Gary Lewis Posted June 8, 2020 Share Posted June 8, 2020 Gary, is it possible to get pages 60 and 62 for the YY and ZZ wires for the fuel pump cutoff relay on both 85 and 86 years? Greg - I'm not sure what you are asking. Those pages are right here on the website. In the menu go to Documentation/Electrical/EVTM and then either the 1985 or 1986 EVTM and then the section on Electronic Engine Controls. Does this not work for you? Link to comment Share on other sites More sharing options...
Greg 85 Posted June 8, 2020 Author Share Posted June 8, 2020 Gary, is it possible to get pages 60 and 62 for the YY and ZZ wires for the fuel pump cutoff relay on both 85 and 86 years? Greg - I'm not sure what you are asking. Those pages are right here on the website. In the menu go to Documentation/Electrical/EVTM and then either the 1985 or 1986 EVTM and then the section on Electronic Engine Controls. Does this not work for you? Yes sir thank you. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted June 9, 2020 Share Posted June 9, 2020 Gary, is it possible to get pages 60 and 62 for the YY and ZZ wires for the fuel pump cutoff relay on both 85 and 86 years? Greg - I'm not sure what you are asking. Those pages are right here on the website. In the menu go to Documentation/Electrical/EVTM and then either the 1985 or 1986 EVTM and then the section on Electronic Engine Controls. Does this not work for you? Maybe Greg doesn't see it, just like me? And I've deleted cache in Chrome, and aii the rest. I don't see a reason to use Firefox or something else just to browse this site, when all my history/bookmarks/functionality revolves around it Link to comment Share on other sites More sharing options...
Gary Lewis Posted June 9, 2020 Share Posted June 9, 2020 Maybe Greg doesn't see it, just like me? And I've deleted cache in Chrome, and aii the rest. I don't see a reason to use Firefox or something else just to browse this site, when all my history/bookmarks/functionality revolves around it That's why I asked "Does this not work for you?" I'm still stumped by your problem. Link to comment Share on other sites More sharing options...
Greg 85 Posted June 9, 2020 Author Share Posted June 9, 2020 That's why I asked "Does this not work for you?" I'm still stumped by your problem. Gary, Page 62 of the 1985 EEC w/EFI 5.0 shows the fuel pump relay and the terminal junction in a triangle represented by (YY). That wire is the ground wire coming from Pin 22 from the ECA and is also the ground from the test port. I have reran the ground wire for the ECA to the back of the engine and am still loosing ground. Can I have your thoughts on using a 5 pin relay as an ignition activated ground switch supplying ground to this circuit if I were to add it. Do you think it would cause a back feed issue with the ECA or cause another issue in the system? Not being familiar with Ford electronics I can't call but really don't see that it would. What are your thoughts? Link to comment Share on other sites More sharing options...
Gary Lewis Posted June 9, 2020 Share Posted June 9, 2020 That's why I asked "Does this not work for you?" I'm still stumped by your problem. Gary, Page 62 of the 1985 EEC w/EFI 5.0 shows the fuel pump relay and the terminal junction in a triangle represented by (YY). That wire is the ground wire coming from Pin 22 from the ECA and is also the ground from the test port. I have reran the ground wire for the ECA to the back of the engine and am still loosing ground. Can I have your thoughts on using a 5 pin relay as an ignition activated ground switch supplying ground to this circuit if I were to add it. Do you think it would cause a back feed issue with the ECA or cause another issue in the system? Not being familiar with Ford electronics I can't call but really don't see that it would. What are your thoughts? Greg - I'm not sure what you mean by "loosing ground". Do you mean the whole ECA is loosing its ground? Or do you mean that the ECA is not grounding Ckt 97 as it should to bring in the fuel pump relay? Are you sure that the inertia switch is closed? If it is the latter then adding a relay to do that would work. However, whatever the original problem is will still be there. If it is just that the ECA's transistor to pull in the fuel pump relay is fried, then it may not be a problem. But if there's another problem there may be a problem. Link to comment Share on other sites More sharing options...
Greg 85 Posted June 9, 2020 Author Share Posted June 9, 2020 Greg - I'm not sure what you mean by "loosing ground". Do you mean the whole ECA is loosing its ground? Or do you mean that the ECA is not grounding Ckt 97 as it should to bring in the fuel pump relay? Are you sure that the inertia switch is closed? If it is the latter then adding a relay to do that would work. However, whatever the original problem is will still be there. If it is just that the ECA's transistor to pull in the fuel pump relay is fried, then it may not be a problem. But if there's another problem there may be a problem. Yes on the latter, CKT 97 supplies ground to the fuel pump relay from the ECA. I am loosing ground intermittently as tested from back probing the relay. I can add ground to it and it works as it should, I can remove it and sometimes it will continue to work and other times the ground disappears. Besides my timing being out of wack, which is something that will be addressed as soon as I figure this issue out, Nothing in the system that I know of is wrong other than loosing ground on CKT 97. Just reread your post, It is a brand new ECA, still having the same issue as before I changed the ECA. I am thinking something in the system is telling the ECA to cut ground on CKT 97 But after going through the diagnostics and wiring diagram, I can't seem to figure it out. So I know what is happening, just don't know why. I have used relays in the past for similar issues, but those were on no computer controlled and generally homemade setups on equipment. Link to comment Share on other sites More sharing options...
