Throttle position during start
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Throttle position during start
OK already said I was new to diesel but simple questions get faster answers. I just got my O-rings for return lines and know I will have to crank over engine to get air out of line's.
My question is will it make it faster to hold the throttle all the way open or full throttle?
Even after I get the air out and trying to start truck what should I do with the throttle or Fuel peddle? Trying my best not to call it a gas peddle!!!!!
My question is will it make it faster to hold the throttle all the way open or full throttle?
Even after I get the air out and trying to start truck what should I do with the throttle or Fuel peddle? Trying my best not to call it a gas peddle!!!!!
Clueless spectator!
Joined: Aug 2010
Posts: 1,587
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From: Denver, CO
Hey Joe,
Don't feel bad about asking, it is a good question. Unless you have an electric fuel pump, it won't help much to hold the throttle open. The best way to bleed the air from the lines is to crack all 8 injector lines, and have someone crank her until you can see diesel fuel coming from the lines. Then crank them back down and she should fire pretty quickly. It might run a little rough for a bit, but that will settle after you purge the rest of the air in the lines. If all you did was return lines, you should still have fuel in your injector lines, so it might not be too hard to start without bleeding it though.
Good luck,
Mac.
Don't feel bad about asking, it is a good question. Unless you have an electric fuel pump, it won't help much to hold the throttle open. The best way to bleed the air from the lines is to crack all 8 injector lines, and have someone crank her until you can see diesel fuel coming from the lines. Then crank them back down and she should fire pretty quickly. It might run a little rough for a bit, but that will settle after you purge the rest of the air in the lines. If all you did was return lines, you should still have fuel in your injector lines, so it might not be too hard to start without bleeding it though.
Good luck,
Mac.
Lead Driver
Joined: Apr 2008
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While all 8 probably helps, you can do just 2 or 3 that are easy to get to and it will still get the air out just fine. As far as position when starting, i give it half when cold and full when its real cold (visor should have a sticker saying as much)
Posting Guru
Joined: Dec 2012
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From: western washington
when trying to start her back up, I hold 1/2 throttle, and turn it over no more than 10 seconds. then wait for starter to cool, or you will cook and kill the starter. ten minutes and keep a charger on the batts .to
Postmaster
Joined: Mar 2013
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From: Over There
Full throttle while clearing the air out can only help.
I used to do what the visor said(half throttle), and when I did it was hard to start. I think the large amount of fuel took too much heat to ignite. So now I start it at idle and it starts right up first time every time.
I used to do what the visor said(half throttle), and when I did it was hard to start. I think the large amount of fuel took too much heat to ignite. So now I start it at idle and it starts right up first time every time.
Lead Driver
Joined: Feb 2002
Posts: 7,969
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From: Greater Austin, Texas
If you are gonna start it at "idle", be sure to press down one time and release while the glow plugs are heating to set the cold idle solenoid. Mine seems to start best this way as well.
Fleet Owner
Joined: Jul 2006
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From: Mi'kma'ki
iv tried them all.i press to the floor while the gp's are glowing as stated,this sets the high idle solenoid and the only thing half throttle or full throttle does is makes me have to release my foot real quick so the engine doesn't rev when it fires.it never makes any difference in crank to fire speed vs no throttle.for some odd reason i keep testing it from time to time for kicks lmao but it's never made any difference.always an instant start either way.
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Clueless spectator!
Joined: Aug 2010
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From: Denver, CO
^^^X2
Both my trucks will fire in 2 or 3 seconds with no throttle at all. if it is below 40 or so, I set the fast idle but never give them any throttle while starting and they start and idle readily.
Both my trucks will fire in 2 or 3 seconds with no throttle at all. if it is below 40 or so, I set the fast idle but never give them any throttle while starting and they start and idle readily.
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Well got O-rings on my 2 worst injectors and the rest are dry. Ran the batteries dead trying to get it to start. again truck has been sitting for 2 years and the batteries just will not hold a charge. But what cranking I did do shows no leaks at new seals. Anyone know any tricks to help with old batteries?? put some new acid in them and charged but will not hold over night. this will be a hay truck on farm and do not want to put to much money into it.
As far as holding throttle position never new to look at visor for instructions but sounds like set cold idle selonoide with full pump to floor and start at idle position. all with gp's on. The previous owner put in a manual switch for the gp's does the cold start selenoide come from the gp's wire harness after the main relay??
As far as holding throttle position never new to look at visor for instructions but sounds like set cold idle selonoide with full pump to floor and start at idle position. all with gp's on. The previous owner put in a manual switch for the gp's does the cold start selenoide come from the gp's wire harness after the main relay??
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