clogged/dirty injectors UPDATE

[SleepinGVR4]

What would cause my injectors to get dirty/ clogged? This is the second time its happened. They probably only have 20K miles on them. And I got them new from Jeff O. when I bought one of his eprom chips. Its not like I don't have a fuel filter. (Its a fuel lab filter with a 10 micron paper filter, which is actually new too.) I just had them cleaned by FIC a couple of months ago. And they are dirty again. I actually just replaced the fuel filter about 2 month ago to be on the safe side. Didn't help and it wasn't dirty to begin with.

The only thing I can think of is that the chassis did sit for a while before I rebuilt the car and the factory fuel lines could of had dirt get in them. My next step is to replace the factory line with some type of braided fuel line from the tank to the fuel filter.

 

[stevep]

Gas or e85?

 

[SleepinGVR4]

gas

 

[belize1334]

Did the injectors sit for any extended period of time? It could be varnishing.

 

[SleepinGVR4]

No, they were installed as soon as I got them both times.

 

[stevep]

What are you finding in them? How are they clogged?

 

[SleepinGVR4]

I don't know what it was. FIC just said they had dirt or something in the tiny screens in the injectors themselves.

 

[G]

Your hard lines could be corroding on the inside from sitting so long. Have you checked the strainer at the pump?

 

[SleepinGVR4]

G, thats the only thing I can think of. I just don't know how anything is getting past the fuel filter though. And by stainer you mean the fuel pump sock? If so I just replaced it with a new one two months ago.

 

[belize1334]

You could put a plastic fuel filter on the return line (after the fpr) and see if it gets dirty...

 

[SouthCaliVR4]

On mine corrosion in the fuel rail itself was what had clogged up my injectors, Have you pulled the rail & taken a look through it? Maybe check the line from filter to rail & see if it's correded inside?

 

[SleepinGVR4]

Just got off the phone with FIC. They said my injectors were dirty again but not enough to effect the way my car has been acting.

I just checked my fuel filter and that is fine.

I think I may have narrowed down the problem to a partial clog in either the feed fuel line or the return. My fuel pump power wire is still getting hot because I think the fuel pump is working to hard. click I just wish I knew which line it was. My fuel pump is also loud sometimes and quiet other times. Its usually loud when I start it and after i drive it some, its almost to the point where you can't hear it anymore. Also it might explain why it seems my fuel pressure fluctuates sometimes.

It might also explain why I've had my rubber fuel line between the pump and the sending unit burst, twice. click

I think when I have my injectors cleaned and flowing nicely it hides the fact that there is a partial clog until the injectors get dirty enough not to hide the clog anymore. Make sense? /ubbthreads/images/graemlins/dunno.gif

The reason I never thought my fuel line was clogged is because my car always starts and never dies.

I tried to find a electricians fishing wire I could snake down both fuel lines but I couldn't find anything that would work.

Does this make since to anyone or am I to tired to make sense?

 

[G]

You could run a test fuel line from the pump all the way to the rail and see if it runs the same.

 

[SleepinGVR4]

I'm probably just going to replace it anyway. I'm going to get under my car today and see if the lines are bent or kinked anywhere.

 

[SleepinGVR4]

No one has any ideas or comments?