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Old 01-10-2010, 01:24 AM   #1
NONHOG
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Need fuel : 235 question

my 54 235 thats in my 49 GMC Panel will run. I have a witness (Sillyoldman)
Silly and I got it to run for a bit till it emtied the bowl.
The funny thing is it has a new fuel pump that seems to pump (by hand)
But its not getting up the line and to the carb.
Maybe a bad one ,not enough pressure ?
Ideas ?
Also it has a car pump instead of a truck pump, differance ?
thanks in advance
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Old 01-10-2010, 01:49 AM   #2
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Re: Need fuel : 235 question

The first pic shows the black soot from when it was RUNNING !
pump pics shows new pump and old pump arm difference.
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Old 01-10-2010, 02:40 AM   #3
CAL 58 GMC
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Re: Need fuel : 235 question

You might be vapor locking. It happen to me several time and I went to a high pressure electric pump and the problem went away.

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Old 01-10-2010, 12:35 PM   #4
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Re: Need fuel : 235 question

The fuel never made it up to the filter bowl. Nonhog primed everything then we filled the carb & filter bowl. It ran great until it starved out. The pump runs off lobe. I'm guessing the lobe is not pushing the pump arm enough to function. Anyone know if that motor had two differend lobe sizes or fuel pumps? Side by side the new & original appear to be a good match. Help?
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Old 01-10-2010, 12:51 PM   #5
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Re: Need fuel : 235 question

This is from the shop manual for a '55 chevy pickup with a 235 (same pump). These are instructions for reassembling the fuel pump. Check out number six...

http://chevy.oldcarmanualproject.com...5ctsm06m32.htm



Here's the beginning of the section on the fuel pump. Keep clicking "next page" at the bottom to go through the entire fuel pump section in the manual...

http://chevy.oldcarmanualproject.com...5ctsm06m29.htm




And not for nothing, but it took three fuel pumps from Napa before I got a good one. Where's yours from?
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Old 01-10-2010, 01:05 PM   #6
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Re: Need fuel : 235 question

Maybe I should not install it upside down ? Maybe that would help.
Thats what I get for working in the dark.
Hope thats it !
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Old 01-10-2010, 01:13 PM   #7
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Re: Need fuel : 235 question

Quote:
Originally Posted by terd ferguson View Post
This is from the shop manual for a '55 chevy pickup with a 235 (same pump). These are instructions for reassembling the fuel pump. Check out number six...

http://chevy.oldcarmanualproject.com...5ctsm06m32.htm



Here's the beginning of the section on the fuel pump. Keep clicking "next page" at the bottom to go through the entire fuel pump section in the manual...

http://chevy.oldcarmanualproject.com...5ctsm06m29.htm

As I was reading through this stuff over at the HAMB, I saw the pump upside down compaired to the small block and thought "oh crap" searched many pages of 235 pics and most of them show the L side (intake, headers, cool stuff) did get enough pics to prove its upfriggenside down
Thanks terd for waking me up !


And not for nothing, but it took three fuel pumps from Napa before I got a good one. Where's yours from?
Its a Napa also, cross your fingers !
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Old 01-10-2010, 01:16 PM   #8
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Re: Need fuel : 235 question

Oh and Silly don't tell anybody I had the lines backward also !
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Old 01-10-2010, 01:27 PM   #9
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Re: Need fuel : 235 question

Sounds like you guys got it figured out... So did it work yet?
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Old 01-10-2010, 01:37 PM   #10
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Re: Need fuel : 235 question

Yeah, let us know. Video may be in order. I'm crawling under the Buick now that the garage is warm and before I get too comfortable.

Nonhog, your secret is safe with me.
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Old 01-10-2010, 01:58 PM   #11
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Re: Need fuel : 235 question

Quote:
Originally Posted by NONHOG View Post
Maybe I should not install it upside down ? Maybe that would help.
Thats what I get for working in the dark.
Hope thats it !
You would probably have a big oil leak if you ran it upside down.

If I were you, I'd take it back to NAPA. Should be guaranteed for a year. Maybe there was a bad batch?
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Old 01-10-2010, 03:17 PM   #12
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Re: Need fuel : 235 question

Run the inlet out of a can. You may have a clogged line
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Old 01-10-2010, 04:40 PM   #13
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Re: Need fuel : 235 question

Quote:
Originally Posted by Bigblue29 View Post
Sounds like you guys got it figured out... So did it work yet?
A few hours later its a runner !

Quote:
Originally Posted by Sillyoldman View Post
Yeah, let us know. Video may be in order. I'm crawling under the Buick now that the garage is warm and before I get too comfortable.

Mrs.Nonhog was away this morning so sadly no video

Nonhog, your secret is safe with me.
Quote:
Originally Posted by terd ferguson View Post
You would probably have a big oil leak if you ran it upside down.
It wasn't big yet due to only running seconds at a time.


So putting the pump on correctly and after I fixed my massive fuel leak It runs but revs pretty high.
I did drive it a little to position it better, looks a little more parked a little less abandoned.
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Old 01-10-2010, 04:42 PM   #14
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Re: Need fuel : 235 question

I changed the pump on my 235 a few years ago and had a similar problem. When I finally took the line off and ran a wire through it, I pushed a mud dauber out of the line! It must have climbed in to make a next while I had it apart and the fumes killed it. It was enough of a clog that I couldn't get fule past him!

I also did a Jeep in HS that wouldn't run, I'd put the lines on backwards as well. Doesn't do much good.

Truck looks great by the way. Nice wash job!

Last edited by Dan Bowles; 01-10-2010 at 04:43 PM.
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Old 01-10-2010, 07:45 PM   #15
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Re: Need fuel : 235 question

Dude! You backed it up four feet and didn't call me? Whatever!

Does it run at idle?
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Old 01-10-2010, 09:58 PM   #16
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Re: Need fuel : 235 question

Glad you solved the problem. I will admit to replacing a pump once and forgetting to put the rod back in, it got buried on the bench under a rag. I've also broke the ears on one trying to tighten it while the rod compressed the pump arm. Those little details are why I still review the process in my manuals, I too am getting a little senile.
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Old 01-10-2010, 10:12 PM   #17
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Re: Need fuel : 235 question

Quote:
Originally Posted by Dan Bowles View Post
I changed the pump on my 235 a few years ago and had a similar problem. When I finally took the line off and ran a wire through it, I pushed a mud dauber out of the line! It must have climbed in to make a next while I had it apart and the fumes killed it. It was enough of a clog that I couldn't get fule past him!


Truck looks great by the way. Nice wash job!
Thanks it looks better in pictures. I'll likely replace the fuel line when I deal with the tank.[/COLOR]

Quote:
Originally Posted by Sillyoldman View Post
Dude! You backed it up four feet and didn't call me? Whatever!

Does it run at idle?
No tach but my guess is 2500+,not so good but putting her in gear made it better. I'd have called but didn't want to disturb Buick progress !

Quote:
Originally Posted by OrrieG View Post
Glad you solved the problem. I will admit to replacing a pump once and forgetting to put the rod back in, it got buried on the bench under a rag. I've also broke the ears on one trying to tighten it while the rod compressed the pump arm. Those little details are why I still review the process in my manuals, I too am getting a little senile.
Funny thing is I think I did the same dang thing(upside down) on my wifes Volvo Amazon.
some people never learn. (that'd be me)
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