FuzzFace2 Posted February 22, 2021 Share Posted February 22, 2021 I do have a splitter up high on the firewall. Nothing is hooked to it either. What is this? It is mounted to a plate that sits between the carb and the intake manifold. There is no line hooked to it. http://forum.garysgaragemahal.com/file/n89157/20210221_165925.jpg That would be the EGR and it can be left the way it is. Some times the EGR will get stuck open a little and cause issues. What some do is pull the valve off and make a block off plate using a tin can to fit between the valve & housing. As for the splitter on the fire wall. 1 port will have a hose going to the intake for supply. A port could go to the transmission. Another port supplies vacuum to the HVAC controls when the truck has AC. Dave ---- Link to comment Share on other sites More sharing options...
FuzzFace2 Posted February 22, 2021 Share Posted February 22, 2021 I do have a splitter up high on the firewall. Nothing is hooked to it either. What is this? It is mounted to a plate that sits between the carb and the intake manifold. There is no line hooked to it. http://forum.garysgaragemahal.com/file/n89157/20210221_165925.jpg That would be the EGR and it can be left the way it is. Some times the EGR will get stuck open a little and cause issues. What some do is pull the valve off and make a block off plate using a tin can to fit between the valve & housing. As for the splitter on the fire wall. 1 port will have a hose going to the intake for supply. A port could go to the transmission. Another port supplies vacuum to the HVAC controls when the truck has AC. Dave ---- You can take carb or brake clean and spray it around the base of the carb, between the intake manifold and head, and any place you see a vacuum line / hose. With the motor running and up to temp when spraying if the idle speed changes there is a vacuum leak in that area. Dave ---- Link to comment Share on other sites More sharing options...
Atlas75 Posted February 24, 2021 Author Share Posted February 24, 2021 I do have a splitter up high on the firewall. Nothing is hooked to it either. What is this? It is mounted to a plate that sits between the carb and the intake manifold. There is no line hooked to it. http://forum.garysgaragemahal.com/file/n89157/20210221_165925.jpg That would be the EGR and it can be left the way it is. Some times the EGR will get stuck open a little and cause issues. What some do is pull the valve off and make a block off plate using a tin can to fit between the valve & housing. As for the splitter on the fire wall. 1 port will have a hose going to the intake for supply. A port could go to the transmission. Another port supplies vacuum to the HVAC controls when the truck has AC. Dave ---- Thanks for the info on the EGR. I think I will leave it alone for now. As for the splitter, this is what I have. Nothing is hooked to it. My trans comes directly off the intake manifold and my heater controls don't appear to use vacuum. It must have been used for something else that is no longer hooked up. Link to comment Share on other sites More sharing options...
Atlas75 Posted February 24, 2021 Author Share Posted February 24, 2021 Thanks for the info on the EGR. I think I will leave it alone for now. As for the splitter, this is what I have. Nothing is hooked to it. My trans comes directly off the intake manifold and my heater controls don't appear to use vacuum. It must have been used for something else that is no longer hooked up. Oh...and what is that tag screwed in just to the right of the vacuum splitter? Link to comment Share on other sites More sharing options...
Atlas75 Posted February 24, 2021 Author Share Posted February 24, 2021 These numbers? I’ll see if I can find one of his videos. Wait...isn’t there supposed to be a wire attached to that metal tab on the choke? Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted February 24, 2021 Share Posted February 24, 2021 Thanks for the info on the EGR. I think I will leave it alone for now. As for the splitter, this is what I have. Nothing is hooked to it. My trans comes directly off the intake manifold and my heater controls don't appear to use vacuum. It must have been used for something else that is no longer hooked up. That's a Buck Tag It follows the cab (there's another on the bed) through the body making and paint process, and tells the line workers what kind of options get attached (eg a diesel would have a completely different wiring harness) There should be a black & white wire from the alternator stator.... or the regulator, IDK on a truck your age but it should be in the EVTM Link to comment Share on other sites More sharing options...
Atlas75 Posted February 24, 2021 Author Share Posted February 24, 2021 That's a Buck Tag It follows the cab (there's another on the bed) through the body making and paint process, and tells the line workers what kind of options get attached (eg a diesel would have a completely different wiring harness) There should be a black & white wire from the alternator stator.... or the regulator, IDK on a truck your age but it should be in the EVTM EVTM shows 3 wires coming from my alternator. I only have 2. I guess I need to find a new plug so I can run a wire to the choke. The stator wire seems to be missing. Link to comment Share on other sites More sharing options...
Gary Lewis Posted February 24, 2021 Share Posted February 24, 2021 EVTM shows 3 wires coming from my alternator. I only have 2. I guess I need to find a new plug so I can run a wire to the choke. The stator wire seems to be missing. I don't think you'd have to have the plug. If I remember correctly the connection in the alternator is a 1/4" male, so if you had an insulated 1/4" female you could use it instead of the plug. Link to comment Share on other sites More sharing options...
Atlas75 Posted March 1, 2021 Author Share Posted March 1, 2021 I don't think you'd have to have the plug. If I remember correctly the connection in the alternator is a 1/4" male, so if you had an insulated 1/4" female you could use it instead of the plug. I had a bit of time this weekend to work on a few of the critical issues that needed to be addressed. I removed the cowl and reattached the wiper linkage and retainer clip so I now have functional wipers. After reinstalling the cowl I installed the hood to cowl gasket I ordered from LMC truck. I messed around with the vacuum a bit more and I now have 14” of manifold vacuum. Not sure where else it could be leaking from but I’ll keep looking. I have a question about the connectors under the hood. Are there pigtails available for the plug that brings the temp sensor signal and oil pressure signal to the dash? My temp signal wire is toast and I would prefer to splice in a new connector on the engine side. It is like this in many spots. Photo of plug on engine side. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted March 1, 2021 Share Posted March 1, 2021 I had a bit of time this weekend to work on a few of the critical issues that needed to be addressed. I removed the cowl and reattached the wiper linkage and retainer clip so I now have functional wipers. After reinstalling the cowl I installed the hood to cowl gasket I ordered from LMC truck. I messed around with the vacuum a bit more and I now have 14” of manifold vacuum. Not sure where else it could be leaking from but I’ll keep looking. I have a question about the connectors under the hood. Are there pigtails available for the plug that brings the temp sensor signal and oil pressure signal to the dash? My temp signal wire is toast and I would prefer to splice in a new connector on the engine side. It is like this in many spots. Photo of plug on engine side. There are pigtails. I think Gary has the Motorcraft connector catalog on site. Don't just go buy that connector! Most of them are insanely expensive through the dealers part counter. But once you have the actual part number you can cross it to suppliers like Pico Wiring or find old inventory on eBay. Link to comment Share on other sites More sharing options...
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