Fogging question...
#1
Registered
Thread Starter
Fogging question...
1995 502 MAG EFI
After running antifreeze thru the cooling system, I pull the coil wire off and spray fogging fluid into the throttle body.
When I do that, I slide the throttle lever forward to open the blades and then spray fluid into the housing as I crank the starter to turn the engine over.
Question is , is the engine adding fuel to the fixture when of I do this
After running antifreeze thru the cooling system, I pull the coil wire off and spray fogging fluid into the throttle body.
When I do that, I slide the throttle lever forward to open the blades and then spray fluid into the housing as I crank the starter to turn the engine over.
Question is , is the engine adding fuel to the fixture when of I do this
#2
Charter Member #1171
Charter Member
Just as it would under normal start conditions yes
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#4
Registered
iTrader: (1)
With throttle in WOT position the ECM is placed in flood mode, which keeps the injectors from firing. Even if they were firing it would not be that much fuel
Another issue I would be more concerned with is fogging oil in the intake plenum. MPI motors should not be fogged because it coats the sensors. There is a tech bulletin out saying to mix up a gas and 2 cycle oil mix and run the motor on remote tank, which moves this stuff thru the fuel system
Another issue I would be more concerned with is fogging oil in the intake plenum. MPI motors should not be fogged because it coats the sensors. There is a tech bulletin out saying to mix up a gas and 2 cycle oil mix and run the motor on remote tank, which moves this stuff thru the fuel system
#5
Registered
Thread Starter
Thanx for the replies.
In previous years I would drain the metal spin on fuel filter and spray a few ounces of fogging fluid in it and crank the engine on that.
Each spring on the first day of boating the engine would stall after a short bit off running and take a very long time to restart.
I assumed that was due to my fogging method, so I decided to change that.
Sounds like I may just not fog it.
In previous years I would drain the metal spin on fuel filter and spray a few ounces of fogging fluid in it and crank the engine on that.
Each spring on the first day of boating the engine would stall after a short bit off running and take a very long time to restart.
I assumed that was due to my fogging method, so I decided to change that.
Sounds like I may just not fog it.
#7
Banned
iTrader: (9)
not one marine OEM engine manu has ever recommended fogging a EFI / MPI thru the intake. One is all your doing is coating the intake track and the runners alot with fogging oil and 2 is it messes up the map sensor and in apps that have a TMAP it really messes up those. And also depending on if applicable and location the fogging oil is messing up the IAT sensor. Also not good for the IAC to be coating them with fogging oil. Next is if your app has a IAC muffler you are really hurting the IAC causing a restriction.
Volvo penta come out with the best way to lay up marine engines in 1996. Merc followed that same procedures in 2001. But with way too much 2 stroke oil in the mix for a jist.
Volvo penta come out with the best way to lay up marine engines in 1996. Merc followed that same procedures in 2001. But with way too much 2 stroke oil in the mix for a jist.
Last edited by BUP; 10-15-2018 at 07:18 PM.
#8
Charter Member # 55
Charter Member
If you are going fog an efi engine, mix some 2 cycle oil or Marvels' Mystery oil into the fuel inside the water sep fuel filter.
Then after fogging, replace the fuel filter with e new one filled with fuel and a little Stabil.
Then after fogging, replace the fuel filter with e new one filled with fuel and a little Stabil.
#9
Registered
silly question but is there any harm in putting a new filter in, adding mystery marvel oil, and calling it good. That’s generally what we do.