When ordering a Sending Unit.... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

SWINGSAX68 · 02-03-2003, 02:21 PM

I had some trouble with mine. Well here we go:

I have a v8...so I ordered a v8 67-70 sending unit from Chevy Duty.

I got it and soon realized that the fuel line coming from the sending unit has a larger fitting than the fuel line in my cab.
So I went to a parts store and found a fitting that would fit the sending unit but that I could attach a rubber line to. so I cut a few inches from the steel line and attached the rubber hose. thats how it worked out no problems.

Should I have ordered one to match the original engine size, which was an inline6?

Well....if you need them I have the smaller fittings from two fuel lines that I just hack-sawed off with the bend and about 3 inches of line.

**CPNE** · 02-03-2003, 02:26 PM

f I were you I'd replace all the I6 5/16 line with the v8 3/8 line. There is a reason the v8's had larger fuel lines, even the 307 2bbl had them I believe. More cylinders mean more gas, you may find under full accelleration that it's starving for gas and has no power.

SWINGSAX68 · 02-03-2003, 02:39 PM

well.....it cuts off ocassionally when I put it in gear, and I have have it set at a high idle so it doesn't make the "I'm gonna cut off right now sound".

Blue68 · 02-03-2003, 05:35 PM

Your ingenuity is pretty good. Only where is the rubber hose? In the cab? Not the place for it. If so, run your steel line from the sending unit behind the seat through the floor. Then put in a 90 degree bend to the framerail and connect your rubber hose there.

I'm with CPNE about just replacing all of your fuel line when you get a chance. I don't think you will experience starvation under most driving circumstances. If you do some highway runs at higher speeds and then go to pass someone, you would likely run into a starvation issue, plus the pump has to work a little harder to pull the fuel through a smaller hose.

At idle, you realy shouldn't have a problem (except after a high consumption run). You may have a tuning problem if it won't idle properly.

Mountain Man · 02-03-2003, 06:20 PM

I ordered the 6cyl sending unit when I replaced mine. I run a fairly healthy 350, with edelbrock carb, and never have I had fuel starvation problems. If you have hesitation going in gear, or accelrating, you have another problem, possibly fuel filter.

SWINGSAX68 · 02-04-2003, 03:10 AM

You know.....I have two filters one before the pump and one before the carb...should I maybe get rid of one??? or all???
My tank is like super clean....so I don't have to worry about it shooting crap into the pump.

SWINGSAX68 · 02-04-2003, 03:13 AM

will the 3/8 rubber hose fit on the current fuel pump and to the carb???

02-03-2003, 02:21 PM	#1
SWINGSAX68 Now the others dig........ Join Date: May 2002 Location: San Antonio, TX Posts: 1,520	When ordering a Sending Unit.... I had some trouble with mine. Well here we go: I have a v8...so I ordered a v8 67-70 sending unit from Chevy Duty. I got it and soon realized that the fuel line coming from the sending unit has a larger fitting than the fuel line in my cab. So I went to a parts store and found a fitting that would fit the sending unit but that I could attach a rubber line to. so I cut a few inches from the steel line and attached the rubber hose. thats how it worked out no problems. Should I have ordered one to match the original engine size, which was an inline6? Well....if you need them I have the smaller fittings from two fuel lines that I just hack-sawed off with the bend and about 3 inches of line. __________________ 68 Chevy C10 Stepside Black Primer 78 GMC Longbed White 09 Chevy Silverado Shortbed Granite Blue *LOOKING FOR A 67 4 DOOR IMPALA!!!Just like Sam and Dean Winchester!! 'Cause Mustangs are for p^#$ and you can fit a body in the trunk of a 67 Impala* MEMBER OF THE DRUM BRAKE CLUB Bachelor of Music in Jazz Studies Texas State University-San Marcos, TX Certified Music Educator I hope Mom is up there watching and being my Guardian Angel "I've got a fever.....and the only prescription.....IS MORE COW BELL" -The Legendary: Bruce Dickenson "F#$@ 'em up!!!!!!" -The Legendary: Rogelio Escobar TRUCKY LINKS** http://67-72chevytrucks.com/vboard/s...d.php?t=457750 http://67-72chevytrucks.com/vboard/s...d.php?t=461184 http://67-72chevytrucks.com/vboard/s...d.php?t=472848 http://67-72chevytrucks.com/vboard/s...d.php?t=417541 http://67-72chevytrucks.com/vboard/s...d.php?t=477788

02-03-2003, 02:26 PM	#2
CPNE Resident Curmudgeon Join Date: Dec 1999 Location: NH Posts: 6,662	f I were you I'd replace all the I6 5/16 line with the v8 3/8 line. There is a reason the v8's had larger fuel lines, even the 307 2bbl had them I believe. More cylinders mean more gas, you may find under full accelleration that it's starving for gas and has no power. __________________ Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter Maybe I need to sell some of this crap Yet another Bozo with a sawz-all

