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 Post subject: new problem, same truck
PostPosted: Tue Jan 12, 2010 8:01 pm 
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Joined: Wed Dec 02, 2009 9:04 pm
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Location: ft. irwin, california
'76 luv, bone stock. turns over, starts, runs. by no means does it run well though. it spits and sputters continuously. i made it from one side of our parking lot to the other. our parking lot is maybe at the most 100 yards long.it might be the fuel pump but im not exactly sure. any ideas?

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PostPosted: Thu Jan 14, 2010 8:58 pm 
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Check the window on the front of the float bowl on the carb. It should show it about half full. I am convinced the float valve is the cause of no end of problems. It can stick either open or closed.


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PostPosted: Fri Jan 15, 2010 8:54 am 
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Location: ft. irwin, california
i will definately do that. i had a similar problem before when my luv wouldnt start and i checked that and it was fine. it ended up being a fuse but i will look at the float again. any way to fix it if it is the float?

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PostPosted: Fri Jan 15, 2010 10:34 am 
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Location: ft. irwin, california
checked it out. float is fine. sits about midle and bobbles when i shake the truck. any other ideas?

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PostPosted: Fri Jan 15, 2010 10:51 am 
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Location: Boise, Idaho
did you check the gas flow? get a bucket, detach the fuel line from the carb and have someone turn the key to start, weak flow or garden hose?
if you have good flow and your float isnt sticking it might just need a good carb cleaning?


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PostPosted: Fri Jan 15, 2010 10:56 am 
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Location: Boise, Idaho
also it could be timing...
viewtopic.php?f=5&t=21499&p=159300&hilit=timing#p159300


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PostPosted: Fri Jan 15, 2010 8:17 pm 
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Location: ft. irwin, california
sweet man. thanks. ill try to get out there tommorow after work if its not too dark and try both of those. ill try timing first cuz i dont exactly have a bucket laying around and i have to do everything in a barracks parking lot. haha. but ill see what i can do on saturday and sundy. ill keep updating with what i find.

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PostPosted: Sat Jan 16, 2010 1:54 am 
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Joined: Thu Jun 18, 2009 7:24 pm
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Location: tucson,az
jay, check the points they might need adjusting.... uncle


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PostPosted: Sat Jan 16, 2010 9:46 am 
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Points, timing, fuel flow have all been suggested, also check to make sure your choke isn't sticking.

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PostPosted: Sat Jan 16, 2010 5:47 pm 
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Location: Sturgis, SD
Does it idle smooth or poorly? If you rev it and hold it at a steady rpm how does it sound? Does it respond quick on pedal stab or does it hesitate? Any smoke? If it was my truck Id pull my spark plugs and look at their color/condition. Id probably pull each plug wire off with it idling to see if it made a difference. lol had a guy put diesel in our work trucks once. May be bad gas. no lol had a guy put gas in a diesel once too. Youve got fuel and spark. So its probably a problem with either timing, fuel air mixture, weak spark or poor fuel. Start with easy and cheap and narrow it down, thats what I would do anyway. You'll find it!

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PostPosted: Sat Jan 16, 2010 8:55 pm 
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Location: ft. irwin, california
talked to a buddy today and he told me to do everything you guys are saying to do. im gonna try and get on it tommorow. oh and another piece of advice he gave me......... consult the internet. hahahahaha. what a kawinkadink. lol. thanks for all the help. ill keep posting as i figure stuff out.

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PostPosted: Sun Jan 17, 2010 6:21 pm 
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Location: ft. irwin, california
ok so i didnt even have a chance to look at my truck today. went to primm last night and stayed there. tommorow i have staff duty so i wont be able to do anything but on tuesday ill be able to look at it for sure.

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PostPosted: Sun Jan 17, 2010 8:03 pm 
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Location: GA
Be sure you check all vacumm lines, and check if there's any air bubbles in the fuel.


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PostPosted: Fri Jan 22, 2010 12:20 pm 
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Location: ft. irwin, california
havent had a computer the last few days so i have been able to post, but i went down on tuesday and checked it out and one of my sparkplus wires is grounding out so there was one problem. i didnt get a chance to check out the other ones cuz it started raining and im working in an open parking lot. i had a few problems arise in the last few days and its been raining pretty bad so i havent had a chance to really get out there and work on it. but i will be replacing my plugs and wires with my next paycheck and see how that works out for me. and in the meantime i will be trying to figure out the problems with it as long as the weather holds out.

