Why would one cylinder on my 2000 V-10 fill up with raw fuel when injector is unplugged from harness? New injector and still fills with fuel!
I can't understand why only one cylinder.
All help and suggestions are greatly appreciated.

 

Can anyone tell me why my 2000 V-10 would fill one cylinder with raw fuel,even with injector unplugged from harness? New injector still same problem. I can't understand why just one cylinder.
All help and or suggestions are greatly appreciated.

 

Have you checked your fuel pressure? Might be forcing it open if it's the first injector in line.

 

And how do you know just one cylinder is full of fuel?

 

i pulled all plugs and started to run compression test and cylinder #9 was fouled and,would just shoot a stream of gas out of plug socket up to firewall.
i then disconnected all injectors on that side and spun motor over to help clear out gas.
compression was 130# on all cylinders of that side of motor,new injector and spun motor over and gas again shot from same cylinder, and I had not even plugged in a single injector yet.

 

fuel pressure was 40# while cranking, 30# idle, and 20# @ 2500rpm,after i installed new pressure regulator last week

 

if that was the case, the motor would have been hydrolocked and blown.

 

it wasn't locked up ,but it did try too while cranking,just let it sit a few seconds and it turned over,it practicly had raw gas coming out of exhaust, 1/2 ring around outside of tailpipe wet with fuel.

 

20 lbs at 2500rpm is too low. I'm seeing 38 lbs at 2500rpm with a slight increase to 40 lbs if I get on it.

 

I thought that was a low pressure,but can't figure out how or why it would effect or cause flooding of one cylinder

 

Sounds like it could just be a leaky injector (even new parts can fail). It would explain the pressure drop and why it is flooding one cylinder, even when the injector is unplugged. You could swap the injector from the cylinder that is flooding with another and see what happens.

 

I will try the injector swap and see how it goes,but that is what i thought when i first found it and, therefore got the new injector.but again i will relocate it to an easier cylinder to access,lol
thanks

 

only other thing i can think of to check is the fuel pressure regulator, possibly leaking fuel into the vacuum line and into cyl # 9 that way or you didn't get all the fuel out from the first injector swap

 

Moved to the V10 forum.

 

That's a GREAT POINT!