02-03-2003, 02:39 PM	#3
SWINGSAX68 Now the others dig........ Join Date: May 2002 Location: San Antonio, TX Posts: 1,520	well.....it cuts off ocassionally when I put it in gear, and I have have it set at a high idle so it doesn't make the "I'm gonna cut off right now sound". __________________ 68 Chevy C10 Stepside Black Primer 78 GMC Longbed White 09 Chevy Silverado Shortbed Granite Blue *LOOKING FOR A 67 4 DOOR IMPALA!!!Just like Sam and Dean Winchester!! 'Cause Mustangs are for p^#$ and you can fit a body in the trunk of a 67 Impala* MEMBER OF THE DRUM BRAKE CLUB Bachelor of Music in Jazz Studies Texas State University-San Marcos, TX Certified Music Educator I hope Mom is up there watching and being my Guardian Angel "I've got a fever.....and the only prescription.....IS MORE COW BELL" -The Legendary: Bruce Dickenson "F#$@ 'em up!!!!!!" -The Legendary: Rogelio Escobar TRUCKY LINKS** http://67-72chevytrucks.com/vboard/s...d.php?t=457750 http://67-72chevytrucks.com/vboard/s...d.php?t=461184 http://67-72chevytrucks.com/vboard/s...d.php?t=472848 http://67-72chevytrucks.com/vboard/s...d.php?t=417541 http://67-72chevytrucks.com/vboard/s...d.php?t=477788

02-03-2003, 05:35 PM	#4
Blue68 Registered User Join Date: Apr 2000 Location: Frisco, Tx, USA Posts: 606	Your ingenuity is pretty good. Only where is the rubber hose? In the cab? Not the place for it. If so, run your steel line from the sending unit behind the seat through the floor. Then put in a 90 degree bend to the framerail and connect your rubber hose there. I'm with CPNE about just replacing all of your fuel line when you get a chance. I don't think you will experience starvation under most driving circumstances. If you do some highway runs at higher speeds and then go to pass someone, you would likely run into a starvation issue, plus the pump has to work a little harder to pull the fuel through a smaller hose. At idle, you realy shouldn't have a problem (except after a high consumption run). You may have a tuning problem if it won't idle properly. __________________ http://home.comcast.net/~r.landrum/w...tos.html-.html '68 C-10 LWB, '98 Z-71 350 w/accessories (Serpentine), Edelbrock Performer, Edelbrock 1405 (600cfm) carb, GM HEI, CompCam Extreme 4x4 roller cam, Thorley Headers, Carter Electric Fuel Pump, Vintage Air, 700r4, 3.73, disc brakes and power steering upgrades.

02-03-2003, 06:20 PM	#5
Mountain Man Registered User Join Date: Jan 2002 Location: Calgary, Alberta, Canada Posts: 451	I ordered the 6cyl sending unit when I replaced mine. I run a fairly healthy 350, with edelbrock carb, and never have I had fuel starvation problems. If you have hesitation going in gear, or accelrating, you have another problem, possibly fuel filter. __________________ 72 C10 Cheyenne Super Full trim Factory tach dash A/C dash Factory tilt 350 / 350 power train - with Edelbrock components.

02-04-2003, 03:10 AM	#6
SWINGSAX68 Now the others dig........ Join Date: May 2002 Location: San Antonio, TX Posts: 1,520	You know.....I have two filters one before the pump and one before the carb...should I maybe get rid of one??? or all??? My tank is like super clean....so I don't have to worry about it shooting crap into the pump. __________________ 68 Chevy C10 Stepside Black Primer 78 GMC Longbed White 09 Chevy Silverado Shortbed Granite Blue *LOOKING FOR A 67 4 DOOR IMPALA!!!Just like Sam and Dean Winchester!! 'Cause Mustangs are for p^#$ and you can fit a body in the trunk of a 67 Impala* MEMBER OF THE DRUM BRAKE CLUB Bachelor of Music in Jazz Studies Texas State University-San Marcos, TX Certified Music Educator I hope Mom is up there watching and being my Guardian Angel "I've got a fever.....and the only prescription.....IS MORE COW BELL" -The Legendary: Bruce Dickenson "F#$@ 'em up!!!!!!" -The Legendary: Rogelio Escobar TRUCKY LINKS** http://67-72chevytrucks.com/vboard/s...d.php?t=457750 http://67-72chevytrucks.com/vboard/s...d.php?t=461184 http://67-72chevytrucks.com/vboard/s...d.php?t=472848 http://67-72chevytrucks.com/vboard/s...d.php?t=417541 http://67-72chevytrucks.com/vboard/s...d.php?t=477788

02-04-2003, 03:13 AM	#7
SWINGSAX68 Now the others dig........ Join Date: May 2002 Location: San Antonio, TX Posts: 1,520	will the 3/8 rubber hose fit on the current fuel pump and to the carb??? __________________ 68 Chevy C10 Stepside Black Primer 78 GMC Longbed White 09 Chevy Silverado Shortbed Granite Blue *LOOKING FOR A 67 4 DOOR IMPALA!!!Just like Sam and Dean Winchester!! 'Cause Mustangs are for p^#$ and you can fit a body in the trunk of a 67 Impala* MEMBER OF THE DRUM BRAKE CLUB Bachelor of Music in Jazz Studies Texas State University-San Marcos, TX Certified Music Educator I hope Mom is up there watching and being my Guardian Angel "I've got a fever.....and the only prescription.....IS MORE COW BELL" -The Legendary: Bruce Dickenson "F#$@ 'em up!!!!!!" -The Legendary: Rogelio Escobar TRUCKY LINKS** http://67-72chevytrucks.com/vboard/s...d.php?t=457750 http://67-72chevytrucks.com/vboard/s...d.php?t=461184 http://67-72chevytrucks.com/vboard/s...d.php?t=472848 http://67-72chevytrucks.com/vboard/s...d.php?t=417541 http://67-72chevytrucks.com/vboard/s...d.php?t=477788



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