Fuel Injector Seepage
#1
Fuel Injector Seepage
Trying to track down a slight and occasional gas smell and I noticed one injector port looking different than the others. In the pic below you'll see the right one (Cyl 4) is discolored with a oily dirty like residue. The left one (Cyl 2) is clean and is like the remaining ports. However, while the car is running even with the throttle open a bit, I can't see any seepage occurring. I wonder if the injector is not seated properly or there is a slight kink or tear in an O-ring. I replaced the injectors about a year ago and lubed the O-rings with vaseline prior to use, but there may still be something wrong. The paranoid me wants to take the intake manifold off and inspect the injector and replace the O-rings, but the more pragmatic me says it's not much of a leak, if any, and I shouldn't worry about it.
#3
Trying to track down a slight and occasional gas smell and I noticed one injector port looking different than the others. In the pic below you'll see the right one (Cyl 4) is discolored with a oily dirty like residue. The left one (Cyl 2) is clean and is like the remaining ports. However, while the car is running even with the throttle open a bit, I can't see any seepage occurring. I wonder if the injector is not seated properly or there is a slight kink or tear in an O-ring. I replaced the injectors about a year ago and lubed the O-rings with vaseline prior to use, but there may still be something wrong. The paranoid me wants to take the intake manifold off and inspect the injector and replace the O-rings, but the more pragmatic me says it's not much of a leak, if any, and I shouldn't worry about it.
#5
She runs fine. Come to think of it I haven't noticed a gas smell since adjusted the timing earlier this week—it was advanced to about 27, probably running rich. I just never made that possible connection until now.
#7
Clean and dry it with brake cleaner and pour a little bit of talc power around the suspected area. Turn ignition to on with engine off. Observe for a couple minutes. This will check if it's the connection between the fuel rail and injector is the one leaking because fuel pressure is always present behind the injector with ignition on. Nothing? Run the engine and observe. This one checks for the lower O-ring for proper sealing.
Thread
Thread Starter
Forum
Replies
Last Post
jmlee44
4th Generation Maxima (1995-1999)
8
10-02-2022 02:13 PM
My Coffee
New Member Introductions
15
06-06-2017 02:01 PM
Forge277
1st & 2nd Generation Maxima (1981-1984 and 1985-1988)
12
06-13-2016 09:26 PM