andrzejski Posted March 7, 2021 Share Posted March 7, 2021 Hi All - Apologies in advance for being a bonehead, but I've been googling around and can't quite track down an answer. Basically my '82 F-150 (4.9l) cut out and stopped running the other night. I thought I was out of gas; however, after refueling I haven't been able to start the truck up again. It turns over fine, but won't fire. A quick spray of starting fluid into the carb will fire the engine. While trying to diagnose, I realized once the key was turned on there was a ticking noise that started from underneath the filter. I took off the filter and I believe it's coming from the silver pod that's hanging off of the carb - is that related to the EGR valve? Once I disconnected it, the ticking noise stopped. Could the part be broken? I've attached a picture of the part that I believe is making the noise and also a youtube link illustrating the noise. I hadn't figured out where the noise was coming from when I shot the video, so I apologize for the angle. https://youtu.be/VGm0aiDkBDY Thanks for any help in advance! Link to comment Share on other sites More sharing options...
Gary Lewis Posted March 7, 2021 Share Posted March 7, 2021 Before we get into problem solving we need you to do as requested in the email you were sent. Please go to the New Members Start Here folder, read the guidelines, and then start a new topic/thread to introduce yourself. Why? Because that is where we keep the guidelines and it is important that you have an opportunity to read them since we hold everyone to them. So, once you've done that and the intro then we can start the troubleshooting here. Thanks in advance. Link to comment Share on other sites More sharing options...
andrzejski Posted March 7, 2021 Author Share Posted March 7, 2021 Before we get into problem solving we need you to do as requested in the email you were sent. Please go to the New Members Start Here folder, read the guidelines, and then start a new topic/thread to introduce yourself. Why? Because that is where we keep the guidelines and it is important that you have an opportunity to read them since we hold everyone to them. So, once you've done that and the intro then we can start the troubleshooting here. Thanks in advance. My apologies! I will do that. Thank you, Gary. Link to comment Share on other sites More sharing options...
Gary Lewis Posted March 7, 2021 Share Posted March 7, 2021 My apologies! I will do that. Thank you, Gary.Well done, Andrew.  That is a strange noise! I'm going to embed the Youtube video here to make it easier for the folks. (I've ticked the "Message Is In HTML Format" box and am pasting in the "embed code" I got from clicking "Share" on your video.) The thing in your picture is probably the stepper motor that the computer uses to control the air/fuel mix on your carb. But it shouldn't sound like that. And I don't know why it would be doing that. I'm going to tag Bill/85lebaront2 as he's a guru on carbs and he may know. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted March 7, 2021 Share Posted March 7, 2021 Before we get into problem solving we need you to do as requested in the email you were sent. Please go to the New Members Start Here folder, read the guidelines, and then start a new topic/thread to introduce yourself. Why? Because that is where we keep the guidelines and it is important that you have an opportunity to read them since we hold everyone to them. So, once you've done that and the intro then we can start the troubleshooting here. Thanks in advance. Solenoid, not stepper motor. https://www.carburetor-blog.com/knowledge-base/carter-yfa-1-barrel-carburetor-rebuild Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted March 7, 2021 Share Posted March 7, 2021 Solenoid, not stepper motor. https://www.carburetor-blog.com/knowledge-base/carter-yfa-1-barrel-carburetor-rebuild Alright, I guess i have inserted foot firmly in mouth. What I know as the duty cycle solenoid wasn't introduced until later, and for '82 this would be called the idle control stepper. Anyway, as usual, Mike's has some good tips about these carbs. I'm linking this exploded view (which explains my confusion on the proper nomenclature) Â Link to comment Share on other sites More sharing options...
