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Bogs when WOT


ISX_15

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1985 ranger with stock tfi, noticed the truck bogs really bad when WOT, but not when throttle is applied slowly. What should i look into?
 


901wd#2

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My credo
If it has two heads, it better have more than six cylinders.
Accelerator pump. Years ago I had a 2.8 that would fall on its face when you gave it some gas so I bent the rod to the accelerator pump and it solved the problem.
 

alwaysFlOoReD

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Some of those older carbs had leather accelerator pump cups. They dry out if the truck sits.
 

ISX_15

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how exactly? I notice mine is leaking gas on the manifold, do i just need a whole new one or a whole new carb?
 

ISX_15

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ISX_15

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Location
Phoenix, Arizona
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1985
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Ford
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2.8 V6
Engine Size
2.8L
Transmission
Manual
2WD / 4WD
2WD
Tire Size
245/60r14
Near the passenger side fender theres a harness with nothing plugged in, i think its the map sensor thats missing, anything worth doing there?
 

alwaysFlOoReD

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While I own a 2.8, its in a 77 pinto and not nearly as much vacuum tubing and emissions stuff to deal with. I can't help much with yours, I don't know the system well.
 

901wd#2

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My credo
If it has two heads, it better have more than six cylinders.
That’s the accelerator pump, if it’s leaking get new gaskets / seals and replace them.
 

Attachments

AndyB.

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This is what gets replaced with the accelerator pump, just the diaphragm:


That vacuum port should be capped.

Do you have an aftermarket air filter housing? There would have originally been an orange hard plastic vacuum line to control the fresh air intake vacuum motor. You’ll want that capped off if it isn’t in place. Is the breather hose not connected and pulling unfiltered air into the crankcase?
 

ISX_15

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Phoenix, Arizona
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1985
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Ford
Engine Type
2.8 V6
Engine Size
2.8L
Transmission
Manual
2WD / 4WD
2WD
Tire Size
245/60r14
This is what gets replaced with the accelerator pump, just the diaphragm:


That vacuum port should be capped.

Do you have an aftermarket air filter housing? There would have originally been an orange hard plastic vacuum line to control the fresh air intake vacuum motor. You’ll want that capped off if it isn’t in place. Is the breather hose not connected and pulling unfiltered air into the crankcase?
Not after market, breather unconnected so i could take off intake dish thing lol
 

ISX_15

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Location
Phoenix, Arizona
Vehicle Year
1985
Make / Model
Ford
Engine Type
2.8 V6
Engine Size
2.8L
Transmission
Manual
2WD / 4WD
2WD
Tire Size
245/60r14
This is what gets replaced with the accelerator pump, just the diaphragm:


That vacuum port should be capped.

Do you have an aftermarket air filter housing? There would have originally been an orange hard plastic vacuum line to control the fresh air intake vacuum motor. You’ll want that capped off if it isn’t in place. Is the breather hose not connected and pulling unfiltered air into the crankcase?
And which vaacuum port needs to be capped? The one above the accell pump? If so if im not mistaken i already capped it, it goes to the charcoal canister if im not mistaken.
 

ISX_15

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Phoenix, Arizona
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1985
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Ford
Engine Type
2.8 V6
Engine Size
2.8L
Transmission
Manual
2WD / 4WD
2WD
Tire Size
245/60r14
Do i also cap off green wire? I think its egr vacuum
 

ISX_15

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Joined
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Location
Phoenix, Arizona
Vehicle Year
1985
Make / Model
Ford
Engine Type
2.8 V6
Engine Size
2.8L
Transmission
Manual
2WD / 4WD
2WD
Tire Size
245/60r14
Then why is there a giant nut on the air cleaner stud?
I bought a new pcv valve when i was a teenager and it was a 2 way, needed a 1 way so i blocked off the open end.
 

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