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85 Ranger Throttle Response Issue


rusty ol ranger

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Any ideas why issue might persist? Tfi related? Idles really good just still has a hesitation at WOT. Does run alot smoother and responsive since the work i did do.
Im not super up on the feedback 2150's.

Generally on the older mechanical 2150's a hesitation right off idle would be the acclerator pump.

Bogging at full throttle would be most likely the bypass/power/WOT (whatever you wanna call it) valve, or incorrect float setting. It could also be a vacuum leak, or choke issue (as in its not opening)
 


ISX_15

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Im not super up on the feedback 2150's.

Generally on the older mechanical 2150's a hesitation right off idle would be the acclerator pump.

Bogging at full throttle would be most likely the bypass/power/WOT (whatever you wanna call it) valve, or incorrect float setting. It could also be a vacuum leak, or choke issue (as in its not opening)
Choke opens when motor is warm, that works properly. Acceleration pump replaced included the rubber plunge. All vacuum lines have been plugged (egr, vac tree, etc) in my eyes everything looks right but i think the problem is under my nose. Im going to see if replacing the carb filter helps because ive always had issues with dirty/clogged filters from a nasty fuel tank. Would new spark plugs help at all? Or anything tune up related?
 

ISX_15

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Im going to do more research on the ignition circuit upon further research maybe something to do with my timing advance? Maybe something electronically isnt right.
 

rusty ol ranger

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Choke opens when motor is warm, that works properly. Acceleration pump replaced included the rubber plunge. All vacuum lines have been plugged (egr, vac tree, etc) in my eyes everything looks right but i think the problem is under my nose. Im going to see if replacing the carb filter helps because ive always had issues with dirty/clogged filters from a nasty fuel tank. Would new spark plugs help at all? Or anything tune up related?
I mean plugs and a fuel filter isnt going to hurt anything for sure.

It could possibly be igniton related....but more with timing i would think...usually igniton issues (besides a coil) will cause a missfire more then an overall bog.
 

ISX_15

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I mean plugs and a fuel filter isnt going to hurt anything for sure.

It could possibly be igniton related....but more with timing i would think...usually igniton issues (besides a coil) will cause a missfire more then an overall bog.
Should i try picking up a control module from the parts store?
 

rusty ol ranger

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Should i try picking up a control module from the parts store?
Those usually will cause just flat stalling or refusal to start
 

ISX_15

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rusty ol ranger

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What about a fuel mixture solenoid on my carb? Or possibly timing?
Either of those could cause a bog at full throttle
 

franklin2

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Take the dist cap off and grab the rotor and push it back and forth.

When I was running the 2.8 I used to have one day it just quit and would not run anymore going down the highway. It would try to start after I towed it home but would not go. The weird thing about it, I was checking for spark and accidentally left #5 sparkplug wire off. Went in to crank it and it started right up, but of course it was missing on #5. So I stopped it, put #5 back on, went to start it, and it would not start. Weird? So I thought what are the chances? I took #5 sparkplug wire back off and it started. I then put a glove on and put #5 back on when it was running and it kept running. Really weird.

I kept messing with it, till I was messing with the distributor and found a lot of play in the main shaft of the distributor. This was my "rebuilt" Cardone distributor I bought. Of course by then you could not get one. I did a lot of reearch and found out the bushing they sell for the old mustang distributors was the same as these. Took it all apart, put a new bushing in place, and also robbed parts out of another distributor to work on the advance weight mechanism, it had a lot of wear also. Finally got it back in and it started right up, everything back to normal.
 

ISX_15

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The brass fitting for the fuel filter broke off inside the carb so i gotta pull it off now and retap new threads for the fuel inlet 😵💫
 

franklin2

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Easy out will not get the fitting out of the carb?
 

ISX_15

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Easy out will not get the fitting out of the carb?
Nope i just drilled everything out dissembled some things and cleaned everything out. Retapped new threads and used a hose adapter since i already have 2 filters inline.

alot of things were nasty and sludged but its cleaned up. The mixture control solenoid was also dirty and the gasket was just completely blocked?? Anyone can explain? Photos attatched. Other than that the replacement for it on ebay is 100$+

Also is there any articles on adjusting the electric choke?
IMG_3563.jpeg
IMG_3562.jpeg
IMG_3561.jpeg
 

rusty ol ranger

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Nope i just drilled everything out dissembled some things and cleaned everything out. Retapped new threads and used a hose adapter since i already have 2 filters inline.

alot of things were nasty and sludged but its cleaned up. The mixture control solenoid was also dirty and the gasket was just completely blocked?? Anyone can explain? Photos attatched. Other than that the replacement for it on ebay is 100$+

Also is there any articles on adjusting the electric choke?View attachment 111668View attachment 111669View attachment 111670

You have two filters inline?

Im not sure but dont the 2.8 run a mechanical fuel pump?

That could be causing some of your issue.
 

ISX_15

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You have two filters inline?

Im not sure but dont the 2.8 run a mechanical fuel pump?

That could be causing some of your issue.
Theres one under the frame rail i still need the replace and there is another that is suppose to go on the carb also, since that got broken i replaced it with a hose adapter and just put a clear filter in between, check photos, but fuel isnt a issue, pressure is good and carb was shooting fuel pretty good after i cleaned it up.

pretty much curious about the mixture solenoid and why it was capped off, my only guess is since its a ON OFF solenoid i assume it is blocked so it stays shut?
 

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