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Topic: Leaking Fuel Injectors (Read 3126 times) previous topic - next topic

Leaking Fuel Injectors

Reply #30 –
Theory number 2 on why the #1 plug stays dry.
The engine always stops with the #1 intake valve open. So the gas doesn't pool-up on top of the #1 valve. It runs into the cylinder and leaks past the rings into the pan.

Leaking Fuel Injectors

Reply #31 –
Quote from: softtouch;392848
Theory number 2 on why the #1 plug stays dry.
The engine always stops with the #1 intake valve open. So the gas doesn't pool-up on top of the #1 valve. It runs into the cylinder and leaks past the rings into the pan.

With all due respect this is the SILLIEST THING I HAVE EVER HEARD!!! Normally an engine usually stops in 4 different spots.(depending on the number of cylinders to some extent) And testing has proved this time after time. So if your ridiculous theory is correct swapping the injectors will prove that. I have replaced numerous flywheels in my life with gear issues and upon inspection their is normally 4 distinct areas of wear. Saying the engine stops at the same place every time is beyond BELIEF. Do you really believe this !!!

Just curious why does an engine when shut down stop at the exact place every time. This i have to hear!!!

HUMOR ME!!!
I spend money I don't have, To build  cars I don't need, To impress people I don't know

HAVE YOU DRIVEN A FORD LATELY!!

Leaking Fuel Injectors

Reply #32 –
man if that were ture, it would be so helpful in troubleshooting and setting timing marks on the dizzy to base.
I know one of the fins on the dizzy is narrower than all the rest so the PIP can ID cyl 1 but ive never had the luxury of my engine showing me it stopping at the same rotating point each time,, never had it happen, cant speak to the 2.3L though.  My  gut says the ford shop manual says it does though, i have all the manuals and would also be interested.

Leaking Fuel Injectors

Reply #33 –
Quote from: TOM Renzo;392860
With all due respect this is the SILLIEST THING I HAVE EVER HEARD!!! Normally an engine usually stops in 4 different spots.(depending on the number of cylinders to some extent) And testing has proved this time after time. So if your ridiculous theory is correct swapping the injectors will prove that. I have replaced numerous flywheels in my life with gear issues and upon inspection their is normally 4 distinct areas of wear. Saying the engine stops at the same place every time is beyond BELIEF. Do you really believe this !!!

Just curious why does an engine when shut down stop at the exact place every time. This i have to hear!!!

HUMOR ME!!!
Lets say only one cylinder has good compression. This may increase the odds it will stop when this cylinder is on the compression stroke.
Hey I agree he should swap a suspected bad injector into #1 to see if it leaks there.
Just trying to think of other stuff incase it doesn't.
Don't really know how many times he has found the #1 plug dry.

I am curoius about something, maybe you know the answer. Why does the the fuel rail still have pressure after the pump stops? Is the spring loaded diaphram in the regulator applying pressure? Also, the pressure bleeds off after some time. Does the gas leak out somewhere? If so where?

Leaking Fuel Injectors

Reply #34 –
The pump has a check valve and naturally the injectors are closed if they are not gummed up and leaking. The pressure regulator also blocks the pressure in so the system keeps line pressure with the engine off. This accomplishes 2 things It keeps cranking time down and also prevents VAPOR LOCK. Turbo cars have a different regulator. They increase boost one for one with positive boost. Another words for every pound of boost the regulator increases rail pressure by the same amount. Normally over the 42.5 line pressure under O vacuum to the regulators diaphragm. Then increases proportionally by your boost pressure.
I spend money I don't have, To build  cars I don't need, To impress people I don't know

HAVE YOU DRIVEN A FORD LATELY!!

Leaking Fuel Injectors

Reply #35 –
Quote from: TOM Renzo;392970
The pump has a check valve and naturally the injectors are closed if they are not gummed up and leaking. The pressure regulator also blocks the pressure in so the system keeps line pressure with the engine off.
I understand how this keeps the gas trapped. But liquids like gas can't be compressed like air so I still don't understand where the pressure comes from.
 

Leaking Fuel Injectors

Reply #36 –
The gas being compressed. It builds pressure. just like a brake system. It cant be compressed so it builds pressure in the system.
I spend money I don't have, To build  cars I don't need, To impress people I don't know

HAVE YOU DRIVEN A FORD LATELY!!