My VG is coming up on 200k miles now and she's running like a champ except for one fuel injector that likes to act up once in a while. The resistence on the injector is 28 ohms which is a lot more then 12 ohms for a healthy one but from what I've read a bad injector will have a very high resitence.

Anyway, for a while the injector would stop working competly and the car drove like a dog and got me frustrated. I thought I was in for a day of ripping the engine apart and replacing the bad injector. I had a long trip to take and I figured I'd try some fuel injector cleaner. I actually bought a bottle for tanks up to 34 gallons and dumped the whole thing in. For the first 170 miles I was running on 5 cylinders but eventually the 6th cylinder with the bad injector started working again. At first it came and went on a dailey basis. But now, after using about 4 or 5 bottles of the fuel injector cleaner the light stays off 97 percent of the time and the car runs like champ.

What I'm wondering is, what the heck is going on here? Could enough carbon buildup on the injector cause it to stick? If so, would fuel injector cleaner actually remove that buildup? I'm a bit skeptical that using the cleaner has really solved my problem but rather delayed the invetable injector replacement. Or is this all coincidental and it's a wiring thing or something.

I guess what I'm wondering is if anyone else have an experience like this and is 28 ohms really mean the injector is bad and if so, why would the cleaner help it to work?

 

Maybe the joint was messing up because of both problems. Cleaning it probably freed up some of the gunk for you but the resistance issue lets you know there is still a problem.

 

if the resistance is off no amount of Cleaner, which is discouraged by nissan , will fix the problem.

 

why is cleaner discouraged by nissan??

 

corossion...

 

So, what about Chevron Techron then?

 

Dunno, it just says to not use FI cleaner

 

What about all the people here that swear by Seafoam?????

 

Like interautomart said, you should not use injector cleaner since it can strip the solenoid and cause it to fail. Nissan issued a TSB for pintle-less injectors and the use of cleaner. I used injector cleaner with my first set of injectors and had no failure issues, so I guess whatever I was using was not harmful enough. With my new set of injectors I rarely use the stuff, and occasionally use seafoam, but not in the gas, I let the manifold draw it in.

Injector cleaner will not remove the buildup on the injectors filter(first hand experience), but it will help clean valves that have carbon build up.

adamis, the cleaner cannot fix an injector that is electrically out of spec period.(.)

 

Yeah, I'd agree with you on that. However, what I'm trying to figure out is why the cleaner did make a difference in my case. Before I used the cleaner the light was on 90% of the time. Now it's on maybe 1 or 2 percent. I think what I have going is probably two problems or something. The injector is on it's way out and perhaps because it was clogged or dirty it was agravating how bad things were. With a clean injector it now lessons the affect but still because it's bad chooses to go on strike once in a while. It's my hypothisis at the moment.