever try it and would it work?
I know they would have to be in the correct way Since LEDs only run current one direction most of the time.
Unless anyone else has an idea on how to see if fuel injectors cut out Intermintently?
#2
HAILERS
Join Date: May 2001
Location: FORT WORTH, TEXAS,USA
Posts: 20,563
Likes: 0
Received 21 Likes
on
19 Posts
You can at the ECU because it's easier than at the injectors.
But at idle, the flashes are going to result in an almost steady light. The gnd pulse happens in ms and a lot of ms stacked together result in a steady LED light.
On the series four, at the ECU, you'd just put the positive wire of the LED into the small plugs wires at the far left of the plug (looking into the wire side of the plug). Then put the other wire of the LED into either the light green wire (fwd primary injector) or the light green/black wire (rear primary).
Then start the engine. While the starter cranks the engine you will see the flash of the LED pretty easy. But once it idles the flash will turn into a steady light display.
If you have a series four car and the idle is in the 750-800 rpm range but seems to mis once and a while at idle, the cure might be to go to the variable resistor and turn it RICHER. That usually smooths out a idle that appears to be *missing* occasionally.
But at idle, the flashes are going to result in an almost steady light. The gnd pulse happens in ms and a lot of ms stacked together result in a steady LED light.
On the series four, at the ECU, you'd just put the positive wire of the LED into the small plugs wires at the far left of the plug (looking into the wire side of the plug). Then put the other wire of the LED into either the light green wire (fwd primary injector) or the light green/black wire (rear primary).
Then start the engine. While the starter cranks the engine you will see the flash of the LED pretty easy. But once it idles the flash will turn into a steady light display.
If you have a series four car and the idle is in the 750-800 rpm range but seems to mis once and a while at idle, the cure might be to go to the variable resistor and turn it RICHER. That usually smooths out a idle that appears to be *missing* occasionally.
Thread
Thread Starter
Forum
Replies
Last Post
82streetracer
1st Generation Specific (1979-1985)
7
08-23-15 09:28 AM
86rxNa
2nd Generation Specific (1986-1992)
2
08-11-15 11:51 AM