I know I'm getting fuel to the rail. I'm not sure if it's getting to the cylinders though.

 

pull out the injector and spray fuel all over your engine bay? LoL

 

i think my friend pulled an injector and saw no change in his engine on his 240. thats how he figured which one it was. if it was working fine, after its pulled, you should see the engine bog or shake or just get disturbed in general. i think thats what he did, and it makes sense. im pretty sure its the same concept with checking plug wires.

 

guys you cant just pull and injector....lol where's it gonna get fuel from?

node light ftw

 

bahaha...yea
How exactly does a node light work?

 

Pretty much works like a timing light. Put a little induction coil on the injector wires and then crank it. If the injector has fuel pressure and an electrical signal then it will probably open and squirt some fuel.

Another option: If you keep cranking the engine and it does not start and the exhaust eventually smells like fuel, pull a spark plug and see if it reeks like gas. Then you probably have an ignition issue.

Pirate

 

can you hook up a osciliscope to the injecter wires and read the current? im sure theres some specs for that ****, but like pirate said if spark plugs smell like fuel most likely a spark prob

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by All-Motor-Junkie &raquo;</TD></TR><TR><TD CLASS="quote">can you hook up a osciliscope to the injecter wires and read the current? im sure theres some specs for that ****, but like pirate said if spark plugs smell like fuel most likely a spark prob</TD></TR></TABLE>

you certainly could...the injector pulses are duty cycle varying square wave signals...correct me if i'm wrong....

 

i usually use an injector test light to see if i cam getting pulse to the injectors.

 

Smell test.

and if it fails:

Continuity to each injector and to the resistor box.

and if that doesnt fix the problem:

try a friends ECU and resistor box

Still screwed?

get the injectors tested.

and if that fails:

but a new Prelude.

 

I just use the injector test lights just like a few others appear to be using

 

I don't have access to a node light, so I'm going to try checking alternating current at the injector plugs. However, there are two pins, how should I go about doing this?

 

Ok, I checked the voltage at the injector plugs while they were disconnected. I got a reading of 29.5. I thought the voltage was supposed to be 12v?

 

Like I was saying, they use a square wave AC signal....was that measured with the AC function on the multimeter??

The ecu would be perfectly capable of generating a waveform with that amplitude, though I would like to see what settings you used to test with....

 

The multimeter was set to AC 200.