Bogs when WOT

[ISX_15]

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]

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]

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

 

[ISX_15]

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]

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

From what ive read i think i have 2150A

 

[ISX_15]

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]

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]

That’s the accelerator pump, if it’s leaking get new gaskets / seals and replace them.

 

[AndyB.]

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

1983 1984 1985 Ford Mustang Mercury Capri NOS Carburetor Accel Pump Diaphragm | eBay

Find many great new & used options and get the best deals for 1983 1984 1985 Ford Mustang Mercury Capri NOS Carburetor Accel Pump Diaphragm at the best online prices at eBay! Free shipping for many products!

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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]

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

1983 1984 1985 Ford Mustang Mercury Capri NOS Carburetor Accel Pump Diaphragm | eBay

Find many great new & used options and get the best deals for 1983 1984 1985 Ford Mustang Mercury Capri NOS Carburetor Accel Pump Diaphragm at the best online prices at eBay! Free shipping for many products!

www.ebay.com

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]

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

1983 1984 1985 Ford Mustang Mercury Capri NOS Carburetor Accel Pump Diaphragm | eBay

Find many great new & used options and get the best deals for 1983 1984 1985 Ford Mustang Mercury Capri NOS Carburetor Accel Pump Diaphragm at the best online prices at eBay! Free shipping for many products!

www.ebay.com

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]

Do i also cap off green wire? I think its egr vacuum

 

[AndyB.]

Not after market, breather unconnected so i could take off intake dish thing lol

Then why is there a giant nut on the air cleaner stud?

 

[AndyB.]

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]

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.