Reply With QuoteIt will just flood that cylinder out and possibly wash out the rings. put an old junk plug in its place, plugs are never the same after they have been flooded out.
5-10 Grand Master
If I unplug a coil will I hydro lock that cylinder on fuel?
I want to poll a coil off of a plug, Cyl 1 for instance and hook it up to my other ecu to see if it sparks. I know my engine will not fire on cylinder 1 ( i will leave the spark plug in ) but will it load up with fuel and hydrolock?
Major Contributor
It will just flood that cylinder out and possibly wash out the rings. put an old junk plug in its place, plugs are never the same after they have been flooded out.
Big Time Poster
Like Josh said, for the little bit of atomized fuel squirted in the cylinder with each pulse, you'll wash the cylinder walls down at most. Hydrolock won't be an issue as most of the unburned atomozed fuel will go out the exhaust valve with each cycle.
Big, Big Time Poster
Am I right in thinking that what you're planning is equivalent to having a defective coil on cylinder 1? I've never had a duff coil but I presume the engine just runs lumpy rather than smashing itself?
Big, Big Time Poster
Injectors will not spray enough gas to fill up the combustion chamber before it gets blown out of the exhaust valve on the combustion cycle. So No it should not hydrolock..
however you will have raw fuel going into the exhaust.. if you have a Cat in the car it can damage it.
95 M-sport SOLDnow NSX
5-10 Grand Master
Originally Posted by pingu
It runs retardded - i've had it happen by failure.
5-10 Grand Master
What do you guys think of just pulling the fuel pump relay. I just need to crank the engine to see if I am getting spark.
Big Time Poster
Yeah, don't want to damage your cat. Your car might end up doing this:
Super Moderator
Your m50 has fully sequential fuel injection and it
is capable of adjusting each cylinders fuel needs individually. It monitors the primary ignition circuit so if it see's the coil not firing then it will in theory not open the injector to that cylinder after it sets a code. If it doesn't you won't hydrolock the cylinder or wash out the rings, but you may over load the cat with raw fuel and damage it depending on how long your going to do this.
If you want to run it for a while like this disconnect the injector harness to that cylinder.
Major Contributor
Wouldn't there still be residual pressure on the fuel lines and rail?
It'd still be less messy.
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