Can a leaky injector still have proper resistance?

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emiliog2276
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Joined: Fri Feb 01, 2008 1:02 am
Car: 1990 300zx 2+2 NA
2002 Nissan Sentra GXE

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I was wondering if a leaky injector can still ohm within spec. They are all between 11.5 and 12. I know that the cause might be a pinched Oring or the bottom insulators, but can the injector itself be faulty even though the resistance checks out and be the cause of the code 45. Can it be an issue with the fuel rail?


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t.mcginley.jr
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Car: 2002 Nissan Altima SE 3.5
1990 Nissan 300ZX NA 2+0
1966 Ford Mustang
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Usually a bad injector will ohm out of spec when it's bad, but it is possible for one to go bad and still ohm out correctly (although rare). Have you tried doing a power balance test yet? Not sure if you know or not, but pre-1992 injectors are prone to failure.

It's actually REALLY rare that you actually threw a code 45, I've never seen anyone with that code. Usually the ecu isn't able to detect something like that, even though it theoretically should.

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emiliog2276
Posts: 267
Joined: Fri Feb 01, 2008 1:02 am
Car: 1990 300zx 2+2 NA
2002 Nissan Sentra GXE

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t.mcginley.jr wrote:Usually a bad injector will ohm out of spec when it's bad, but it is possible for one to go bad and still ohm out correctly (although rare). Have you tried doing a power balance test yet? Not sure if you know or not, but pre-1992 injectors are prone to failure.

It's actually REALLY rare that you actually threw a code 45, I've never seen anyone with that code. Usually the ecu isn't able to detect something like that, even though it theoretically should.
Code 45 comes and goes. Although the car is a 1990 it has a 1993 engine with the newer type of injectors present.

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t.mcginley.jr
Posts: 1547
Joined: Fri Jun 01, 2012 5:50 am
Car: 2002 Nissan Altima SE 3.5
1990 Nissan 300ZX NA 2+0
1966 Ford Mustang
Location: New Jersey, USA

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emiliog2276 wrote:
t.mcginley.jr wrote:Usually a bad injector will ohm out of spec when it's bad, but it is possible for one to go bad and still ohm out correctly (although rare). Have you tried doing a power balance test yet? Not sure if you know or not, but pre-1992 injectors are prone to failure.

It's actually REALLY rare that you actually threw a code 45, I've never seen anyone with that code. Usually the ecu isn't able to detect something like that, even though it theoretically should.
Code 45 comes and goes. Although the car is a 1990 it has a 1993 engine with the newer type of injectors present.
That's even more strange... with the engine running do you smell fuel at all? Like if you smell around the intake where the fuel rail is? Did you put new fuel rail insulators in?

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emiliog2276
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Joined: Fri Feb 01, 2008 1:02 am
Car: 1990 300zx 2+2 NA
2002 Nissan Sentra GXE

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No fuel smell. Ive replaced all the orings, bottom and top insulators, the fuel rail grommets, new screws for the caps, new connectors for all injectors.


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