Gas tank on driver side has a problem! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

sam's 72 · 01-27-2003, 09:05 AM

I just bought my son a 87 SWB chevy truck, 350 EFI, the guy I bought it from told me not to use the drivers side gas tank, said the fuel pump on the tank needs replaced. My question is does both tanks have fuel pumps due to the EFI? Or is there just one common fuel pump for both tanks, and some thing else is wrong?
If so what could it be that the drivers side tank will not deliver fuel to the engine?
I would like to get this tank workable again. So please help me out on what to look for.
Thanks,
Sam

*rustedchevy* · 01-27-2003, 11:48 AM

each should have an electric pump, TBI engines

Prerunner1982 · 01-27-2003, 12:51 PM

you sure its the pump? or could it be the switch?... switch is the easiest of the two to fix..

*rustedchevy* · 01-27-2003, 01:03 PM

electric pumps are only in tanks on FI vehicles

87gmc · 01-27-2003, 06:04 PM

yep, there is a electronic sending unit in each of the tanks, but i would also check the switch, when you switch tanks does the gas guage change or not?

sam's 72 · 01-27-2003, 06:31 PM

Thanks for the help guys! Man I just bought this truck two days ago, the guy I bought it from said it was the fuel pump. To tell you the truth, I have not put any gas in that tank due to what he told me, I will check out the switch over switch on it. Then get back with you guys on this. So if I switch tank and the gas gauge moves say to full to mt ( due to not haveing gas in that bad tank ) Then what you are telling me is that it is probabley the pump in the tank?
Sam

79BIG10 · 01-28-2003, 05:31 AM

I would place $5 in the driver side tank. Then go home and flip the switch to the driver side. If the truck sputters and dies even with you pressing on the pedal (some bad gas could still be in there) to give it more gas then your valve itself, the fuel pump, or the wiring is bad to the fuel pump. Let us know what you find out and we can give you steps to diagnose from there.

01-27-2003, 09:05 AM	#1
sam's 72 Senior Member Join Date: Nov 2001 Location: Pasadena, Texas, USA Posts: 1,005	Gas tank on driver side has a problem! I just bought my son a 87 SWB chevy truck, 350 EFI, the guy I bought it from told me not to use the drivers side gas tank, said the fuel pump on the tank needs replaced. My question is does both tanks have fuel pumps due to the EFI? Or is there just one common fuel pump for both tanks, and some thing else is wrong? If so what could it be that the drivers side tank will not deliver fuel to the engine? I would like to get this tank workable again. So please help me out on what to look for. Thanks, Sam __________________ 72 LWB chevy truck. Pasadena, Texas

01-27-2003, 12:51 PM	#3
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,904	you sure its the pump? or could it be the switch?... switch is the easiest of the two to fix.. Last edited by Prerunner1982; 01-27-2003 at 01:26 PM.

01-27-2003, 06:04 PM	#5
87gmc I Got My Engine!!!!! Join Date: Oct 2002 Location: Palmer, AK Posts: 253	yep, there is a electronic sending unit in each of the tanks, but i would also check the switch, when you switch tanks does the gas guage change or not? __________________ F.O.R.D. "F*cked Over Rebuilt Dodge" -+-+-+-+Cameron+-+-+-+- 1987 GMC HIGH SIERRA LWB 1500 32X11.50 383 TBI/Vortec Heads/Intake MSD Ignition Dual Exhaust Custom Pinstriping Sweet interior & stereo http://www.cgalvin29.freehomepage.com

01-27-2003, 06:31 PM	#6
sam's 72 Senior Member Join Date: Nov 2001 Location: Pasadena, Texas, USA Posts: 1,005	Thanks for the help guys! Man I just bought this truck two days ago, the guy I bought it from said it was the fuel pump. To tell you the truth, I have not put any gas in that tank due to what he told me, I will check out the switch over switch on it. Then get back with you guys on this. So if I switch tank and the gas gauge moves say to full to mt ( due to not haveing gas in that bad tank ) Then what you are telling me is that it is probabley the pump in the tank? Sam __________________ 72 LWB chevy truck. Pasadena, Texas

01-28-2003, 05:31 AM	#7
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	I would place $5 in the driver side tank. Then go home and flip the switch to the driver side. If the truck sputters and dies even with you pressing on the pedal (some bad gas could still be in there) to give it more gas then your valve itself, the fuel pump, or the wiring is bad to the fuel pump. Let us know what you find out and we can give you steps to diagnose from there. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

01-27-2003, 11:48 AM	#2
rustedchevy Account Suspended Join Date: Jan 2003 Location: il Posts: 115	each should have an electric pump, TBI engines

01-27-2003, 01:03 PM	#4
rustedchevy Account Suspended Join Date: Jan 2003 Location: il Posts: 115	electric pumps are only in tanks on FI vehicles



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