Fuel Pump...

[golana]

can our fuel pumps be ran outside of the tank? im putting a custom fuel cell in my truck and am wondering if i could just run a line from the fitting in the bottom of my tank to the fuel pump outside of the tank, and then to my TB...

[Krazie Sj]

Wouldn't recommend it. The fuel helps both lubricate and cool the pump. Having out of the tank would cause it to fail quickly.

[oriontaco]

Holley in line electric pump.

[golana]

Holley in line electric pump.

i dont have the $$ for one of those haha, im trying to build it on a budget... maybe ill just keep it in the tank on the bottom or something... ill figure it out.

the fuel gauge sender is going to be the tricky part...

[Wellsy]

I'm using factory pump and factory sender in a fuel cell in mine - works great. Just need some foam or a multi point pickup for when I get it on its side ;)

[golana]

I'm using factory pump and factory sender in a fuel cell in mine - works great. Just need some foam or a multi point pickup for when I get it on its side ;)

how deep is your fuel cell? i built mine myself for my s10, but i scrapped it and now im putting it on my toy...

[lackneramanda]

Wouldn't recommend it. The fuel helps both lubricate and cool the fuel pump (http://www.carparts.com/Fuel-Pumps/600022093.car). Having out of the tank would cause it to fail quickly.

Im looking for a bit of advice. I have a 99 s-10 trailblazer and I replaced the fuel sending unit about 10 months ago. I did buy a less expensive one online hoping to save money but I think it may have made a mistake. It quit on me.

in the past 2 months i have been getting the p0452 low pressure trouble code. I took it for a tune up and they couldnt get the fuel filter off so i have to take it back and get a line kit.. BUT in the meantime if im going up hills or have the tach above 2200 for more than 20 seconds the vehicle gets random multiple misfires runs like crap then goes back to normal after a few seconds and runs fine.

now here is the kicker! The pump quit working. I did a relay check and it was fine. I disconnected the plug from the tank and used my multimeter to check voltages When the key is first turned on im getting 12 v after a few seconds it drops to around 8.5v then of course the vehicle is not on so it eventually goes back to 0v. Are those the correct voltages?

In a nut shell the pump will not prime, vehicle will not start. and I am going to buy the expensive delphi sending unit this friday but first i would like a professional suggestion from you guys before I go and pay 400 for a new pump Am I heading in the right direction?

[golana]

Im looking for a bit of advice. I have a 99 s-10 trailblazer and I replaced the fuel sending unit about 10 months ago. I did buy a less expensive one online hoping to save money but I think it may have made a mistake. It quit on me.

in the past 2 months i have been getting the p0452 low pressure trouble code. I took it for a tune up and they couldnt get the fuel filter off so i have to take it back and get a line kit.. BUT in the meantime if im going up hills or have the tach above 2200 for more than 20 seconds the vehicle gets random multiple misfires runs like crap then goes back to normal after a few seconds and runs fine.

now here is the kicker! The pump quit working. I did a relay check and it was fine. I disconnected the plug from the tank and used my multimeter to check voltages When the key is first turned on im getting 12 v after a few seconds it drops to around 8.5v then of course the vehicle is not on so it eventually goes back to 0v. Are those the correct voltages?

In a nut shell the pump will not prime, vehicle will not start. and I am going to buy the expensive delphi sending unit this friday but first i would like a professional suggestion from you guys before I go and pay 400 for a new pump Am I heading in the right direction?

honestly, the gm pumps are garbage... its almost like they are designed to fail after a year or so... having the tank above 1/2 ALL THE TIME helps, but they still like to fail... if i were you, i'd look for some kind of aftermarket pump... maybe something similar to what drag cars use...

or maybe something like this:
http://www.summitracing.com/search/Department/Air-Fuel-Delivery/Section/Fuel-Pumps-Regulators/Brand/Mr-Gasket/Product-Line/Mr-Gasket-High-Performance-Electric-Fuel-Pumps/?autoview=SKU

just plum that outside your tank somewhere, and run a line down from your stock pump, or you could probably even just leave the pump in the tank, just run this pump on the supply line from your tank...

i would get something that works good, and isnt made my gm, or a supplier that makes parts for gm... i am speaking from experience... i KNOW gm fuel pumps like to die quick... i priced one out for my s10 blazer from the dealership, and said forget it... i'll modify a toyota pump to work before buying one from them, and having it fail... or pick n pull... but i doubt youd find any 99t-blaze's there...

this is also just my .02, take it for a grain of salt

[Tarzan]

Sorry to aid in derailing this thread but in regards to Lackneramanda fuel pump question.

I don't mean to state the obvious but if your fuel filter is seized on and was not replaced when the last pump was in you can say goodbye to the new pump. You should have B+ voltage for prime and it will drop after a few seconds. Check both the ground and voltage ckts at the pump and if in doubt power up the pump and wack the tank - if the pump runs then it's toast. First you have to get that fuel filter out of there. One method is to cut the filter at each fitting end and then after soaking in penetrating fluid use a line wrench on the line and a socket on the fitting left over from the filter. When you apply torque hold the wrench still and apply the torque to the socket as the line and fitting may be seized together as well. Good luck it's no fun fighting seized fuel lines.