kristopherdb Posted September 13, 2017 Author Share Posted September 13, 2017 4.9L you do have a feedback system, that is how Detroit got carbureted engines to meet emission requirements. The burning questions are: (A) are they using CA standards? That brings us the (B) is the truck a CA spec, 50 state spec or 49 state spec? if it is a 49 state and they are using CA spec requirements you might have a problem unless you can convince them it is correct as sold. Check that the bowl to throttle body screws are tight and the gasket isn't bad, that will make a YFA run richer than it should, make sure the mixture control solenoid is working (you should be able to feel it cycling by putting you finger on it. Fresh oil change, new PCV valve will also help, What brand of parts are you buying, my son had a royal fit trying to use aftermarket sensors on a 1986 EFI 302.In this pic I stole from where the #2 bell thing at the bottom to the carb that hose has a huge crack/tear in it whatever it is _____________________________From: Kris Buxton <redacted_email_address>Sent: Tuesday, September 12, 2017 7:30 PMSubject: Re: Failed DEQ againTo: 85lebaront2 [via Bullnose Enthusiasts] <redacted_email_address> I need more help on troubleshooting the solenoid. I don't feel clicking but the whole motor running could easily cover that. While trying to feel it directly under it towards me there is a gold bell looking thing with a hose going to the bottom of the carb. There is a huge hole in it On Tue, Sep 12, 2017 at 7:04 PM, Knotty Kris <redacted_email_address> wrote: Link to comment Share on other sites More sharing options...
PetesPonies Posted September 13, 2017 Share Posted September 13, 2017 Depends what year you have as to if you have a feedback system. !984 up for the 49 states was feedback. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted September 13, 2017 Share Posted September 13, 2017 In this pic I stole from where the #2 bell thing at the bottom to the carb that hose has a huge crack/tear in it whatever it is [image] I need more help on troubleshooting the solenoid. I don't feel clicking but the whole motor running could easily cover that. While trying to feel it directly under it towards me there is a gold bell looking thing with a hose going to the bottom of the carb. There is a huge hole in it Image-3.png (1M) <http://bullnose-enthusiasts.12971.n8.nabble.com/attachment/1584/0/Image-3.png> That looks like the A.I.R. check valve. Is the smog pump on your engine working? Definitely replace the hose (with any hose) The thermactor system is there to burn off excess CO before it can make it out the pipe. Link to comment Share on other sites More sharing options...
kristopherdb Posted September 13, 2017 Author Share Posted September 13, 2017 In this pic I stole from where the #2 bell thing at the bottom to the carb that hose has a huge crack/tear in it whatever it is [image] I need more help on troubleshooting the solenoid. I don't feel clicking but the whole motor running could easily cover that. While trying to feel it directly under it towards me there is a gold bell looking thing with a hose going to the bottom of the carb. There is a huge hole in it Image-3.png (1M) <http://bullnose-enthusiasts.12971.n8.nabble.com/attachment/1584/0/Image-3.png> That looks like the A.I.R. check valve. Is the smog pump on your engine working? Definitely replace the hose (with any hose) The thermactor system is there to burn off excess CO before it can make it out the pipe. After looking at some images it does look like a Air Injection check valve http://www.ebay.com/itm/AIR-INJECTION-CHECK-VALVE-fits-83-97-Ford-E8DZ-9A487-A-Motorcraft-CX-760-A/261332690775?epid=74539344&fits=Make%3AFord%7CModel%3AF-150&hash=item3cd8a46757%3Ag%3AWJ8AAOxyLN9SiT8L can someone confirm? Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted September 13, 2017 Share Posted September 13, 2017 After looking at some images it does look like a Air Injection check valve http://www.ebay.com/itm/AIR-INJECTION-CHECK-VALVE-fits-83-97-Ford-E8DZ-9A487-A-Motorcraft-CX-760-A/261332690775?epid=74539344&fits=Make%3AFord%7CModel%3AF-150&hash=item3cd8a46757%3Ag%3AWJ8AAOxyLN9SiT8L can someone confirm? It is..... Link to comment Share on other sites More sharing options...
PetesPonies Posted September 13, 2017 Share Posted September 13, 2017 After looking at some images it does look like a Air Injection check valve http://www.ebay.com/itm/AIR-INJECTION-CHECK-VALVE-fits-83-97-Ford-E8DZ-9A487-A-Motorcraft-CX-760-A/261332690775?epid=74539344&fits=Make%3AFord%7CModel%3AF-150&hash=item3cd8a46757%3Ag%3AWJ8AAOxyLN9SiT8L can someone confirm? You haven't said what year the truck is , or I have missed that. Link to comment Share on other sites More sharing options...
kristopherdb Posted September 13, 2017 Author Share Posted September 13, 2017 In this pic I stole from where the #2 bell thing at the bottom to the carb that hose has a huge crack/tear in it whatever it is [image] I need more help on troubleshooting the solenoid. I don't feel clicking but the whole motor running could easily cover that. While trying to feel it directly under it towards me there is a gold bell looking thing with a hose going to the bottom of the carb. There is a huge hole in it Image-3.png (1M) <http://bullnose-enthusiasts.12971.n8.nabble.com/attachment/1584/0/Image-3.png> That looks like the A.I.R. check valve. Is the smog pump on your engine working? Definitely replace the hose (with any hose) The thermactor system is there to burn off excess CO before it can make it out the pipe. yes the new smog pump is working and turning, where the hose comes off the valve and into the carb its all rubber and split badly, lots of warm air coming out of the hole. Link to comment Share on other sites More sharing options...
kristopherdb Posted September 13, 2017 Author Share Posted September 13, 2017 You haven't said what year the truck is , or I have missed that. its a 1985 4x4 300 Im not sure why my signature doesn't show it sorry Link to comment Share on other sites More sharing options...
kristopherdb Posted September 13, 2017 Author Share Posted September 13, 2017 yes the new smog pump is working and turning, where the hose comes off the valve and into the carb its all rubber and split badly, lots of warm air coming out of the hole. would this make me run rich and be the cause of my failed DEQ? Can I buy a roll of some sized vacuum line and replace most of them myself or do you have to buy it piece by piece? This piece of tubing looks bigger of course but most of them are all pencil sized and sat for 15 years. Link to comment Share on other sites More sharing options...
Gary Lewis Posted September 13, 2017 Share Posted September 13, 2017 would this make me run rich and be the cause of my failed DEQ? Can I buy a roll of some sized vacuum line and replace most of them myself or do you have to buy it piece by piece? This piece of tubing looks bigger of course but most of them are all pencil sized and sat for 15 years. If the air from the pump is not going where it is supposed to go then the catalytic converter can't burn off all the fuel and, I would think, that would show up as being rich. And you can by rolls of different-sized vacuum line from the auto parts store and just cut the right length pieces. Link to comment Share on other sites More sharing options...
Recommended Posts