Volvo 5.0 gi/sx GM TBI fogging

[BryceW]

I have a Volvo 5.0 gi/sx GM, year 1999 (cannot find the engine tag yet). First winter with this new boat and I was going to take it to a mechanic mainly for the fogging procedure outlined in the engine manual. It seemed complicated and I didn't have enough time to figure it out before needing to winterize. The 2 mechanics I talked to said they didn't fog fuel injected engines anymore because it can mess up the sensors, can cause more damage then preventing. I read on another post that for a TBI all I need to do is spray fogging oil into the throttle body, like one would on a carbed engine until it stalls.

What would be the best to do?
1. Full fogging procedure in the manual? (external tank, etc.)
2. Spray fogger into the throttle body? or
3. Do not fog?
Thanks for any advice.
Bryce

 

[Don S]

Re: Volvo 5.0 gi/sx GM TBI fogging

What would be the best to do?
1. Full fogging procedure in the manual? (external tank, etc.)
2. Spray fogger into the throttle body? or
3. Do not fog?

The OEM service manual says to run EFI engines on the mixture. So I would have to say that is the "Best" way.

 

[BryceW]

Re: Volvo 5.0 gi/sx GM TBI fogging

Thanks Don. Do you have any insight on damaging the sensors? Do you think I am going to have problems if I don't fog at all? or if I only fog with the spray?
Thanks

 

[Don S]

Re: Volvo 5.0 gi/sx GM TBI fogging

You aren't going to damage any sensors using the mixture. Volvo wouldn't recommend the mixture if it hurt things.

You also aren't going to damage any spraying fogging oil into the throttle body, Just don't expect to spray till it dies, it won't. Once if starts smoking a lot, you know it's fogged, just shut the engine off.

 

[2000fourwinns]

Re: Volvo 5.0 gi/sx GM TBI fogging

Ditto on the fogging. I have a 2000 5.0L Gi and just fogged it 2 days ago. Just spray it into the throttle body as heavy as you can (next year I am going to use 2 cans at the same time), when it is smoking real good, then turn it off. It wont hurt anything.

 

[gbeltran]

Re: Volvo 5.0 gi/sx GM TBI fogging

Fogging works, but doing it the Volvo recommended way also gets lubricant into that 800 dollar fuel cell assembly....just something to think about.

 

[BryceW]

Thanks for the tips. After reading more about it and looking at the engine, I don't think the Volvo method is going to be very difficult after all. Planning on doing it this week. Would anyone be willing to share their experience draining all of the hoses and drain plugs? Going to tackle that as well.