fuel injector help

[jeremyuhh]

i have a 93 stock ka24de and my #1 cylinder stopped firing out of now where.

i pulled each spark plug cap, and when i pulled #1 there was no change, and when i pulled #2, #3, and #4, the car started to die.

i pulled out the spark plugs, and plug #1 looked okay, everything intact, but the tip was slightly burnt, compared to the others, which were clean and had no residue.

so i checked to see if #1 spark plug wire was sparking, i grounded it, and spark came out.

did a ohm check on all my injectors, and this is what i read:
#1: 0Ω / #2: 11Ω / #3: 49Ω / #4: 11Ω

i also noticed that injectors #2 and #4 has a blue dot. im guessing they were rebuilt or replaced.

my questions are:

1) should i replace the #1 injector only or replace all four?
2) would it be easier to get all flow checked and cleaned?
3) and is it common for just one injector to go bad?
4) could it also be bad wiring?

any help is appreciated.

[KFLS14]

replace 2, 1 is dead and 3 sticking open dumping too much fuel
resistance should be between 10-14ohms @77F per fsm
1 1/3
2 depends on cost 1 probably needs to rebuild, 3 cleaned. It's a stock injector should be able to find a few spares,most people swap to bigger injectors. I sold 8 spares I had lying around for 10bucks. Post in WTB section should be able to find some locally.
3 yep they're old, know a few guys with injector crapping out
4 nope ur measuring injector directly

[nismoracingsx]

happened to me a few times before, any time I have a dead cylinder, i almost always check the fuel injectors first. one is usually crapping out on me :P

btw, does anyone else think the KA sounds like a boxer engine when one cylinder is down?

[jeremyuhh]

thanks guys. i already found some locally for $15, gonna pick that up right now.

and yea it does sound like a boxer engine. haha

[leung]

btw, does anyone else think the KA sounds like a boxer engine when one cylinder is down?

HAHA definitely. Thought the same too.

[jeremyuhh]

Ok so I replaced injector #1 And #3 and now have all injectors at 11 ohms. Started the car, worked fine. All cylinders firing

I then drive about 30 miles. Left the car for about 2 hours. Went to start it. And it took a while to turn over. After about 20 seconds car started and cylinder #1 stopped working. I pulled spark plug cap #1, no change in engine. Grounded it and it showed sparks.

Basically the injector died again. Haven't had a chance to test the ohms yet. But I'm guessing it's an electrical problem now ? Something to do with wiring or voltage to the first injector?