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post #1 of (permalink) Old 06-08-2004, 03:46 PM Thread Starter
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fuel pump

hi there

i'm trying to start my 258 in my 82 cj7 for the first time in 2 years...it's turning over and getting a spark. i don't think it's getting fuel...does this engine have an electric or mechanical fuel pump?

how can i test for sure if it's getting fuel?

by the way...i think i have the timing close now.

thanks
patrick
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post #2 of (permalink) Old 06-08-2004, 06:49 PM
 
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Re: fuel pump

</font><blockquote><font class="small">In reply to:</font><hr />
does this engine have an electric or mechanical fuel pump?


[/ QUOTE ]

Mechanical, unless someone installed an electric.

</font><blockquote><font class="small">In reply to:</font><hr />
how can i test for sure if it's getting fuel?


[/ QUOTE ]

Well if you are very careful you can dissconnect the fuel line where it goes into the carb and place the end of the line in a can or 2 liter bottle, (have some one) crank the motor over a few times while you hold the fuel line. get fuel:: No problem

no fuel: check filter.


Next if you have fuel you may want to check to make sure the needle ans seat in the bowl of the carb may be stuck closed. This will keep fuel from entering the bowl.

You will have to pull the top of the carb to check this.

The key word here is to be very careful and NOT creat a spark while you have open gas fumes under the hood.
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post #3 of (permalink) Old 06-08-2004, 06:50 PM
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Re: fuel pump

Unless someone pulled a fast one on you it should be mechanical. Passenger side in front of motor mount and low down. Follow your fuel line from the carb backwards. You can pull the fuel line from your carb and stick it in a small jar or glass and turn your engine over several times. It should pump fuel out of the line into the jar. PULL YOUR COIL WIRE FIRST. You don't need the motor to fire with the gas out in the open like that. Especially since it was backfiring.
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post #4 of (permalink) Old 06-08-2004, 06:53 PM
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Re: fuel pump

Hey GP'n. Looks like you answered while I was typing. Yours is much more detailed, so I hope he goes by your reply.
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post #5 of (permalink) Old 06-08-2004, 07:26 PM
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Re: fuel pump

[img]images/graemlins/goodpost.gif[/img]

GP'n great reply but.....

</font><blockquote><font class="small">In reply to:</font><hr />
The key word here is to be very careful and NOT creat a spark while you have open gas fumes under the hood.


[/ QUOTE ]

Where's the challenge.... what fun is that.... heck light up and smoke... it's all fun (putting out the fire).

Teasing but don't think that I haven't gone off on a rant because someone lit up while I was doing something like that.

Good Luck from a long time smoker,

Dale
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post #6 of (permalink) Old 06-12-2004, 03:12 PM Thread Starter
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Re: fuel pump

hi there

well, i finally got some time to check for fuel...and there is none coming out before or after the filter.

so here's my thought...i had originally only put in a gallon-ish of gas in a bone dry tank. i'm thinking maybe i need more gas for the fuel pickup in the tank to get going.

anybody think that may do the trick?

any other idea of what to try when that doesn't work? do i have to prime the pump somehow?

at what point do i decide the pump is bad and buy a new fuel pump?

i just went to q-tec to check the price of a new pump. in all their pictures it looks upside down to how mine is mounted...anybody got a picture or good description of which side of the fuel pump should be up?


thanks
patrick
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post #7 of (permalink) Old 06-12-2004, 03:40 PM
 
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Re: fuel pump

The pick up might not be covered is 1 thought. A way to test that would be to take your fuel line before the pump and put it in a gas can and see if the motor will run. If it does your pick up isn't picking up fuel.
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post #8 of (permalink) Old 06-12-2004, 03:40 PM
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Re: fuel pump

</font><blockquote><font class="small">In reply to:</font><hr />
so here's my thought...i had originally only put in a gallon-ish of gas in a bone dry tank. i'm thinking maybe i need more gas for the fuel pickup in the tank to get going.

anybody think that may do the trick?

[/ QUOTE ]

If it was completely empty it just might take more than 1 gallon to be over the pickup.

</font><blockquote><font class="small">In reply to:</font><hr />
at what point do i decide the pump is bad and buy a new fuel pump?

[/ QUOTE ]

When you are sure there is gas at the pickup in the tank and you still can't get gas to the filter.

</font><blockquote><font class="small">In reply to:</font><hr />
i just went to q-tec to check the price of a new pump. in all their pictures it looks upside down to how mine is mounted...anybody got a picture or good description of which side of the fuel pump should be up?

[/ QUOTE ]

Passenger Side, below and behind the alternator. Looks like this:



Auto Zone PN# 6737 for $14.99

I just put that pump on there a few weeks ago, wonder how it got all muddy?? [img]images/graemlins/grin.gif[/img]

Good Luck,

Dale
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