I have a code 16 on my 91 Civic Hatchback, 1.5L Dual Point. With an intermittent no start issue. I have some spare injectors laying around so I figured I would just replace both instead of trying to determine which one is bad.

My question is: do I absolutely have to buy new o rings when I change these? Or can I reuse the old ones?
The o ring kit is $11.00 at the parts store.

 

11$? Your gonna skimp out on 11$? Come on man, I'd understand if it was 20-30 or more, but for 11$, spend the money and do it right.

PS: I threw that code for 2 years on my DPFI. Never did **** all to it (even a tuneup) and still got over 500kms/tank.

 

I hear ya! $11.00 isn't much. I have had a few times when the car wouldn't start for a few minutes, so I need to change them so I don't get stranded. I was just going to throw the spares in the tool box just in case, but didn't know if I could just replace them beside the road w/out the o ring kit or not.

 

You can reuse them I've done it before just make sure they aren't rip or cracked if they are then you should replace them...

 

REPLACE THE O-RINGS! - expect them to crumble into dust when you take the injectors out.

 

I guess I'll pull the spare injectors tonight and see what the o rings look like. Seems like a lot to pay for a few rings of rubber! But don't need gas spewing out onto hot manifold either.

 

Ok, I removed an aux. injector from my spare engine. The o rings look fine. I tried removing the main injector, but the screws stripped on my. I have a couple of questions though:

1). can code 16 - fuel injector - also come up if the main relay is bad?

2). Is there any trick to removing the injectors? It came out hard.

3). I assume that since the resistance specs are different for the main injector and the aux. injector that the injectors are actually different and you can put an aux in place of a main?

 

Reading your second post, sounds more like a main relay messing up since it wouldn't start for a few minutes (mine did the same with the same engine). It's still bad, but I don't care, it hasn't stalled while driving so I've been lucky.

Once replaced, clear the ECU and double check that code 16 comes back. That way you don't do any extra work.

Injectors shouldn't be that hard to take out, unless they have been in for 15+ years, then yes, the gasket would of dried up around it. Twist and turn and wiggle and shake that bad boy out.

No clue for the third question.

 

I believe it was the main relay. Here's some info I found regarding Honda's main relays:

"If it's bad on a Civic, you will lose power to the injectors and the fuel pump but you may not lose fuel pressure because the injectors can't open without power. When the main relay goes bad and there isn't any voltage at the injectors, it will set a code 16 for an injector because the computer doesn't read voltage on the groundside of the injector".

I did switch out the main relay with one from my now Honda parts car that is known to work. No problems yet. I did take a third one I have that went bad and added some solder to a couple of points that looked bad and now it works. You don't need to desolder, just add some solder to the areas that look bad.