Preventing ignition

[sfkjeld]

Thanks, but it sounds messy. Is there a fuse in the ignition circuit?

[blue62]

Originally Posted by sfkjeld

Thanks, but it sounds messy. Is there a fuse in the ignition circuit?

There is a "presta" valve on the fuel rail, It's like a valve on your tires.
push it with a screw driver while holding a rag over it.... done.
JFP gave you sound advice..... if you crank the engine over without disabling the fuel system and relieving the fuel pressure your going to be putting raw fuel into the engine....... washing the oil off the cylinders and bearings...... Not good for the engine.......
Then pumping raw fuel into the exhaust and possibly damaging the catalytic converters.
If you want to know the location or type of specific fuses or relays they are listed in the Bentley book.
I believe fuel injectors and ignition are the same fuse.

[sfkjeld]

Wait, so there is a fuse that supports both ignition and fuel injectors? If so, why not just remove that fuse?

[blue62]

Originally Posted by sfkjeld

Wait, so there is a fuse that supports both ignition and fuel injectors? If so, why not just remove that fuse?

well I have no idea what it is your trying to do so I couldn't say.

[JFP in PA]

Originally Posted by sfkjeld

Wait, so there is a fuse that supports both ignition and fuel injectors? If so, why not just remove that fuse?

Because if you just remove the fuse, you will be still pumping gas into the engine while it is turning over, which is not a good idea; if you disable the fuel system and vent off the residual pressure, you will prevent gas washing over the cylinder walls and into the oil sump, which is a primary cause of bore scoring.

[blue62]

Originally Posted by JFP in PA

Because if you just remove the fuse, you will be still pumping gas into the engine while it is turning over, which is not a good idea; if you disable the fuel system and vent off the residual pressure, you will prevent gas washing over the cylinder walls and into the oil sump, which is a primary cause of bore scoring.

I tried to get that through to him I guess he didn't get it.

[JFP in PA]

Originally Posted by blue62

I tried to get that through to him I guess he didn't get it.

Sometimes, people only hear what they want to hear. It's his car and his money, so he is free to do whatever he pleases, but I often wish people would learn to think like doctors when working on these cars: First, do no harm..........

[blue62]

Originally Posted by JFP in PA

Sometimes, people only hear what they want to hear. It's his car and his money, so he is free to do whatever he pleases, but I often wish people would learn to think like doctors when working on these cars: First, do no harm..........

Spot on......

[piper6909]

Originally Posted by JFP in PA

Sometimes, people only hear what they want to hear. It's his car and his money, so he is free to do whatever he pleases, but I often wish people would learn to think like doctors when working on these cars: First, do no harm..........

Being an impartial observer, I don't exactly think that's the case here. SFK was inquiring about the fuse that fed both the ignition AND the fuel injectors. It doesn't necessarily mean he didn't understand or listen to what Blue said about fuel in the cylinders.

Now here's MY take, and please tell me if I'm wrong:
1) The car was sitting all winter, so I seriously doubt there's any significant fuel pressure in the system anyway. Just pulling the fuel pump fuse or relay should suffice.

2) Even if there IS fuel pressure, and here's where SFK's question comes into play, if the fuse that powers the injectors is pulled, then the injectors can't pulse and inject fuel into the cylinders anyway. Correct?