Ok.
I have noticed that when my gas tank shows 1/4 or less, the engine acts up, like it is almost on "E" and running out. The hesitation and all. Is the fuel pump going bad or is the gauge wrong? If it is the fuel pump, where is it?

Ron



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1989 Chevy Suburban/454tbi/2500/4x2/3:42;G80/F&R a-c/K&N air filter/180* Thermo Stat/70 Series FlowMaster; 3" pipe/10city;13 highway

when your tank gets low you start sucking up all the "crap gas" and dirt in your tank, which doesnt exactly do you engine any good. Its always a good idea with older cars (even 80's cars) to not let them get under 1/4.

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Justin Kramer
kman1@ptd.net
1968 Chevelle 300 Deluxe Sport Coupe 350ci (http://laijara.clanpages.com/chevelle.html)
1978 Malibu Classic 305ci (http://laijara.clanpages.com/malibu.html)
Everyone wants their car to look stock and haul ass, my car looks ass; hauls stock.

What would be sign of the fuel pump going bad? Just asking cause I just replaced the water pump.

Ron

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1989 Chevy Suburban/454tbi/2500/4x2/3:42;G80/F&R a-c/K&N air filter/180* Thermo Stat/70 Series FlowMaster; 3" pipe/10city;13 highway

I believe it's a combination of the fuel gauge not being accurate and the fact that the sender isn't linear in it's travel.

With my Suburban (same as yours), I can drive for quite a long time and the fuel gauge never moves, then slowly moves down from full, then moves rather quickly from full to half full.

If I remember correctly, these trucks hold between 38 and 40 gallons. Since my truck gets 10 mpg under daily driving conditions, I simply full the tank when I reach 300 to 325 miles on my odometer...I just don't trust letting it get any lower than a little past 1/2 full.

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Malibumotorsports (http://www.Malibumotorsports.cjb.net)
79 Malibu, 414 ci BBC, 3550 lbs.
10.92 @ 122 mph, 1.55 60'
BSE Power

I had the exact same thing happen to me on a 91 Chevy truck that I had. When I dropped the tank to replace the pump, I found that the sock had collapsed from trash in the tank. Even though it was just the sock being collasped I went ahead and replaced the pump anyway. No telling how long the pump would of lasted after being starved for so long.

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Mike Hurta
(Aug98)
Gold#25
Lake Jackson, Texas
www.chevelles.com/feature/aug98.html (http://www.chevelles.com/feature/aug98.html)

<BLOCKQUOTE>quote:</font><HR>Originally posted by Todd Geisler:
I believe it's a combination of the fuel gauge not being accurate and the fact that the sender isn't linear in it's travel.

With my Suburban (same as yours), I can drive for quite a long time and the fuel gauge never moves, then slowly moves down from full, then moves rather quickly from full to half full.

If I remember correctly, these trucks hold between 38 and 40 gallons. Since my truck gets 10 mpg under daily driving conditions, I simply full the tank when I reach 300 to 325 miles on my odometer...I just don't trust letting it get any lower than a little past 1/2 full.

<HR></BLOCKQUOTE>

Thats what I do "most" of the time is go off of 10mpg to estimate



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1989 Chevy Suburban/454tbi/2500/4x2/3:42;G80/F&R a-c/K&N air filter/180* Thermo Stat/70 Series FlowMaster; 3" pipe/10city;13 highway

<BLOCKQUOTE>quote:</font><HR>Originally posted by Aug98:
I had the exact same thing happen to me on a 91 Chevy truck that I had. When I dropped the tank to replace the pump, I found that the sock had collapsed from trash in the tank. Even though it was just the sock being collasped I went ahead and replaced the pump anyway. No telling how long the pump would of lasted after being starved for so long.

<HR></BLOCKQUOTE>


Does it run any better? How much was pump?


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1989 Chevy Suburban/454tbi/2500/4x2/3:42;G80/F&R a-c/K&N air filter/180* Thermo Stat/70 Series FlowMaster; 3" pipe/10city;13 highway

If you want to replace the pump in a pickup, the easiest way is to lift the box off, and change it from the top. No tank to drop, no rusty straps to deal with, and it does not need to be drained. The local G.M. dealer told me this and I have done it twice. Climb underneath with an impact gun, and undo the bolts holding the box on, unplug the wiring at the left tail light, and two guys can slide the box back. Going to be a lot harder on a Suburban!