Fuel pissing cyl 6 ( MAS V8 ) - Defender Source
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  #1  
Old June 14th, 2011, 01:35 PM
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Fuel pissing cyl 6 ( MAS V8 )

Has anyone had a similar problem?

My NAS90 is pissing fuel uncontrollably from Cylinder 6

So Far I have put a new injector, swapped ECU and nothing

Doesn't do it all the time, but when it does, I can start it in the garage for 30 seconds and I have a 1.5ft puddle of fuel.

Mechanically it has 138 on each cylinder, no sticking valves,

Any suggestions ( other than lighting it up *LOL* )
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  #2  
Old June 14th, 2011, 01:41 PM
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what about the electrical harness for the injector. Maybe is has a short in it?
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Old June 14th, 2011, 02:04 PM
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Quote:
Originally Posted by jetmech View Post
what about the electrical harness for the injector. Maybe is has a short in it?

Connector on the injector (or harness) is shorting. IIRC, the injector fires when GROUNDED.

Call Eric at AB and get the little test light that fits on the injector plug and start looking for shorts.
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Old June 14th, 2011, 02:46 PM
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Thanks,

That is what most educated people suggested, I just can't believe what a f-ing nightmare will be to find the shorting when I have less than zero abilities related to electric
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Old June 14th, 2011, 03:42 PM
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Thanks,

That is what most educated people suggested, I just can't believe what a f-ing nightmare will be to find the shorting when I have less than zero abilities related to electric
Most of the time it is pretty obvious ie chafed wire or corroded connector or the injector itself is bad. Do you have a spare injector to swap in? If not, you can swap two and see if the problem moves.
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Old June 14th, 2011, 05:21 PM
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I did put a new injector, so I guess now is time to look at the stupid connector/wire more in detail
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Old June 14th, 2011, 07:04 PM
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It actually sounds like the o-ring is not seated correctly....if it's pissing onto the ground. Did you lube the o-rings when you replaced the injector? Did you take the entire fuel rail off when doing this or just pry it up enough to get the new injector in?
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Old June 15th, 2011, 01:09 AM
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I will check that

I took the whole rail off
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Old June 15th, 2011, 06:58 AM
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even if the injector is open all the time it wouldn't leak if the "O"ring is sealing correctly
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Old June 15th, 2011, 11:55 AM
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even if the injector is open all the time it wouldn't leak if the "O"ring is sealing correctly
I read this as leaking into the cylinder.
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Old June 15th, 2011, 12:07 PM
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Maybe I did not represent the problem correctly.

Originally my problem started as follows

Spark plug was loose ( yeah I know forgot to tighten it ), and fuel was going into the engine, so tighten the plug, changed the oil and realized the injector was getting stuck pissing fuel into the engine, that was what caused me to replace the injector .

After I replaced the injector, drove fine for couple of days, sat in the garage for a week, drove it on the weekend to change the shocks, and on the way back home it acted like too much fuel was going into the engine when at iddle ( rpm dropped and raised )

This was at 2 am, so I left there and went to bed

The following day, I've started it and fuel was pissing all over the floor I can see it seating in the little bucket below the fuel rail. It leaks outside the engine ( below the rail where the injector is ).
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Old June 15th, 2011, 10:07 PM
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My money is on the old o-ring still in the fuel rail under the new injector (with new o-ring)
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Old June 16th, 2011, 01:45 PM
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Always remember to have all your toys accounted for when you're done playing(o-rings,nuts,bolts,old gaskets,sockets).
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