| Author | Message | ||
     Kalali |
My front cylinder is running too rich (soot on the plug). What is the best way to check and see if the injector o-ring is leaking? Can the same test method, i.e., propane, brake cleaner, etc., used for the intake seals be used for the o-ring? I can actually see the front injector pulse width is wider than the rear using the ECMspy; it is staying open longer. Thanks. P.S. The fuel map appears to be OK and the front intake seal passed the spray test. (Message edited by kalali on October 23, 2009) | ||
| Oldog |
Front running rich, the injector its self is leaking, I believe several power up sequences in succession are supposed to show up a leaker, you should find liquid fuel in the manifold, an air leak generaly results in lean readings, and high idle | ||
| Kalali |
Sloppy, thanks. My brain wires were reversed...An air leak SHOULD indeed result in a lean condition. I was playing with the ECMspy last night and had the bike in the On/off position (priming the fuel pump each time)a bunch of times. At the end I did fire it up but only let it run or a few minutes. But then again that should have affected both cylinders and the rear plug looks just fine. Looking at the injector pulse width info on the Runtime page did show a slightly larger value for the front injector. Could the injector leak while the motor is running or it will only weep after engine is shut down? Also, could you kindly elaborate a little as what you mean by power up sequence and where in the manifold should I look for excessive gas? Thanks for your help. | ||
| Preybird1 |
I would just change the o-rings there cheap and not hard to install. I used standard injector o-rings the orange ones from any part store. Now if you do the o-ring swap throw away the stupid screw that holds the fuel rail assm on and get an allen machine bolt/screw. I had to ruin a fuel rail once to get it off due to a seized screw! There is no way to get a tool in there to get that screw out if it strips or seizes. | ||
| Oldog |
+2 on the #@$@%$%@#5 screw, hey russ, what do you ask for at the parts house, for that o-ring, I would like to get a tighter fitting manifold end the stockers are loose, I am seeing an intermitting leak, (from new harley parts) =( the main manifold is easier to install with out the fuel rail in the way. | ||
| Oldog |
kali I have not run that test but looking at the manifold layout, it would seem that a carefuly guieded swab or rag into the suspect injectors branch should find the fuel. power up sequence, what happens with the key and the kill switch first go on prior to start up. | ||
| Kalali |
I am going to ride the bike for a little while, may be a tankful and recheck the plugs. If I see the soot built up again on the front plug then I will take the next steps. I have a brand new intake manifold assembly with the injectors and the intake seals/flange which I will probably put in. It may also be a good time to attack the front ISO project while I have the tank off the bike. Winter project. | ||
| Preybird1 |
Oldog I just ordered a standard kit o-ring pack for fuel injectors specifically and it had all sorts of types and ranges of size, I did notice the new o-rings were a lot harder than the worn stock ones were. Also they fit much tighter....But they installed fine with a little lube. Oh make sure your hands are super clean when messing with the injectors or installing them. The injector nozzles have tiny hole's that can get clogged if touched with dirty or greasy hands. under no circumstance should the injector get dropped! | ||
| Oldog |
under no circumstance should the injector get dropped! Is this a DAMHIK type thing, I never considered it but you make a good point about not touching the nose end, the injectors are amazing things, Rus Whos? standard pack ( as in standard tools?) sorry if it seems pissy I have basicaly 2 choices here for auto parts, advanced and autozone and I gotta be specific... I think that my intermittent air leak is possibly an injector oring, that and I bet that the rings are not 10$ each either... } | ||
| Preybird1 |
I bought them from a store called hendersons tire and wheel, I think autozone would carry them also. I would call them up and see if they can bring some in for you to look at and decide from there. |
