l 95 Trans Am l

iTrader: (5)

Ok Im in the middle of doing a FP swap (epoxy cement to seal the bucket back up is drying as we speak) and i found some hints along the way as to why my car was not getting fuel. 1st, theres two rubber hoses (from the factory) that run into the bucket, the one worked itself off. Second thing, my pickup had rips in it everywhere, and the third and my particular favorite; i shook the old pump around and listened inside, and theres pieces of something knocking around in there. And im not talking about the normal "thump" that you should hear on all fuel pumps. Basically id like to know what that hose being off could have caused. If im not mistaking, unused fuel from the engine comes back through there, correct?

RamAir95TA

iTrader: (2)

The line that was off is the return line. Unused fuel that returns from the rails is used to keep the bucket filled. If it is not full that can cause the pump to fail if you run it low on fuel all the time.

SS RRR

iTrader: (2)

As stated, the return fuel enters the bucket to keep the pump submerged in fuel to aid in cooling. Contrary to popular belief, it is not to keep a continuous supply to the inlet of the pump.

gregrob

iTrader: (8)

Because hot fuel definitely cools the pump... lolz

SS RRR

iTrader: (2)

Kind of like how hot coolant cools the engine?
I don't get it. Fuel is far cooler than the temp of the pump.

RamAir95TA

iTrader: (2)

Gasoline moves through the fuel rails (at 43.5psi) at an average flow rate of 9.17 m/s (almost 21 mph), which means it is in contact with the warm fuel rails (approx 28") for a mere .078 sec. I HIGHLY doubt that gasoline has the ability to heat up to the point where it's actually going to cause the pump to run hotter if it's only in contact with the fuel rails for less than a tenth of a second. Besides, gasoline has HALF of the specific heat capacity of water making it a less-than-ideal candidate as a heating or cooling medium, so the argument that return fuel actually heats up the pump doesn't make much sense...again.

SS RRR

iTrader: (2)

Really? This was an actual argument? If so, what was the logic behind what the fuel in the bucket was for?
If it were to heat up to such extremes to actually heat the pump it would easily cause vapor lock. Bing badda boom, done.

RamAir95TA

iTrader: (2)

Enjoy.

https://ls1tech.com/forums/lt1-lt4-m...d-already.html

SS RRR

iTrader: (2)

As Foghorn Legnorn would say, "That was, I say that was a painful read!"
C'mon, Greg. Perhaps in your area a bucket is not required? I dunno. I had a Walbro for less than a year w/out a bucket and it failed on a nice, hot summer day during stop/go traffic with less than a 1/2 tank of gas. Replaced it using bucket and has been in the car for over 3 years now. The bucket is definitely for cooling the pump and not for emissions.

speed_demon24

iTrader: (6)

How many of those 3 years did your car actually run?

moderate Z28

Wait, is this "bucket" you guys are referring to the plastic part that contains the actual fuel pump inside? It was tan in color on mine. Last time I took my FP out, I noticed that part was trying to come apart on the bottom. Is this bad?
I want to learn more about this bucket. Also, anyone have a diagram of the fuel return system and its associated parts?

SS RRR

iTrader: (2)

I COULDN'T find a station that DID not sell BAD GAS! GREEN! LIVE!

Actually the new pump was installed a little while before new engine. New pump has far more use now than the old pump had.

l 95 Trans Am l

iTrader: (5)

That was my thread bahaha