Low compression no start, need fix ASAP!
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New User
Joined: Apr 2009
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Low compression no start, need fix ASAP!
hey folks, i went off to basic training for 3 months with the military and like the idiot i am i forgot to ask any of my familly to go out and start my 96 F-250 XLT HD 7.3PSD. no she has no compression and wont start. i tried liquid fire eether and got it to kick over a couple times but no start. I am being posted accross the country and they are coming to pick the truck up in 2 days and i need it running. any ideas for a quick fix? im almost possitive thats its just the rings dried out but any ideas? thanks alot i need some help fast on this one guys.
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
hey folks, i went off to basic training for 3 months with the military and like the idiot i am i forgot to ask any of my familly to go out and start my 96 F-250 XLT HD 7.3PSD. no she has no compression and wont start. i tried liquid fire eether and got it to kick over a couple times but no start. I am being posted accross the country and they are coming to pick the truck up in 2 days and i need it running. any ideas for a quick fix? im almost possitive thats its just the rings dried out but any ideas? thanks alot i need some help fast on this one guys.
Something else is wrong .Like said , charge the batteries well ...
Cargo Master
Joined: Feb 2010
Posts: 2,526
Likes: 6
From: College Station, TX
Check the starter. Apply parking brake. Put your truck in park(auto) neutral(manual). Turn your key to the on position. Take you a screwdriver with a solid handle. Touch it to the bottom of one starter solenoid post and rotate it until it contacts the other. If it starts then you should know that the starter is bad. At least that's how I diagnosed mine. Had trouble starting and sometimes wouldn't. Did that, swapped starter, and no mo trouble. Just take care to not ground out on anything. Only touch the starter posts.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Stop using ether or you will end up with a compression problem.
Let's start at the beginning. Are the batteries charged? Have you checked the fuses with a test light? Does the WTS light come on and go off like normal? Is there any smoke coming out the tail pipe while cranking? Fuel level good? Fuel in the filter bowl? Engine oil full? HPOP reservoir full? Does the tach bounce while cranking? Any mice been having lunch on the wiring under the hood?
Let's start at the beginning. Are the batteries charged? Have you checked the fuses with a test light? Does the WTS light come on and go off like normal? Is there any smoke coming out the tail pipe while cranking? Fuel level good? Fuel in the filter bowl? Engine oil full? HPOP reservoir full? Does the tach bounce while cranking? Any mice been having lunch on the wiring under the hood?
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Joined: Apr 2009
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yes i had 11.1 volts on the batteries when i started, the wts light comes on but goes out to soon, i have a quarter tank of fuel, just toped up the oil, until the eether i didnt see any smoke coming out of the tailpipe but it was just me and i didnt notice, no mice and i dont recall if the tach bounces. it ran and started like a champ and now 4.5 months later the starter is turning over the engine it really looks and feels like low compression due to lack of oil to the rings, but i could be very wrong. i'll check the tach and such tonight but does that help? i'm going to hook up my ranger to it to help with battery power next time
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Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
The only time oil on the rings means anything is if you drop some oil down into the cylinder while doing a compression test. If you fail a compression test, but a few drops of oil help the numbers, then it's the rings.
Was the 11.1 volt reading taken while sitting, or while cranking? If voltage drops too low while cranking (sometimes as little as 10.5volts), then the IDM will not fire the injectors so you won't get any smoke out the tail pipe and the truck won't start.
Ignore the compression thought for now. You're military now, have you been taught KISS? (keep it simple stupid). What about fuses and HPOP reservoir?
Was the 11.1 volt reading taken while sitting, or while cranking? If voltage drops too low while cranking (sometimes as little as 10.5volts), then the IDM will not fire the injectors so you won't get any smoke out the tail pipe and the truck won't start.
Ignore the compression thought for now. You're military now, have you been taught KISS? (keep it simple stupid). What about fuses and HPOP reservoir?
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Cargo Master
Joined: Feb 2010
Posts: 2,526
Likes: 6
From: College Station, TX
I'm gonna have to go with F350-6 all the way on this one. Even if you think that you're sure that you know that it maybe could probably be a major problem just start at the easiest simplest things first. You want to troubleshoot your problem not give yourself trouble. Start small and follow the trail to the problem. I find a weird correlation between trucks and medicine. NO MATTER WHAT the problem presents as we start at the A,B,C's - airway, breathing, & circulation. This is just advice to try and save you a larger headache and if it ends up being what you initially thought then you may hand slap me and laugh. Good luck bud and thank you for serving.
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