Gary Lewis Posted March 7, 2021 Share Posted March 7, 2021 Alright, I guess i have inserted foot firmly in mouth. What I know as the duty cycle solenoid wasn't introduced until later, and for '82 this would be called the idle control stepper. Anyway, as usual, Mike's has some good tips about these carbs. I'm linking this exploded view (which explains my confusion on the proper nomenclature) Jim - I really don't know that much about the YFA's, so didn't know if it was a solenoid or stepper. Anyway, your question about pump or carb is good. Perhaps the ticking noise is just a result of not having fuel, and we know the truck will start if it has it. Andrew - We need to ascertain if the fuel pump is working. There is probably a steel line going from the carb to the fuel pump, but it is possible that someone replaced it with rubber. Can you loosen the fitting where the line goes into the carb and crank the engine to see if fuel comes out there? The best would be to take the line off of the carb and put it in something like a coffee can, but some times with a steel line that is hard to do. But you don't want fuel going everywhere either. So if you can't get it into a can then put the fitting on but loosely so it'll leak a bit. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted March 7, 2021 Share Posted March 7, 2021 Jim - I really don't know that much about the YFA's, so didn't know if it was a solenoid or stepper. Anyway, your question about pump or carb is good. Perhaps the ticking noise is just a result of not having fuel, and we know the truck will start if it has it. Andrew - We need to ascertain if the fuel pump is working. There is probably a steel line going from the carb to the fuel pump, but it is possible that someone replaced it with rubber. Can you loosen the fitting where the line goes into the carb and crank the engine to see if fuel comes out there? The best would be to take the line off of the carb and put it in something like a coffee can, but some times with a steel line that is hard to do. But you don't want fuel going everywhere either. So if you can't get it into a can then put the fitting on but loosely so it'll leak a bit. I know it is supposed to cycle like that, but I don't think it should be so loud. When I have taken these apart before, the seal inside provided a soft seat. They never clacked like that. I don't think they are modulating fuel, just air, but I may be wrong. Bill could probably say for sure. Link to comment Share on other sites More sharing options...
85lebaront2 Posted March 7, 2021 Share Posted March 7, 2021 Jim - I really don't know that much about the YFA's, so didn't know if it was a solenoid or stepper. Anyway, your question about pump or carb is good. Perhaps the ticking noise is just a result of not having fuel, and we know the truck will start if it has it. Andrew - We need to ascertain if the fuel pump is working. There is probably a steel line going from the carb to the fuel pump, but it is possible that someone replaced it with rubber. Can you loosen the fitting where the line goes into the carb and crank the engine to see if fuel comes out there? The best would be to take the line off of the carb and put it in something like a coffee can, but some times with a steel line that is hard to do. But you don't want fuel going everywhere either. So if you can't get it into a can then put the fitting on but loosely so it'll leak a bit. It is the mixture control and is a duty cycle solenoid in that it pulses the small valves that control the air bleeds to the idle and main mixture passages. I have never heard one make that much noise, they do "tick" when running. I would first make sure it isn't loose on the bowl cover. If it isn't loose and the crimp on the "can" portion (where that actual solenoid part is) hasn't come loose then I would see about finding a replacement. Feedback carburetors, with the exception of a few Ford ones used a duty cycle solenoid for mixture control, and a soft ticking noise is the norm for them, in fact if you don't hear it or can at least feel the pulses, there is a problem. Maybe someone on here who has removed the feedback system might have a good used carburetor for parts. Link to comment Share on other sites More sharing options...
ratdude747 Posted March 7, 2021 Share Posted March 7, 2021 It is the mixture control and is a duty cycle solenoid in that it pulses the small valves that control the air bleeds to the idle and main mixture passages. I have never heard one make that much noise, they do "tick" when running. I would first make sure it isn't loose on the bowl cover. If it isn't loose and the crimp on the "can" portion (where that actual solenoid part is) hasn't come loose then I would see about finding a replacement. Feedback carburetors, with the exception of a few Ford ones used a duty cycle solenoid for mixture control, and a soft ticking noise is the norm for them, in fact if you don't hear it or can at least feel the pulses, there is a problem. Maybe someone on here who has removed the feedback system might have a good used carburetor for parts. Very odd for an '82 to have that... I thought that was a '84+ thing as part of the EEC-IV & TFI introduction. Unless this is a hack job, they'd have to swap the entire engine harness, including the ECU wiring in the dash. Something doesn't add up here... --- I only ever hear mine click after turning the engine off.. never before starting. Link to comment Share on other sites More sharing options...
Recommended Posts