injector testing question

[smoking rr]

a while back i bought some 550 injectors from a member on here. let me start off by saying that i am very happy with the deal and the member. the trouble i am having is that the member sent me 6 matching injectors (one with a zip tie around it) and a 7th oddball injector and nothing else in the box. i emailed the member but didnt hear back from him for a few days. not being able to get ahold of him and needing to get my car back together i put the 6 matching injectors in. it seemed to start and idle fine. wbo2 read ok (car hasnt been tuned yet other than the adjustments that are called for when using a maft right out of the box) car didnt drive all that well though, but i just attributed that to need for tuning. a while later the seller replied informing me that the injector with the ziptie on it was a "bad injector" and part of it needed to be transferred to the oddball injector and that one should be used instead.

as i am sure you all can guess by now, i had already cut that ziptie off and i had no clue what cylinder that injector ended up on. well using my HHH programmer i dried turning cylinders off to listen for a difference. it wasn't very constant bc some times turning a certain cylinder off would have a huge effect, other times it would have no effect. i also tried pulling plug wires, but seeing that i am running accell coils that just cause a lot of arcing and LOTS of laughing every time i would get shocked.

so i thought test 3 would be the best. i pulled the injectors and the fuel rail off the lower intake manifold and put a balloon on each injector. i then cranked the car over so that the injectors could fill up the balloons and i wold be able to see which injector wasn't working. i took each balloon fuel of gas and dumped it into its own cup and then put the cups side by side to visually check the difference. i thought for sure i would be able to find the bad injector this time... but... no . all the cups have exactly the same amount of fuel in them.

not the question part. does anyone have another way to test injectors besides having to send them off? i am open to new ideas bc i dont want to put it back together again and still not know if i have a bad injector or not.

[sublime_whatigo]

Lol nice flow test. Use your HHH and test again, listen closely and give the car some rev's while testing. The injector in question may be intermittently bad or have a bad spray pattern.

[smoking rr]

any other thoughts on how to test it before i put it all back together?

BTW. gas eats through red solo cups.

[sublime_whatigo]

You can continuity check them with a meter, should have 2-3 ohms of resistance, don't think this will help you out though.

[smoking rr]

i will give that a try.

[green-lantern]

Sounds like they are flowing fine so if it is bad it must be a spray pattern issue. I would just send them all off. The peace of mind knowing they are working right is worth it.

[smoking rr]

Any suggestions on where to send them? Prices? Turn around time?

Sent from my LG-P999 using Tapatalk 2

[green-lantern]

I sent mine to RC because mine are RC injectors but I think I have heard good things about witch hunter. Shop around a little.

[RealMcCoy]

Do the resistance test as previously stated, if that doesn't get you there, you can get a more consistent RPM drop test by disconnecting the IAC, and turning the idle up slightly. The computer won't be able to adjust for perceived changes in load...

[smoking rr]

ok, i will give that a try in the next few days