one quick injector questions.

[bigbbass451]

Hey, I've been throwing an injector code (16) and I can't really figure out why. My car also runs pretty rough, so today I revved it up pretty good (7k) to see if it would stall out when it came back down. To my suprise when it came back down it ran perfectly smooth. To me it seems like dirty fuel injectors then and maybe revving it up got some of the gunk out of it. I'm going to get some fuel injector cleaner tomorrow, the kind you put in a full tank, and see if that helps at all.

My questions for all you d-series geniuses is, can dirty injectors cause you to throw that code? THANKS!

[guest]

I wouldnt get the shit you put in the tank. it can loosen shit up and cause leaks. well it did on a b6 with a few miles......

I've never thrown a injector code, but haynes has ways to test the injectors. its possible they need to be cleaned, increasing the resistence...

[bigbbass451]

cool, I'll have to check my haynes to see what they say about cleaning em'.

Bump: Anyone know for sure if that could cause you to throw code 16?

[H2Bcivic]

sounds like u need to clean it but it could be a lot of reasons ur throwing that code

[bigbbass451]

hmmm....well today I drove it to work and back thinking that maybe it just needed to be run for a little while since it sat all winter. it doesn't run any better now, but I also didn't get a chance to stop and put some fresh fuel in it either. The car now sounds like it's hitting the rev limiter only at 3.5K which I'm pretty sure means it's in limp mode. What else could cause me to throw that code? Maybe I should just upgrade to some 450's since I know somebody that's got a good set for $40. What do you guys think?

[_CXhatch_]

if your running stock injectors right now dont buy those 450s cuz ur car will run worse than it does now

[shifty35]

if your running stock injectors right now dont buy those 450s cuz ur car will run worse than it does now

He's running Crome, it will be fine.

[gearhead98]

might wanna pull the injectors and check them out. if they gotta lot carbon on them clean'em with some carb cleaner and put them back in. make sure to use new o-rings tho.

don't know if this is relivant but i was throwing a cel (not sure what code didn't get a chance to check it) and then all of a sudden it went out. maybe yours will do the same, still need to check mine tho

[bigbbass451]

Yeah I'm running crome w/ 390's right now. I'm going to check them out today and clean em up. I'll let you guys know how it goes. BUMP for anyone knowing what else could cause code 16.

[bigbbass451]

well, I looked through the haynes manual today to see if I could find anything on injector cleaning and couldn't find a damn thing. I really don't want to have to attempt to drive it around for long enough to go through a tank of gas with injector treatment in it.

Does anyone know how I can clean these injectors without driving it around?

[gearhead98]

pull'em and spray'em with some carb cleaner to get the carbon off, maybe let'em soak in some berryman's b-12 overnight to clean'em really good.

[bigbbass451]

well today I went to town on my injectors. I went through and checked all the wiring with a voltometer. I took the injectors out of the intake manifold, and had my father turn the key over so we could check to make sure that they all sprayed fine. After checking them all one at a time, they all seemed to be spraying just fine.

I decided to run some injector cleaner through the tank with some fresh gas.
It drives just fine except the fuel cuts out if you get full boost in 3rd and pretty much any boost in 4th and 5th. Oh, and it doesn't idle for shit.

I was thinking that if maybe my fuel filter was glogged up that would inhibit flow enough to not idle right and not get enough fuel when it's under heavy draw. That or maybe a new fuel pump is needed.

Would a gloggled filter or bad fuel pump (not enough pressure) cause my ECU to throw code 16 (fuel injectors)??

[solfly]

which injectors/obd are you using

[bigbbass451]

which injectors/obd are you using

390cc DSM's (unknown amount of miles) and OBD1

[bigbbass451]

well sure enough, after driving it last night, I started to throw code 43 (Fuel supply system). Today I picked up a new fuel filter for $12 at autozone and switched them out. Sadly it didn't help at all though. Next is gonna be the fuel pump. My question now is:

If I upgrade to the walbro GSS341 which is 255LPH am I going to have to mess with my tuning at all? I figured since it would increase the pressure I would, but I'm not sure.

What could be causing me to throw that injector code still?

[SLO SOHC]

Most code 43's I've dealt with ended up being an o2 sensor!

Test the parts dont start guessing but if ya do replace the pump upgrade it lol

[Chiovnidca]

Would a gloggled filter or bad fuel pump (not enough pressure) cause my ECU to throw code 16 (fuel injectors)??
Nope, code 16 is an electrical issue.

And a clogged filter or bad fuel pump is going to be most noticeable at higher rpms and loads.

390cc DSM's (unknown amount of miles) and OBD1
Are they high or low impedance? Are you running a resister box?


Most code 43's I've dealt with ended up being an o2 sensor!

Yep usualy an o2, bad vacuum leaks can cause em too. And he is comlaining of an idle problem.


Test the parts dont start guessing but if ya do replace the pump upgrade it lol
Throwing parts at a problem can get expensive cant it?

[bigbbass451]

yes the fuel cuts out at high loads (boost > 3psi or so).

They are low impedence with a resistor box. I went through the wiring with a voltometer and they all read 7.8 ohms resistance to the injectors. I'm thinking my injectors might just be bad.

I actually JUST replaced my o2 sensor, so hopefully that's not the case. I also think a vacuum leak is out of the question since my vacuum/boost gauge reads at about 18 (whatever vacuum's measured in) at idle.

Indeed parts are very very expensive, but I'm not really sure what else to do.

What voltage are the injectors supposed to see? I think they all read at about 13 volts. Is that normal?

Could a bad injector be the cause of code 16?

THANKS for the help everyone, every bit of advice/info is GREATLY appreciated. Hopefully I'll get this mess sorted out pretty quick here.

[bigbbass451]

BUMP for any input.

[bigbbass451]

C'mon. Anyone?

[gearhead98]

code 6 is the engine coolant temperature sensor.

if you got another set of injectors you may wanna swap them out to see if it fixes it.

[Chiovnidca]

What voltage are the injectors supposed to see? I think they all read at about 13 volts. Is that normal?

Could a bad injector be the cause of code 6?

Should have battery voltage at the injectors. So 13 volts is good.

Code 6 would be caused by an out of range signal from the ect sensor. So no, an injector wont cause a code 6.

[bigbbass451]

yeah, I'm definitely half-retarded. I meant code 16 not 6. Sorry about that one guys.

Well now that we've got that straightened out...anyone got any ideas?

[gearhead98]

still should try and swap them out

[d112crzy]

Cleaning injectors is easy.

Stuff you will need to clean injectors:

-some kind of air compressor(may it be an actual air compressor or a manual air pump)
-some hose that fits on the injector as well as your air pumping device
-12v source
-some wiring to connect to your power source
-some kind of cleaner

1. Connect one end of the hose to your injector.

2. fill the hose with any type of cleaner you want. carb cleaner work great.

3. connect the other end of the hose to your air pumping device.

4. connect the wires to your power source

5. force air thru.