IP adjustment
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Junior User
Joined: Nov 2007
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From: ansonia
IP adjustment
i have a 88 ford f350 4x4 with a 7.3, from what i understand the last
owner turned the pump up one hole turn. so i need to turn it back down.
so what i need to know is do you turn it in or out to lean it out ??
thanks for any advice.....
owner turned the pump up one hole turn. so i need to turn it back down.
so what i need to know is do you turn it in or out to lean it out ??
thanks for any advice.....
Posting Guru
Joined: Oct 2005
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From: Powell River B.C.
It must smoke very black if it was turned up that much!!!! It is likely mis- information, I'm not sure it is possible to turn it up a whole turn, assuming that it was in fact the fuel limiting screw under the triangle plate on the passanger side of the IP we are talking about. Normally 1 flat or 1/6 of a turn is plenty enough for more fuel and power. Diesels do not run rich or lean FWIW, only run faster or slower with more or less power for the amount of fuel delivered on each power stroke. If you need to turn it down you will be backing the screw out.
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Junior User
Joined: Nov 2007
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From: ansonia
i had it running and took the air cleaner off, i took a little diesel in a cup and put it
in the intake. it started running a little funny for a sec but i got black smoke.
could they have turned it down instead of up? or could the fuel pump be getting week ?
in the intake. it started running a little funny for a sec but i got black smoke.
could they have turned it down instead of up? or could the fuel pump be getting week ?
Post Fiend
Joined: Nov 2003
Posts: 21,285
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From: Nutter Fort, WV
Liquids in the intake is a bad idea.
The piston and head are only seperated by the thickness of the head gasket at TDC.
If you happen to get enough fluid in the cylinder to take up all of the space between the piston and head on a running engine, very bad things happen.
The list may include one or more of the following, broken piston, broken/bent connecting rod, broken crank, cracked block.
Fluids do not compress.
How does the engine run?
With no black smoke I would say the IP has not been turned up, and definitely not turned up a full turn.
The piston and head are only seperated by the thickness of the head gasket at TDC.
If you happen to get enough fluid in the cylinder to take up all of the space between the piston and head on a running engine, very bad things happen.
The list may include one or more of the following, broken piston, broken/bent connecting rod, broken crank, cracked block.
Fluids do not compress.
How does the engine run?
With no black smoke I would say the IP has not been turned up, and definitely not turned up a full turn.
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Junior User
Joined: Nov 2007
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From: ansonia
it runs goog and smooth for the most part , but at about 2000 rpm, it will studder
or miss , and has a lot of gray smoke. the fuel filter looks a little old, so that may be what it is. or the fuel pump may be a little week. thanks for the tip on not puting
fuel in the intake. i hope i didnt hurt it. anyways to me it sounds like lack of fuel feed
or air in the fuel system.
or miss , and has a lot of gray smoke. the fuel filter looks a little old, so that may be what it is. or the fuel pump may be a little week. thanks for the tip on not puting
fuel in the intake. i hope i didnt hurt it. anyways to me it sounds like lack of fuel feed
or air in the fuel system.
Post Fiend
Joined: Nov 2003
Posts: 21,285
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From: Nutter Fort, WV
If you would have put enough fluid in the intake, there would be no mistake that it was hurt.
When the piston with enough fluid in the cylinder to take up all the room at the top of the stroke, the piston would have stopped instantly, just like it ran into the head.
That sudden stop is what breaks things.
Fluid in the cylinder causes the engine to hydrolock.
Change the fuel filter.
Get a pressure gauge, then remove the valve core in the fuel filter bleeder valve.
Attach the guage there with a hose.
With the engine idling you should have between 4 and 8 PSI fuel pressure.
Now turn the engine off, leave the hose on the filter.
Route the hose into a container and have someone crank the engine for 10 seconds.
You should have at least 1/3 pint in the container.
If either of the above are not up to spec, replace the lift pump.
When the piston with enough fluid in the cylinder to take up all the room at the top of the stroke, the piston would have stopped instantly, just like it ran into the head.
That sudden stop is what breaks things.
Fluid in the cylinder causes the engine to hydrolock.
Change the fuel filter.
Get a pressure gauge, then remove the valve core in the fuel filter bleeder valve.
Attach the guage there with a hose.
With the engine idling you should have between 4 and 8 PSI fuel pressure.
Now turn the engine off, leave the hose on the filter.
Route the hose into a container and have someone crank the engine for 10 seconds.
You should have at least 1/3 pint in the container.
If either of the above are not up to spec, replace the lift pump.
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Junior User
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From: ansonia
well i changed the fuel filter, the truck runs 70 % better. the gray smoke is slowing down
the more it runs, but still no dark or black smoke when i rev it up. but the studder or
mis is gone, runs a lot smoother.also starts a lot better and faster.
the more it runs, but still no dark or black smoke when i rev it up. but the studder or
mis is gone, runs a lot smoother.also starts a lot better and faster.
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Posting Guru
Joined: Jan 2005
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From: Douglas, Georgia
you're retarded...
err I mean, your pump is.
chances are the pump has worn over time and just needs to be advanced. you can do it, or you can have it professionally timed.
If I was you, I'd advance it a hair myself (run a search on it) if that fixes it up, either run it or have it timed.
err I mean, your pump is.
chances are the pump has worn over time and just needs to be advanced. you can do it, or you can have it professionally timed.
If I was you, I'd advance it a hair myself (run a search on it) if that fixes it up, either run it or have it timed.
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