another fuel pump shit da bed
Thread Starter
Launching!
Joined: Dec 2005
Posts: 213
Likes: 2
another fuel pump **** da bed my second in-line walbro in 3 yrs. car only has less than 2000miles. this time, ran fine, shut car at gas station,(was on 1/4 tank) went to start and nothing!. pressure was less than 20lbs. pump was buzzing like normal. got a used spare from garage, swapped, and got home. amazing-
bought the last one from a respectable e-bayer with thousands of positive feedback.banging my head--------
bought the last one from a respectable e-bayer with thousands of positive feedback.banging my head--------
Didn't know this, but frankly not surprised. Even the reputable seller could have unknowingly bought crap product. Fuel pump is really the one thing that you don't want to crap out on you, can put you in a real **** situation!
I have a friend that was going through fuel pumps like crazy till we figured out that it was not the pumps but the wiring to the pump causing the problem. If the fuel pump is far from the battery and is using smaller gauge wire it may not be getting enough voltage and in time can cause the fuel pump to fail.
Here is an example: Fuel pump is near the fuel tank, and the battery is near the engine. Let's say the wire is 15 feet long with all the routing, Now lets say it was wired using aluminum 16 gauge wire and the pump pulls 10 amps. Using the calculator at http://genuinedealz.com/voltage-drop.html
The voltage at the pump would be 9.567 volts.
Here is an example: Fuel pump is near the fuel tank, and the battery is near the engine. Let's say the wire is 15 feet long with all the routing, Now lets say it was wired using aluminum 16 gauge wire and the pump pulls 10 amps. Using the calculator at http://genuinedealz.com/voltage-drop.html
The voltage at the pump would be 9.567 volts.
Thread Starter
Launching!
Joined: Dec 2005
Posts: 213
Likes: 2
well, gonna do 2 things. A-order order a new unit from Summit, as they now carry Walbro, B-maybe install larger gauge wire. good idea,worth a shot! (having a Monte thats 100 ft long to the rear isnt helping the AMP droppage)!
The china made, fake Walbro, pumps look exactly like the real thing on the outside. You would have to take one apart and know what to look for to see the difference. If you find a Walbro and it's $25 to $40 cheaper than most others, it's a fake.
Buy one from a vendor, their reputations are at stake so it's likely they won't carry fakes...
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Thread Starter
Launching!
Joined: Dec 2005
Posts: 213
Likes: 2
my GM harness was fab-ed up by John Speartech. he wires the relay to fit under the hood, with the + ouput wire about 20 ft worth. on top of that, i added a few feet due to the lenght of my car and location of pump under back bumper. i can re-wire it so the relay is in the trunk, (because i have a BAT + distribution block in trunk anyway) and only have a 5 ft distance to the pump. this will cut back the amp drop. or, i might be lazy and " relay the relay" by piggybacking the first with a second in the back. the harness relay + output can be used to trigger my second relay in the back, in fact doing the same as the first option i mentioned....(without cutting up the speartech harness). Option 3 is just cut out the thin grey + output wire from harness relay, and re-run with a thicker gauge, prolly easiest option. haha
I have a friend that was going through fuel pumps like crazy till we figured out that it was not the pumps but the wiring to the pump causing the problem. If the fuel pump is far from the battery and is using smaller gauge wire it may not be getting enough voltage and in time can cause the fuel pump to fail.
Here is an example: Fuel pump is near the fuel tank, and the battery is near the engine. Let's say the wire is 15 feet long with all the routing, Now lets say it was wired using aluminum 16 gauge wire and the pump pulls 10 amps. Using the calculator at http://genuinedealz.com/voltage-drop.html
The voltage at the pump would be 9.567 volts.
Here is an example: Fuel pump is near the fuel tank, and the battery is near the engine. Let's say the wire is 15 feet long with all the routing, Now lets say it was wired using aluminum 16 gauge wire and the pump pulls 10 amps. Using the calculator at http://genuinedealz.com/voltage-drop.html
The voltage at the pump would be 9.567 volts.
Andrew
Thread Starter
Launching!
