Jump to content
  • Welcome to SAU Community

    Welcome to SAU Community, like most online communities you must register to view or post in our community, but don't worry this is a simple free process that requires minimal information for you to signup. Be apart of SAU Community by signing in or creating an account.

    • Start new topics and reply to others
    • Subscribe to topics and forums to get email updates
    • Get your own profile page, build reputation and make new friends
    • Send personal messages to other members.
    • See fewer ads!

    Consider joining our newsletter for the latest content updates

    Click here to register


Recommended Posts

Hey all, so I can't find a guide on it but when you turn on the key to the "on" position (the one where all the electronics turn on, but not cranking the actual car) do the spark plugs fire up? or is it only when  you actually crank the car the spark plugs fire? Also will the car turn to the "on" position with the coilpacks disconnected? 

Share this post


Link to post
Share on other sites

The spark pkugs never just fire up, they are fired by the engine at the correct time in relation to crankshaft position. They don't just turn on.

 

Yes the car will turn to the on position with coil packs disconnected, there's no interlock in any of that stuff

Share this post


Link to post
Share on other sites
7 minutes ago, Ben C34 said:

The spark pkugs never just fire up, they are fired by the engine at the correct time in relation to crankshaft position. They don't just turn on.

 

Yes the car will turn to the on position with coil packs disconnected, there's no interlock in any of that stuff

I would assume the crankshaft doesnt rotate until the car is on? thanks for the speedy response man. One other thing if i may ask can fuel injector spray out fuel without the return line hooked up?

Share this post


Link to post
Share on other sites
15 minutes ago, silviaz said:

I would assume the crankshaft doesnt rotate until the car is on? thanks for the speedy response man. One other thing if i may ask can fuel injector spray out fuel without the return line hooked up?

Depends what you mean by that. The fuel goes through the rail, then to the reg then to return. If reg is there yes fuel will spray out of injectors, and out of return line

Share this post


Link to post
Share on other sites

If you want the ECU to think the engine is turning when it isn't (eg to see if an injector clicks open and closed or a spark plug fires), remove the crank angle sensor (but leave it plugged in to the loom) turn the key to ON and turn the rear spindle of the crank angle sensor. ECU sees some RPM (probably pretty low) and does it's thing

Share this post


Link to post
Share on other sites
Just now, Ben C34 said:

Depends what you mean by that. The fuel goes through the rail, then to the reg then to return. If reg is there yes fuel will spray out of injectors, and out of return line

ok thanks appreciate it.

Share this post


Link to post
Share on other sites
Just now, Duncan said:

If you want the ECU to think the engine is turning when it isn't (eg to see if an injector clicks open and closed or a spark plug fires), remove the crank angle sensor (but leave it plugged in to the loom) turn the key to ON and turn the rear spindle of the crank angle sensor. ECU sees some RPM (probably pretty low) and does it's thing

Ah ok thanks, I just wanted to make sure when u put the key on the "on" positon, (before the cranking to turn the car on) that the spark plug doesnt actually fire up

Share this post


Link to post
Share on other sites
2 hours ago, Ben C34 said:

The spark pkugs never just fire up, they are fired by the engine at the correct time in relation to crankshaft position. They don't just turn on.

 

Yes the car will turn to the on position with coil packs disconnected, there's no interlock in any of that stuff

Oh man sorry to bother but one very last thing a while back i lost my fuel rail spacer and used a metal washer, can this cause injector leaks?

Share this post


Link to post
Share on other sites
20 minutes ago, silviaz said:

Oh man sorry to bother but one very last thing a while back i lost my fuel rail spacer and used a metal washer, can this cause injector leaks?

If the washer is the correct thickness that is fine.

Share this post


Link to post
Share on other sites
Just now, Ben C34 said:

If the washer is the correct thickness that is fine.

ok thanks so much man.

Share this post


Link to post
Share on other sites
On 5/18/2020 at 7:00 PM, Ben C34 said:

The spark pkugs never just fire up, they are fired by the engine at the correct time in relation to crankshaft position. They don't just turn on.

 

Yes the car will turn to the on position with coil packs disconnected, there's no interlock in any of that stuff

Hey Ben, I was hoping to get your opinion on aftermarket fuel injector o-rings, do you think it's a bad idea?

Share this post


Link to post
Share on other sites
8 hours ago, silviaz said:

Hey Ben, I was hoping to get your opinion on aftermarket fuel injector o-rings, do you think it's a bad idea?

So long as they are for fuel injectors and the correct size any are fine

No way would I use genuine orings. They are a ripofff

Share this post


Link to post
Share on other sites
On 5/23/2020 at 8:12 AM, Ben C34 said:

So long as they are for fuel injectors and the correct size any are fine

No way would I use genuine orings. They are a ripofff

Ok thanks, I had a leaky fuel injector according to a mechanic he sprayed it with water and we saw steam or something. I pulled out the injector and the seal looks in great condition, so thinking is it even the injector?

Share this post


Link to post
Share on other sites
1 hour ago, silviaz said:

a leaky fuel injector according to a mechanic he sprayed it with water and we saw steam or something

That doent make sense.

Share this post


Link to post
Share on other sites
Just now, Ben C34 said:

That doent make sense.

So basically, I wanted to find out what my rough idle was  once the car was warmed up and he said it sounded like an air leak, he then proceeded to pour some water over the injector area. and when he got to the last injector he saw it was smoking after pouring the water and said the o ring inside needs to be replaced. I did get the injector out but the o-ring looks like brand new.

Share this post


Link to post
Share on other sites

Still doesn’t make sense! 

Share this post


Link to post
Share on other sites
On 5/24/2020 at 1:15 PM, silviaz said:

he saw it was smoking after pouring the water

Is it a Lucas injector?

  • Haha 1

Share this post


Link to post
Share on other sites
On 5/25/2020 at 3:29 PM, Ben C34 said:

Still doesn’t make sense! 

Tell me exactly what doesnt make sense i tried to be as specific as possible. I think i have a bad injector. mechanic said fuel was leaking past the piston ring

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



×
×
  • Create New...