Ryan Nunez
Registered User
Hey all, I'm sorry in advance for making another one of these threads but I can't seem to piece other ones together to solve my issue(s). I recently bought a 93 f250 7.3 idi NA and it runs extremely well. The problem is that I now can't get it to start. It was running when I got to the guys house to look at it and at one point I shut it off and when I went to leave with it after it had been sitting for roughly half an hour, it would not start. The guy said that he knew it was pretty low on fuel (gauge is broke) and with the way the truck was sitting it might not be getting fuel. I bump started it (in reverse no less) and it fired instantly and ran great to the gas station and fired up fairly quickly after I filled it up.
Fast forward to the next day when I wanted to move it to start doing work on it and it would crank and not start. It did start after I had it plugged in overnight and hooked up to my van with jumper cables. Ran pretty rough for a few minutes then leveled out and ran fine. Parked it for an hour and it started up no problem. Now I'm having the same problem with it not starting again the next day. I checked fuel at all 8 injectors and at the shrader valve. I had both batteries tested that resulted in ~12.5v and 850 CCA. My FSS clicks like it should when I remove power with the key on.
I tested the resistance to the negative of all 8 plugs, 6 of them were 1ohm and 2 were 2ohms. I am assuming the 2 that tested higher are bad. The guy I bought it off of said he changed the glow plug relay and the glow plugs (Autolite... I know...). The relay holds as designed for 4-5 seconds and then when the WTS light goes out you can hear the relay clicking and I'm assuming it is because of the two bad plugs. I did wire in a manual switch for the glow plugs as suggested on other threads on this site and even with the extra time, it still won't start however I did not have it plugged in last night.
Are these two glow plugs enough to stop the truck from starting on a 50 degree day? Is there something that I am missing? Any help would be greatly appreciated. I have had multiple diesels in the past but this is my first IDI.
Fast forward to the next day when I wanted to move it to start doing work on it and it would crank and not start. It did start after I had it plugged in overnight and hooked up to my van with jumper cables. Ran pretty rough for a few minutes then leveled out and ran fine. Parked it for an hour and it started up no problem. Now I'm having the same problem with it not starting again the next day. I checked fuel at all 8 injectors and at the shrader valve. I had both batteries tested that resulted in ~12.5v and 850 CCA. My FSS clicks like it should when I remove power with the key on.
I tested the resistance to the negative of all 8 plugs, 6 of them were 1ohm and 2 were 2ohms. I am assuming the 2 that tested higher are bad. The guy I bought it off of said he changed the glow plug relay and the glow plugs (Autolite... I know...). The relay holds as designed for 4-5 seconds and then when the WTS light goes out you can hear the relay clicking and I'm assuming it is because of the two bad plugs. I did wire in a manual switch for the glow plugs as suggested on other threads on this site and even with the extra time, it still won't start however I did not have it plugged in last night.
Are these two glow plugs enough to stop the truck from starting on a 50 degree day? Is there something that I am missing? Any help would be greatly appreciated. I have had multiple diesels in the past but this is my first IDI.