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Unread 10-08-2010, 01:41 AM   #1
littleturner76
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1984 CJ8 
 
Join Date: Feb 2009
Location: Wilmington, NC
Posts: 419
novice..... general question

Just trying to pick at my jeep!!!!! I am a learn as I go type person so I am going to ask this:
258, weber, nuttered.
It is hard to start after sitting overnight or any period of time, probably have to crank it for 60-90 seconds before it fires. My question is, does the fuel lines drain empty after sitting? the reason I ask is, I changed the fuel filter trying to diagnos other issues and it is bone dry, not even a drop of gas is left behind in the filter ir the lines connecting to it. Is this normal? "It dies everytime I let my foot of the gas so I am batting with a football anyway."

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1984 CJ8 Scrambler, 258, MC2100, daystar 1", 4" Skyjacker Soft Ride, 31X10.5 on stock wheels, raptor lined.
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Unread 10-08-2010, 06:03 AM   #2
JeePete
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1983 CJ7 
 
Join Date: Jul 2010
Location: North Andover, MA.
Posts: 209
Lil Turner

Mine did this as well. If you look, there should be two lines going in one side of the fuel filter. There's a return line and a feed line.

The return line should be rotated to the top (12 o'clock) to prevent the gas from draining back into the tank.

I did this and it helped a little, but still have to crank if it's been sitting.

BTW, try the "Search" feature. There's a ton of info on this subject.

Last edited by JeePete; 10-08-2010 at 06:22 AM.. Reason: text
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Unread 10-08-2010, 06:21 AM   #3
BioTex
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2006 TJ Wrangler 
 
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Replace all rubber lines with new. Even a pinhole leak will allow the gas to drain back to the tank. Double check all clamps. Make sure the return line is oriented at the 12:00 position. Fuel pumps can allow air into the system, and they also act as a check valve. A new pump can fix it, or not!
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Unread 10-08-2010, 07:54 AM   #4
scrapman
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1984 CJ7 
 
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Posts: 702
For the dying at stop signs:

First check the idles tubes to see if they are clogged.(Lots of info if you search)
Second if still dying, set vacuum gap and vacuum piston in carb.(FSM can be found on this site, page b-244)
While your at it, set the fuel float level, the accelerator pump, the choke, and your idle.
Then find your best lean idle using a vacuum gauge while adjusting the mixture screws.

If all of this doesn't solve your problem, chunk the carter for a motorcraft 2100!
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Unread 10-08-2010, 01:07 PM   #5
littleturner76
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1984 CJ8 
 
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Location: Wilmington, NC
Posts: 419
Quote:
Originally Posted by scrapman View Post

If all of this doesn't solve your problem, chunk the carter for a motorcraft 2100!
Its a weber. I have searched and read most of all the Weber write ups on the forum and I think I am just not "getting it". I did not know about the 12 O'clock position of the return line. Will try this. all the rubber hoses are new but the metal lines are still original but look to be in good shape. I do not have any fancy vacuum gauges nor would I know how to use them. I broke down about 45 minutes ago and dropped the Jeep off for the first time since I started my project for someone ealse to try and fix it. Wish him luck! I will let u know the damage, and if I am not back on here ever again it is because my wife does not know I took the jeep to a mechanic today.
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1984 CJ8 Scrambler, 258, MC2100, daystar 1", 4" Skyjacker Soft Ride, 31X10.5 on stock wheels, raptor lined.
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Unread 10-08-2010, 01:18 PM   #6
titomars
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1981 CJ7 
 
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Quote:
Originally Posted by littleturner76 View Post
Its a weber. I have searched and read most of all the Weber write ups on the forum and I think I am just not "getting it". I did not know about the 12 O'clock position of the return line. Will try this. all the rubber hoses are new but the metal lines are still original but look to be in good shape. I do not have any fancy vacuum gauges nor would I know how to use them. I broke down about 45 minutes ago and dropped the Jeep off for the first time since I started my project for someone ealse to try and fix it. Wish him luck! I will let u know the damage, and if I am not back on here ever again it is because my wife does not know I took the jeep to a mechanic today.
test your fuel pump i am assuming its a stock mechanical one. first get the engine warmed up. then make sure the carb is full of fuel. then disconnect the line before the filter. hook up a pressure gauge to the line from the pump. if the gauge has wild fluctuations at an idle or just off idle (0 to what ever) the internal check valves probably failed. while driving down the road this would not be too much a problem, but at idle and starting it would be just like you are describing.
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Unread 10-08-2010, 01:26 PM   #7
littleturner76
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Quote:
Originally Posted by titomars View Post
test your fuel pump i am assuming its a stock mechanical one. first get the engine warmed up. then make sure the carb is full of fuel. then disconnect the line before the filter. hook up a pressure gauge to the line from the pump. if the gauge has wild fluctuations at an idle or just off idle (0 to what ever) the internal check valves probably failed. while driving down the road this would not be too much a problem, but at idle and starting it would be just like you are describing.
no gauges here. the fuel pump is new. I actually took it back to the store and got a replacement saying it was malfunctioned, but it acted the same with either pump.
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1984 CJ8 Scrambler, 258, MC2100, daystar 1", 4" Skyjacker Soft Ride, 31X10.5 on stock wheels, raptor lined.
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