Need fuel : 235 question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

NONHOG · 01-10-2010, 01:24 AM

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

NONHOG · 01-10-2010, 01:49 AM

The first pic shows the black soot from when it was RUNNING !

pump pics shows new pump and old pump arm difference.

CAL 58 GMC · 01-10-2010, 02:40 AM

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.

Sillyoldman · 01-10-2010, 12:35 PM

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?

terd ferguson · 01-10-2010, 12:51 PM

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?

NONHOG · 01-10-2010, 01:05 PM

Maybe I should not install it upside down ? Maybe that would help.
Thats what I get for working in the dark.
Hope thats it !

NONHOG · 01-10-2010, 01:13 PM

Quote:

Originally Posted by terd ferguson

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 !

NONHOG · 01-10-2010, 01:16 PM

Oh and Silly don't tell anybody I had the lines backward also !

Bigblue29 · 01-10-2010, 01:27 PM

Sounds like you guys got it figured out... So did it work yet?

Sillyoldman · 01-10-2010, 01:37 PM

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.

terd ferguson · 01-10-2010, 01:58 PM

Quote:

Originally Posted by NONHOG

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?

dwcsr · 01-10-2010, 03:17 PM

Run the inlet out of a can. You may have a clogged line

NONHOG · 01-10-2010, 04:40 PM

Quote:

Originally Posted by Bigblue29

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

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

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.

Dan Bowles · 01-10-2010, 04:42 PM

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!

Sillyoldman · 01-10-2010, 07:45 PM

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

Does it run at idle?

OrrieG · 01-10-2010, 09:58 PM

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.

NONHOG · 01-10-2010, 10:12 PM

Quote:

Originally Posted by Dan Bowles

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

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

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)

01-10-2010, 01:24 AM	#1
NONHOG Registered User Join Date: Feb 2007 Location: Marana, Arizona Posts: 3,416	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 __________________ "I feel the need for speed!"... as soon as I am done with my nap.

01-10-2010, 01:49 AM	#2
NONHOG Registered User Join Date: Feb 2007 Location: Marana, Arizona Posts: 3,416	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. Attached Images __________________ "I feel the need for speed!"... as soon as I am done with my nap.

01-10-2010, 02:40 AM	#3
CAL 58 GMC Senior Member Join Date: Jun 2005 Location: Clovis Ca. Posts: 3,311	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. __________________ Classic Trucks Link http://www.classictrucks.com/feature...uck/index.html 1958 GMC.Project Build http://67-72chevytrucks.com/vboard/s...d.php?t=162816 1966 Chevelle Build http://67-72chevytrucks.com/vboard/s...d.php?t=443576 Video http://www.youtube.com/watch?v=prrNKo8F7Zw#GU5U2spHI_4 Last edited by CAL 58 GMC; 01-10-2010 at 02:41 AM.

01-10-2010, 12:35 PM	#4
Sillyoldman #16876 Join Date: Apr 2005 Location: Auburn WA Posts: 12,266	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? __________________ Posted via Stationary Device '71 Custom Deluxe C-20 402. '67 Buick Special 455. '49 Plymouth Special Deluxe. *"I love that old car smell"* *Some people are like Slinkies... not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs.*

01-10-2010, 12:51 PM	#5
terd ferguson Registered User Join Date: Mar 2009 Location: Concord, NC Posts: 531	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? __________________ "I never apologize. I'm sorry, but that's just the way I am." - Homer J. Simpson 1955 2nd Series Chevy "King Of Trucks"

01-10-2010, 01:05 PM	#6
NONHOG Registered User Join Date: Feb 2007 Location: Marana, Arizona Posts: 3,416	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 ! __________________ "I feel the need for speed!"... as soon as I am done with my nap.

01-10-2010, 01:16 PM	#8
NONHOG Registered User Join Date: Feb 2007 Location: Marana, Arizona Posts: 3,416	Re: Need fuel : 235 question Oh and Silly don't tell anybody I had the lines backward also ! __________________ "I feel the need for speed!"... as soon as I am done with my nap.

01-10-2010, 01:27 PM	#9
Bigblue29 Thanks 'til you're better paid Join Date: Dec 2008 Location: Minneapolis, MN Posts: 257	Re: Need fuel : 235 question Sounds like you guys got it figured out... So did it work yet? __________________ -Luke 1950 Chevy AD 3100 pickup 2000 GMC Sierra 1970 Jeepster Commando

01-10-2010, 01:37 PM	#10
Sillyoldman #16876 Join Date: Apr 2005 Location: Auburn WA Posts: 12,266	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. __________________ Posted via Stationary Device '71 Custom Deluxe C-20 402. '67 Buick Special 455. '49 Plymouth Special Deluxe. *"I love that old car smell"* *Some people are like Slinkies... not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs.*

01-10-2010, 03:17 PM	#12
dwcsr Hollister Road Co. Join Date: Apr 2005 Location: Houston Posts: 6,134	Re: Need fuel : 235 question Run the inlet out of a can. You may have a clogged line

01-10-2010, 04:42 PM	#14
Dan Bowles AD Addict Join Date: Oct 2009 Location: Blissfield, MI Posts: 822	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.

01-10-2010, 07:45 PM	#15
Sillyoldman #16876 Join Date: Apr 2005 Location: Auburn WA Posts: 12,266	Re: Need fuel : 235 question Dude! You backed it up four feet and didn't call me? Whatever! Does it run at idle? __________________ Posted via Stationary Device '71 Custom Deluxe C-20 402. '67 Buick Special 455. '49 Plymouth Special Deluxe. *"I love that old car smell"* *Some people are like Slinkies... not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs.*

01-10-2010, 09:58 PM	#16
OrrieG Registered User Join Date: Jun 2006 Location: Idaho Posts: 8,800	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. __________________ 1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread 1964 Chevelle Malibu w/ 355-350TH (daily driver) Helpful AD and TF Manual Site Old Car Manual Project



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.