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PostPosted: Sun Jan 31, 2010 1:36 pm 
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Location: ft. irwin, california
alright guys. i hate to say it but im getting rid of my luv. *sad face* i just dont have the time or the money to keep it up and running. i gotta get something newer with less maintenance. good news though is that im stayin in the family. i plan on getting a 99 to 02 s-10. :-)when i say i dont have the time its because for 2 weeks outta the month im in the field training other U.S. soldiers to prepare to deploy and the rest of the month im working from 630 am to between 5 and 730 pm. hours suck so i have no choice but to get rid of it.

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PostPosted: Sun Jan 31, 2010 9:27 pm 
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Location: porterville,cali
what you going to ask for it

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PostPosted: Mon Feb 01, 2010 11:02 pm 
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Location: hopkinsville ky
:signimsorry :signimsorry how much$$ :ebiggrin

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PostPosted: Tue Feb 02, 2010 3:06 pm 
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Location: ft. irwin, california
haha. im sorry guys but its going back to my grandpa who is either gonna sell it to a family friend of ours named heithy or my uncle who also posts on here. if you guys really want it i can talk to him about it and see what he wants to do with it but its on you. ill see him tommorow when i give him the truck so just let me know before then and ill talk to him. oh and he lives in tucson, az. ill be checkin g on here later for anything posted. other than that it has been a good time talking to everyone and learning new thrings about old engines. :ebiggrin thankyou for everything guys. ill probably be checkin in in some of the other sections of here every once in a while when i get the s-10. have a few plans that are gonna take a while but ill try to keep it up to date.

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PostPosted: Tue Feb 02, 2010 5:04 pm 
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Location: So Cal
My truck I just bought sat for 10 years got it for good price but it ran bad, would sputter, spit back fire and when it ran cold it would do @60mph. Then it warmed up it did @20mph or less. Everytime I would replace some thing it would run great and then it would act up again. Truck has over 100,000 miles on it. Reading many threads through the search on this site and it helped a lot. Here are some of the problems I had-

Top 10 list why my truck ran bad:

1.Bad Carb Replaced it with a Weber 38 DGES
2.Bad front brake calipers sticking-Replaced
3.Bad Fuel pump, worked but not enough pressure when driving. Replaced with a Mr Gasket blue pump rated 4-6lbs.
4.Too much fuel pressure. A regulator was in order, but a fuel pump cost just as much so I went with new Mr Gasket red pump instead. It was rated 2-3lbs which is required for a Weber per their instruction sheet.
5.Bad ballast resistor- Used an MSD 6AL to eliminate the ballast resistor
6.Bad points-burnt- Used MSD 6Al, it runs low voltage to the points so even if points are bad, as long as they make a signal to the MSD they work just fine. Eventually replace points, had a set of points in another truck that had a short in them, so I put new points in this truck and used points in that one that I don't drive often.
7.No mech advance in dist.-Took dist apart, Previous owner put SBC springs in mech adv. Springs to strong, adv didn't kick in till really high rpms. Replaced them with Mr. Gasket curve kit springs using med to lite springs.
8.No vacuum adv-Took the vacuum adv plate off. I was froze up with rust so I cleaned it with carb and brake cleaner, wd-40 and then pack the bearings with grease just like I would pack front wheel bearings.
8.Coil wire bad and a dead spark plug wire. Due to the MSD it ran on all cylinders but it had a miss and a back fire in the exhaust on deceleration, and vacuum showed poor vacuum. Was told the truck had new spark plug wires and cap and rotor. Friend of mine checked the wire and the wires had a lot of resistance and one was non existent, dead. The coil wire had so much resistance it was close to being dead. Replaced wires.
Truck started running 90mph. But ran bad at lower speed until the spark plug wires were changed.
9.Compression test showed all cylinders in good shape, check timing according to spec's. Timing good. Adv.good.
10.Blew a tire at @85mph after visiting Figueras and buying some parts. Luckly got some rims with tires and used one of them to get back on the road. Replaced tires with new BFG'S

Truck runs great and gets great mileage. Need to rejet, runs a little rich. Will do that next.
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PostPosted: Tue Feb 02, 2010 7:32 pm 
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Location: ft. irwin, california
i wish i had gotten this list a month and a half ago. haha. maybe i would have a good running little trucl. its alright though i need something that can take the 340 miles one way trips every month to and from home back to post. but you have a really clean luv. is it a long bed? and it is actually the exact same color as mine.

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