Fuel boiling?
Thread Starter
|
Freshman User
Joined: Apr 2005
Posts: 27
Likes: 0
Fuel boiling?
Ok, I posted in another topic about possibly having a fuel pump that is not delivering enough fuel to a 351M with new edelbrock intake and carb, of the performer series. It has been found that the pump is the problem, and fails to deliver the necessary amount of fuel to the engine when you step on the gas, and especially when the secondaries open.
I noticed another issue today when the engine was idling for about 15 minutes or so and I shut it off. I heard two seperate gurgling sounds. The first was coming from the radiator and the overflow, boiling over apparently. The second was coming fromt eh fuel line, and I noticed the fuel was bubbling in the line/filter. The pump seems to be causing a very lean mixture in the engine. I know a lean mixture creates a lot more heat. Can this lean mixture cause the engine to start to overheat and boil the coolant/fuel???
NOTE: New radiator installed 2 weeks ago, water pump is operational, as is the thermostat. Timing is set to 8 degrees BTDC.
I noticed another issue today when the engine was idling for about 15 minutes or so and I shut it off. I heard two seperate gurgling sounds. The first was coming from the radiator and the overflow, boiling over apparently. The second was coming fromt eh fuel line, and I noticed the fuel was bubbling in the line/filter. The pump seems to be causing a very lean mixture in the engine. I know a lean mixture creates a lot more heat. Can this lean mixture cause the engine to start to overheat and boil the coolant/fuel???
NOTE: New radiator installed 2 weeks ago, water pump is operational, as is the thermostat. Timing is set to 8 degrees BTDC.
Laughing Gas
Joined: Jul 1999
Posts: 1,048
Likes: 22
From: Lacey, WA
Hi,
Here are a few things to check.
Pull a spark plug and see if it is dry and white, a result of being lean.
Also verify that the float level is correct in the carb.
Do the exhaust manifolds glow orange. May have to check this at night.
Lee
Here are a few things to check.
Pull a spark plug and see if it is dry and white, a result of being lean.
Also verify that the float level is correct in the carb.
Do the exhaust manifolds glow orange. May have to check this at night.
Lee
Moderator
Joined: Dec 2001
Posts: 22,436
Likes: 17
From: Louisville,Ky.
Yes it can raise the cylinder temps enough to overheat the engine.
Check for vacuum leaks along the intake to head areas and carb to manifold areas. Make sure that all unused vacuum ports are plugged.
Also check for a possible blown head gasket it all else checks out.
Check for vacuum leaks along the intake to head areas and carb to manifold areas. Make sure that all unused vacuum ports are plugged.
Also check for a possible blown head gasket it all else checks out.