Joined: Dec 2005
Posts: 213
Likes: 2
well sorry to say, Racetronix lost a sale today due to the fact that its mandatory site policy that you HAVE to register with them before any sale. i believe this is the most senseless thing. in this new world of BIG BROTHER, there are a thousand ways to track who is purchasing from where, and what they are buying. everything is purchased electronically, either credit card, or paypal. Email return information should be optional due to the fact of forced advertising and mailing lists shoved down you throat. but besides all that, i did try to register 5 times, on 2 different computers. kept getting "timeouts" on the browser. it wouldnt accept any registries. so due to the fact that there was no simple phone number, i went elsewhere.
i any not disputing their service or products, just venting on their management.
i any not disputing their service or products, just venting on their management.
Joined: Mar 2002
Posts: 2,032
Likes: 26
From: A Racetronix dealer near you...
well sorry to say, Racetronix lost a sale today due to the fact that its mandatory site policy that you HAVE to register with them before any sale. i believe this is the most senseless thing. in this new world of BIG BROTHER, there are a thousand ways to track who is purchasing from where, and what they are buying. everything is purchased electronically, either credit card, or paypal. Email return information should be optional due to the fact of forced advertising and mailing lists shoved down you throat. but besides all that, i did try to register 5 times, on 2 different computers. kept getting "timeouts" on the browser. it wouldnt accept any registries. so due to the fact that there was no simple phone number, i went elsewhere.
i any not disputing their service or products, just venting on their management.
i any not disputing their service or products, just venting on their management.
Customers may order from a large number of dealers who support this forum.
Thanks!
__________________
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<
Manufacturer / Distributor of Automotive Fuel Systems, Components & Electronics
Please support a Racetronix dealer near you for personalized service.
>WEB SITE<
Try Lonnie at Lonnie's Performance. I've worked with him before and he has all the Racetronix goodies.
His web site isn't the greatest, but I PM'd him here and he emailed me a paypal receipt for what I wanted, that's how we did my transaction. Smooth as glass and F A S T.
His web site isn't the greatest, but I PM'd him here and he emailed me a paypal receipt for what I wanted, that's how we did my transaction. Smooth as glass and F A S T.
Make sure your pump is gravity fed. The pump should not be mounted above the tank. The best situation is to have the feed out of the bottom of the tank and keep the pump below the bottom of the tank. A in tank fuel pump is gravity fed because it is mounted vertically at the bottom. You can also pull out of the top of the tank but mount the pump below the level of the tank. A siphon effect will make the pump work properly. If the pump is mounted above the tank, it will burn out quickly, even a true walboro. I have seen it happen many times to guys that have built my kit cars.
Scott
Brunton Auto
Drive a real sports car!!
www.bruntonauto.com
Scott
Brunton Auto
Drive a real sports car!!
www.bruntonauto.com
Thread Starter
Launching!
Joined: Dec 2005
Posts: 213
Likes: 2
it is mounted level with bottom of sumped tank. 1/4 tank, was running fine when i pulled into gas station. took a dump trying to restart. i knew about counterfeit pump rumors for years. but took my chances 2x. third time around should be better
On The Tree
Joined: Aug 2011
Posts: 151
Likes: 0
Not to steal your thread, but i have a walbro 255,
My truck fuel gauge was working correctly last time i used it, before i put all of this ls swap into it. so im not sure from it sitting it isnt reading right, or my fuel pump wont pick up.
When the gauge reads 1/4 the pump loses prime. and acts like its empty.
i put 5 gallons in it, and turn the key, tried priming it like 10 times... nothing wouldnt suck anything up. had to remove the fuel line from the fuel rail and try it again. finally got fuel.
is it common for these to be hard to prime? or whats going on here. and fuel pump is below the tank, but its pulling from a sending unit top style tank.
If anyone can help it would be great
My truck fuel gauge was working correctly last time i used it, before i put all of this ls swap into it. so im not sure from it sitting it isnt reading right, or my fuel pump wont pick up.
When the gauge reads 1/4 the pump loses prime. and acts like its empty.
i put 5 gallons in it, and turn the key, tried priming it like 10 times... nothing wouldnt suck anything up. had to remove the fuel line from the fuel rail and try it again. finally got fuel.
is it common for these to be hard to prime? or whats going on here. and fuel pump is below the tank, but its pulling from a sending unit top style tank.
If anyone can help it would be great