« previous next »
Pages: 1 2 3 [4]   Go Down

Author Topic: won't turn over??!  (Read 24140 times)

Offline 2502

  • Frequent Member
  • **
  • Posts: 331
Re: won't turn over??!
« Reply #45 on: November 14, 2011, 01:11:25 pm »
Quote from: thirsty on November 14, 2011, 11:28:53 am
Quote from: VileZambonie on November 12, 2011, 07:27:54 pm
Thirsty,

The oil pressure switch doesn't shut down the fuel pump, it enables it. In the event that the fuel pump relay fails, the oil pressure switch would provide a back feed to the fuel pump. So what you'd get is an extended crank but it would still run. You probably had a problem with the fuel pump circuit. Many people think the oil pressure was a protective series circuit but it wasn't. You could drain the oil and it should still start and run.

I stand corrected.
Years ago I was told that the oil pressure switch would shut the pump down to protect the motor by someone that I thought I could believe. I was sold on the theory without ever looking into it, even more so when adding oil to that 90' chevy made it stay running.

The best part of this forum is that you get tons of advise and people like Vile will take the time to explain things to everybody when advise is not accurate for your situation.
definitely.

my issue is i'm trapped at home, everyone i know works some ridiculous schedule so trying to find a ride is a real pain and i have to be in the gym for a set time during the days so i'm like... stuck. luckily the gym is across the street from my house so...


i dont have the tools to check the fuel pressure so i'm gonna trty to get a ride up to auto zone or something sinc ei know they do loner tools
Logged

Offline Irish_Alley

  • Tim
  • Senior Member
  • ****
  • Posts: 13333
  • Family is not an important thing. It's everything.
Re: won't turn over??!
« Reply #46 on: November 14, 2011, 11:50:31 pm »
yeah and then they wont say "well only one of the things you stated is correct" ::)
Logged
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline 2502

  • Frequent Member
  • **
  • Posts: 331
Re: won't turn over??!
« Reply #47 on: November 27, 2011, 05:03:08 pm »
truck is running. bit rough, i cussed at it and threw my helmet at the truck after i posted last. seems like it could use new plugs and wires which i'll prob do this week when i get paid. it started up magically after not wanting to for 2 weeks. i'm not complaining. it's running, so i guess a tuneup is in order now??!
Logged

Offline Irish_Alley

  • Tim
  • Senior Member
  • ****
  • Posts: 13333
  • Family is not an important thing. It's everything.
Re: won't turn over??!
« Reply #48 on: November 28, 2011, 05:03:09 pm »
Not to thread hijack but my 94 is almost doing the same thing was running fine before I went into the store now when I started it up it ran very low rpms for about 5 sec. The dies now nothing. I can hear the injectors click but don't hear the pump. Check fuel pump fuse its good. Tried the relay but don't have anything to replace it with so I tapped it with a pair of cuffs. Don't have any tools lol but didn't do anything. So I went to dollar tree and looked for starting fluid or wd40 they didn't have neither so I got some injector cleaner and dumped it into the TB started up till that ran dry then died.
Logged
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline 1978 454 Big 10

  • Registered Users
  • *
  • Posts: 101
  • Don't Mess With Texas! :)
Re: won't turn over??!
« Reply #49 on: November 28, 2011, 05:26:32 pm »
Fuel Pump. Have someone turn the key to the on position while you hit on the tank.

Sometimes that works, short term.
Logged
1978 Chevy C-10 Silverado "Big 10" 454, 400 turbo, PW, PDL, Tilt, Cruise, AM/FM, Factory Tach, Dual Tanks, Locking Diff, Sliding Rear Window, Trans Cooler, Cordova Brown/Santa Fe Tan. 052,600 Original miles!

Offline VileZambonie

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 19178
Re: won't turn over??!
« Reply #50 on: November 28, 2011, 06:01:31 pm »
Quote from: Irish_Alley on November 28, 2011, 05:03:09 pm
Not to thread hijack but my 94 is almost doing the same thing was running fine before I went into the store now when I started it up it ran very low rpms for about 5 sec. The dies now nothing. I can hear the injectors click but don't hear the pump. Check fuel pump fuse its good. Tried the relay but don't have anything to replace it with so I tapped it with a pair of cuffs. Don't have any tools lol but didn't do anything. So I went to dollar tree and looked for starting fluid or wd40 they didn't have neither so I got some injector cleaner and dumped it into the TB started up till that ran dry then died.

Smack the gas tank with a hammer a few times.
Logged
,                           ___ 
                         /  _ _ _\_
              ⌠¯¯¯¯¯'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Irish_Alley

  • Tim
  • Senior Member
  • ****
  • Posts: 13333
  • Family is not an important thing. It's everything.
Re: won't turn over??!
« Reply #51 on: November 28, 2011, 11:56:11 pm »
well had it loaded up shortly after posting. went back to my buddys house attempted to get the truck off the trailer we dont this many times before but this was a different trailer not the one we built and the dang truck falls off the ramp and they have a bolt on the side of the ramp to lock it upright well the rear tire hit that putting a small but leaking gash in the tire it goes flat as soon as the front tire are off the ramp. im really ticked off at this point but all i can do is laugh at it and then we all start pointing fingers at whos fault it was lol but anyway bang on the tank turn the key on to hear the pump prim up, was happy then. so then i tried to start it and nothing was ticked again so i hit the tank a couple more times and tried to start it, she starts like nothing was ever wrong except for the flat tire lol. so does this mean the pump is shot eclectically or it sucked up some crap and that ruined it or the couple hours it sat the pump cooled down ?
Logged
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline 1978 454 Big 10

  • Registered Users
  • *
  • Posts: 101
  • Don't Mess With Texas! :)
Re: won't turn over??!
« Reply #52 on: November 29, 2011, 12:14:09 am »
Time for a new pump!
Logged
1978 Chevy C-10 Silverado "Big 10" 454, 400 turbo, PW, PDL, Tilt, Cruise, AM/FM, Factory Tach, Dual Tanks, Locking Diff, Sliding Rear Window, Trans Cooler, Cordova Brown/Santa Fe Tan. 052,600 Original miles!

Offline Irish_Alley

  • Tim
  • Senior Member
  • ****
  • Posts: 13333
  • Family is not an important thing. It's everything.
Re: won't turn over??!
« Reply #53 on: November 29, 2011, 06:05:48 am »
lol this is known but just want to know why it failed
Logged
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline VileZambonie

  • Global Moderator
  • Senior Member
  • *****
  • Posts: 19178
Re: won't turn over??!
« Reply #54 on: November 30, 2011, 09:43:51 pm »
To really know why it failed you will need an oscilloscope and an amp clamp. Got one?  ;)
Logged
,                           ___ 
                         /  _ _ _\_
              ⌠¯¯¯¯¯'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Irish_Alley

  • Tim
  • Senior Member
  • ****
  • Posts: 13333
  • Family is not an important thing. It's everything.
Re: won't turn over??!
« Reply #55 on: December 01, 2011, 11:08:44 am »
um lol got one but not both
Logged
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes
Pages: 1 2 3 [4]   Go Up
« previous next »