Right now I have a L98 engine waiting to go in my car (after i save up for a few more mods) And I wanted to know how i can find out if the injectors are good or not? Should I send then out to be refurbished?

 

Do a search for testing injectors. You'll most likely find your answer there. Most test that you can do on the car will tell you if the current is within spec from one injector to another or Wether the injectors are firing at all. But to know if there clogging or leaking you usually gotta pull em and have them tested. If they have more than 100K mi. just plan on getting new ones. Theres better designs out now than were available when ours were made you might as well upgrade.

 

If I were you, Id send them out to Rich@cruzinperformance.com


He does great work! Esp if your injectors are on the older side, I'm sure they could use a cleaning.

 

I did mine at home... first I checked the ohms and they were all very close.. then I cleaned 'em..
I made up a small holder using aluminum angle and this held the injector secure, on the 'output' I ran a fuel line to a can of injector cleaner that I used a refridgerant can 'side-tap' and placed it near the bottom of the can.
I then turned on the valve which supplied pressurized cleaner to the injector (I used a hose clamp to hold the hose on and a clamp to secure the hose as well). I then used a common 9volt battery and 'triggered' the injector (you don't need to worry about the polarity of the battery) don't use full 12 volts.
You will hear the injector 'click' and the cleaner will run through the injector in reverse. I always have it blow into a white rag so I can see how much gunk has been blown out. Click it until you are satisfied it is nice and free
You can even hook up in non-reverse mode to check the spray pattern.
I also used compressed air to really blow it out but not really needed unless they are real dirty.
People may scoff at my 'backyard' method but it cleaned them up like new.
If you choose to be as crazy as me and want to do this remember to use safety goggles, do it away from flames (best outdoors) and to always use a good quality cleaner (should have Techron in it) I tried a cheap-o cleaner and the Techron stuff cleaned out additional varnish so it convinced me!
I have an ultrasonic cleaner but this worked even better! When I looked at the white rag it had a large brown stain as well as the junk that was caught in the screen.
If anyone has any questions (other than about my mental state) please ask away..

 

Very interesting, I don't see why that method wouldn't clean the injectors but it doesn't do much for flow matching them or even determining if the flow rate is accurate or consistent. I would also be curious to what your pressure is coming off the line on that setup.

 

You are right about that but it sure beats (if yer on a budget and can't send em out for cleaning) dumping a can of cleaner in the fuel tank! As for the pressure, I never checked it but it pretty low most of the benefits come from the high pressure air after the solvent has loosened everything up. I did this for a friend that was REALLY bucks down and helped him out (read: FREEBEE!!!) and in a case like that it can make a real difference.
The second time I did it, I didn't want to hookup the sidetap and stuff so I hooked a long fuel line to the outlet and and sprayed some cleaner into the hose (a pourable can would be better) I had already hooked up a quick-connect so I could hook up my air line.... I then applied air (to 30 psi) and energized the injector. This was the easiest way to do it but make sure the line is SECURE or you could have a nasty bath of cleaner!! I did this several times until I could see no more varnish n' stuff on the cloth.