85 carb 2.8 stalling
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85 carb 2.8 stalling
does anybody know what the temperature compensated accelerator pump solenoid does on the carburetor
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my 85 2.8 2bbl sometimes will idle high or and then will decrease idle speed until it stalls. Even with the pedal holding idle at 1000 it will sometimes idle down. It will hold idle speed at higher speeds with more pedal. It idles fine in the summer. And it has over 200K miles on original engine
<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com
fficeffice" /><o></o>my 85 2.8 2bbl sometimes will idle high or and then will decrease idle speed until it stalls. Even with the pedal holding idle at 1000 it will sometimes idle down. It will hold idle speed at higher speeds with more pedal. It idles fine in the summer. And it has over 200K miles on original engine
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I'm not sure what a compensated accelerator pump solenoid is but I have the same problem with my 85 ranger. Ive replaced the carburator with a remanufactured one. Ive also replaced wires a few times, plugs, adjusted the carburator, and everything else that would make sense to do. My truck still stalls every day it's just on and off. beats me? If you obtain any information on our problem, please reply.
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Joined: Nov 2003
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From: Homer, Alaska
Check for a vacuum leak. I had a similar problem and it turned out to be the hose going to the modulator on the tranny. A vacuum guage is pretty cheap and will tell you a lot about the engine.
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Thanks I'll have to check that. When I accelerate in almost any gear at low rpms my engine jumps and sputters. Ive replaced a distributor cap, fuel pump, wires, and everything like I said but it still happens. Can this also be a result of a vacuum leak as well, or could it be that my distributor is worn out? Any ideas??
Freshman User
Joined: Dec 1999
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From: Lisbon Falls USA
You hit the nail on the head
Guys can anyone out there explain this oddity??
My 85 2.8 has been doing this same damn thing. I've done damn near everything and can not find out what causing the problem. The temp compensated throttle thing is on the front of the carb and is actually a vacumn operated valve. There is a control solenoid on the firewall that turns on the vac to the valve. I have replaced both items and it still comes and goes in cold weather. I removed and plugged the line so the valve wouldn't run and got flat spots stepping into the accelerator that would darn near kill the engine in cold weather. I have also rebuilt the carb, chased every vac line looking for leaks.
Heck if someone even knew someone I could call that might have fixed this issue it would be a great help???
My 85 2.8 has been doing this same damn thing. I've done damn near everything and can not find out what causing the problem. The temp compensated throttle thing is on the front of the carb and is actually a vacumn operated valve. There is a control solenoid on the firewall that turns on the vac to the valve. I have replaced both items and it still comes and goes in cold weather. I removed and plugged the line so the valve wouldn't run and got flat spots stepping into the accelerator that would darn near kill the engine in cold weather. I have also rebuilt the carb, chased every vac line looking for leaks.
Heck if someone even knew someone I could call that might have fixed this issue it would be a great help???
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Two areas to check. Fuel control solenoid on the back of the carb and the TFI Ignition Control Module on the Distributor. Both cause weird problems. The FCS controls the fuel mixture and if part of the TFI circuit is having problems it will cause you to have a fixed spark timing. My '83 and '85 both ran rough in wet weather and cold weather. The '83 also used to surge really hard if you got on the gas. It was primarily an ignition problem. The vacuum controled valve which enriches the mixture under load is located under the fuel bowl on the carb, it can flood the engine if the vacuum diaphram ruptures, as the vacuum system will pull gas directly into the manifold riser block. Hope some of that helps, those feedback carbs tend to be a real headache.
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Ford distributor in these years had a TFI module on the side which would cause it to stall. I had this
problem on my Ford F150 and I resolved the problem after receiving Ford's recall notice and replacing
the TFI module. https://www.autosafety.org/ford-tfi-...ss-settlement/
problem on my Ford F150 and I resolved the problem after receiving Ford's recall notice and replacing
the TFI module. https://www.autosafety.org/ford-tfi-...ss-settlement/
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Joined: Jan 2001
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From: Virginia
Guys can anyone out there explain this oddity??
My 85 2.8 has been doing this same damn thing. I've done damn near everything and can not find out what causing the problem. The temp compensated throttle thing is on the front of the carb and is actually a vacumn operated valve. There is a control solenoid on the firewall that turns on the vac to the valve. I have replaced both items and it still comes and goes in cold weather. I removed and plugged the line so the valve wouldn't run and got flat spots stepping into the accelerator that would darn near kill the engine in cold weather. I have also rebuilt the carb, chased every vac line looking for leaks.
Heck if someone even knew someone I could call that might have fixed this issue it would be a great help???
My 85 2.8 has been doing this same damn thing. I've done damn near everything and can not find out what causing the problem. The temp compensated throttle thing is on the front of the carb and is actually a vacumn operated valve. There is a control solenoid on the firewall that turns on the vac to the valve. I have replaced both items and it still comes and goes in cold weather. I removed and plugged the line so the valve wouldn't run and got flat spots stepping into the accelerator that would darn near kill the engine in cold weather. I have also rebuilt the carb, chased every vac line looking for leaks.
Heck if someone even knew someone I could call that might have fixed this issue it would be a great help???
At lower temps, the accelerator pump works normally giving a full shot of fuel. When the engine is hotter and doesn't need the full shot of fuel, vacuum is placed on the diaphragm at the front of the carb. This opens a valve that bleeds off some of the accelerator fuel shot. If you disconnect the vacuum line, you get a fuel shot no matter what temperature.
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