Baxter
Registered User
About my 1993 7.3 idi w/turbo ...Well, I thought I could use the block heater to bypass glow plug system. I'll try to be a brief as possible here to explain ... first time using it ..Plugged in block heater for about 2-3 hrs. on a relatively warm 60 degrees F evening... I could hear the buzzing noise and it heated up the engine bay pretty good, engine block was warm to the touch... Wasn't enough to start the truck. >> Fast forward to I installed the CDD manual glow plug switch wiring kit. Thing is awesome and well put together. (Should mention I basically just cut all wires going to the stock gp controller/relay unit.) Tested glow plugs beforehand and they appeared good showing about .4 - .5 on the meter. Got in truck held the button for about 8-10 sec. ... nothing .... just cranking and cranking. paused for starter ... throttle pedal to the floor ... cranking cranking... nothing. Same as before. Several months ago when I had the hard cold start issue I was able to get it fired up after many trys and plenty of throttle. Truck would then run perfectly smooth and strong. Did this maybe on 8-10 different days and drove the truck as normal. Could park truck for 3-4 hours and she would fire right up quick, as it was still slightly warm. Overnight parking and nothing again! When I was able to get the truck started cold there would be a bunch of white smoke coming out the exhaust stack before it fired up as I cranked, ...unburnt fuel right?
Now there is nothing flowing out the exhaust at all while I'm cranking the engine. Does that mean I have no fuel delivery and that's why it's not starting? Did my lift pump go bad in the process? I don't suspect the IP just because the truck runs killer when it does start. Pulled one injector that was leaking at the cap to inspect it and replaced o-rings and cap... put the injector back in and left the hard line off the top and the return line hose off.. got in truck and tried to start it as normal, a friend was looking to see if fuel was flowing out and saw that it was pumping out the return line hose but not down from the hard line from the IP... I'm at a loss and I know it's something simple, or at least I hope!!
Now there is nothing flowing out the exhaust at all while I'm cranking the engine. Does that mean I have no fuel delivery and that's why it's not starting? Did my lift pump go bad in the process? I don't suspect the IP just because the truck runs killer when it does start. Pulled one injector that was leaking at the cap to inspect it and replaced o-rings and cap... put the injector back in and left the hard line off the top and the return line hose off.. got in truck and tried to start it as normal, a friend was looking to see if fuel was flowing out and saw that it was pumping out the return line hose but not down from the hard line from the IP... I'm at a loss and I know it's something simple, or at least I hope!!