legacycentral bbs

I seem to have an issue with cylinder 1 flooding.
I noticed a leak from the injector seal, so I swapped it out for a new one and I still have the damn leak. I can drive the car for maybe 20-30 minutes until it floods and won't start for a while. Throttle is normal, even at WOT it's normal.

Do I just have a bad injector?
Or fuel pressure regulator?

I tried to search but I haven't found a thing.

Stock fuel system besides a 255 in the tank.


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Did you try swapping an injector from a cylinder that is not leaking to the one that is leaking to confirm whether it's the injector, the rail, or possibly that the injector is not seating properly.

Are you positive you have the correct fuel injector to fit the rail?

Legacy777 wrote:Did you try swapping an injector from a cylinder that is not leaking to the one that is leaking to confirm whether it's the injector, the rail, or possibly that the injector is not seating properly.

Are you positive you have the correct fuel injector to fit the rail?

I did not swap them, I never touched them until it started leaking. Stock fuel system.
I will swap them tomorrow!

I didn't drive the car since November, but it sat in my garage. Assumed the injector seal dry rotted, replaced but still leaky.


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Could be the ECU sending a bad signal to that injector forcing it to open full duty cycle? Or a shorted wire causing the same thing? Would it flood with KOEO? key on engine off.

I just had this problem in an Xterra where the ECU shorted and anytime the key was on the injector was pumping fuel. Just an idea.

It could be the ECU, but unlikely. I've never seen one go bad, and that's even with my 40 year old VW bus ECU. The injector itself might be shorted (closed circuit), or the resistance of the injector has dropped enough to add just enough more flow to flood out the cylinder while driving. I would take a Ohm meter and check all the injectors. They should have a resistance of around 14ish +/- a few .1's. I would measure them cold and, then hot. If they check out, measure the wire resistance to the ECU. Also, doing what Josh said will help narrow down the problem. If you swap the location of the injector, and the problem is still occurring with cylinder 1 I would then look into the wiring/ECU.


The only way for the engine to flood while the key is off is if you have a stuck open injector. The fuel system stays pressurized while the ignition is off (has a check valve) this allows faster starts. The pressure could bleed off through a open injector pushing fuel into the cylinder.