Gary Lewis Posted June 9, 2020 Share Posted June 9, 2020 Greg - I'm not sure what you mean by "loosing ground". Do you mean the whole ECA is loosing its ground? Or do you mean that the ECA is not grounding Ckt 97 as it should to bring in the fuel pump relay? Are you sure that the inertia switch is closed? If it is the latter then adding a relay to do that would work. However, whatever the original problem is will still be there. If it is just that the ECA's transistor to pull in the fuel pump relay is fried, then it may not be a problem. But if there's another problem there may be a problem. Yes on the latter, CKT 97 supplies ground to the fuel pump relay from the ECA. I am loosing ground intermittently as tested from back probing the relay. I can add ground to it and it works as it should, I can remove it and sometimes it will continue to work and other times the ground disappears. Besides my timing being out of wack, which is something that will be addressed as soon as I figure this issue out, Nothing in the system that I know of is wrong other than loosing ground on CKT 97. Just reread your post, It is a brand new ECA, still having the same issue as before I changed the ECA. I am thinking something in the system is telling the ECA to cut ground on CKT 97 But after going through the diagnostics and wiring diagram, I can't seem to figure it out. So I know what is happening, just don't know why. I have used relays in the past for similar issues, but those were on no computer controlled and generally homemade setups on equipment. If you are measuring at the fuel pump relay then there are several things it might be. It might be the inertia switch or the wiring to and from it. And if it is betwixt and between the STI and the FPR then adding the relay at the STI won't do it. Have you tried testing both the ECA and the fuel pump relay at the same time? In other words, placing a meter or a test light on pin 22 of the ECA and another on the FPR's coil ground? If when the ground goes away on the FPR the ECA still has a ground then there's a problem between. Link to comment Share on other sites More sharing options...
Greg 85 Posted June 9, 2020 Author Share Posted June 9, 2020 If you are measuring at the fuel pump relay then there are several things it might be. It might be the inertia switch or the wiring to and from it. And if it is betwixt and between the STI and the FPR then adding the relay at the STI won't do it. Have you tried testing both the ECA and the fuel pump relay at the same time? In other words, placing a meter or a test light on pin 22 of the ECA and another on the FPR's coil ground? If when the ground goes away on the FPR the ECA still has a ground then there's a problem between. So what I see is the inertia switch is on the Switch side of the relay and should not play a role in the coil side of the relay. I have not tested the ECA at Pin 22 since replacing the ECA but the old one was loosing Ground at Pin #22, hence the replacement of the ECA. After reviewing the schematics, there is nothing in the coil side of the FPR on either power supply (#86 on the relay) or the Ground side (#85 on the relay), Power is supplied from a junction at a 20A link and ground is supplied by the ECA. I was planning on installing the ground switch relay at pin #85 on the FPR. Link to comment Share on other sites More sharing options...
Gary Lewis Posted June 9, 2020 Share Posted June 9, 2020 If you are measuring at the fuel pump relay then there are several things it might be. It might be the inertia switch or the wiring to and from it. And if it is betwixt and between the STI and the FPR then adding the relay at the STI won't do it. Have you tried testing both the ECA and the fuel pump relay at the same time? In other words, placing a meter or a test light on pin 22 of the ECA and another on the FPR's coil ground? If when the ground goes away on the FPR the ECA still has a ground then there's a problem between. So what I see is the inertia switch is on the Switch side of the relay and should not play a role in the coil side of the relay. I have not tested the ECA at Pin 22 since replacing the ECA but the old one was loosing Ground at Pin #22, hence the replacement of the ECA. After reviewing the schematics, there is nothing in the coil side of the FPR on either power supply (#86 on the relay) or the Ground side (#85 on the relay), Power is supplied from a junction at a 20A link and ground is supplied by the ECA. I was planning on installing the ground switch relay at pin #85 on the FPR. You are absolutely right! The inertia switch isn't in the coil circuit. And if you were losing ground at the ECA then it wasn't a circuit problem. But, it wouldn't hurt to make sure this ECA is losing ground as well. And, if so that means something else is causing the problem - unless your new ECA is also bad. So, while the ground relay at the FPR would work, it would just be covering up the other problem. But at this point maybe you don't care? Link to comment Share on other sites More sharing options...
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