Replacing my TBI fuel pump

[srgould41]

I am using a Carter P5001 pump mounted on the frame rail. It has worked well for the last 5 years, but is starting to cut out. My largest complaint has been the noise. It can be heard from a ways away and is just so annoying. I am looking for other external pump options that are not quite so loud.

I am favoring the Walbro pumps at the moment, but don't have any experience with them. Walbro makes a TBI pump, GSL395. They also have a high pressure pump GSL392 that I have seen Youtube videos of while running. They are nearly silent in the videos. I don't know how the 395 would compare sound wise to the 392. I have asked around and others have used high pressure pumps with TBI's without AFR issues, but I am a bit leery.

Does anyone have experience with the GSL395 or 392? Other suggestions for quiet external pumps?

Thanks

 

[Steamer]

Just thought I'd mention that the GSL395 is max 20 psi. Too low for the Sniper anyway. GSL394 & GSL392 are both 87 psi max.

"Walbro Pumps"

 

[srgould41]

I am currently running the stock 5.7l TBI with higher flowing injectors (police motor) so 20 psi would do the job.

 

[jim land]

What year is your engine. ?

 

[BrianSanDiego]

I'm running the higher pressure Walbro pump and it's not very loud. I currently have it hose-clamped to the crossmember, with foam, and I can hear it whirring but it's not obnoxious or anything. Once the motor starts I don't hear it anymore. ...if that helps at all.

 

[srgould41]

1990

What year is your engine. ?

 

[srgould41]

Thank you. Are you running TBI or something else?

I'm running the higher pressure Walbro pump and it's not very loud. I currently have it hose-clamped to the crossmember, with foam, and I can hear it whirring but it's not obnoxious or anything. Once the motor starts I don't hear it anymore. ...if that helps at all.

 

[reddingcruiser]

Put it in the tank.

 

[Downey]

Take a gander at ebay #263646816962, this can be used in my rear fuel cell or in the stock tank, just cut down the height for use in the stock tank. THEN 15 psi TBI in-tank fuel pumps are WAY cheaper than what you'll pay for an out of tank pump.

 

[reddingcruiser]

In - tank pumps run MUCH cooler.

 

[BrianSanDiego]

Thank you. Are you running TBI or something else?

Holley Sniper TBI, but it runs at 60psi.

 

[thecrazygreek]

One thing I noticed about noise.
It makes a huge difference how you route your fuel hose, filters, and pump.
All of them in a straight line AFTER about at least 6 inches from a bend in the hose.
Also firmly mounted helps allot, hoses, pump, and filters.

 

[76 PTO]

go to tbi chips.com Brian is an awesome source for tbi info. He recommended a pump for me. It was a stock pump out of something. Works great.

 

[srgould41]

Thanks for all the advice. I put a lot of thought into the internal/external question. If I were to do an internal pump I was leaning towards the tanksinc units. However, my 40 is mainly used on wheeling trips. I have to think about ease of replacement too. I carry spare parts for specific items I have had fail in the past or seen fail on other rigs, pumps being one of them. I have helped with replacing failed fuel pumps before (not mine thankfully) and the worst was about a 4 hour ordeal. Well, actually the worst one was a rig with a pump that wasn't replaceable on the trail. We had to haul him out and get him on a trailer. If I have to do a trail repair I would rather not have to remove my seat and frame then dig into the tank to replace the pump (after being towed to level ground). Right now the pump is attached to a custom cross member with rubber isolators, filters, etc. I even have a shutoff valve upstream. It takes all of about 10 minutes to replace as long as I can squeeze under there.

 

[76 PTO]

if you give him a call he can tell you exactly the part number for the external pump he recommends.

 

[BrianSanDiego]

Thanks for all the advice. I put a lot of thought into the internal/external question. If I were to do an internal pump I was leaning towards the tanksinc units. However, my 40 is mainly used on wheeling trips. I have to think about ease of replacement too. I carry spare parts for specific items I have had fail in the past or seen fail on other rigs, pumps being one of them. I have helped with replacing failed fuel pumps before (not mine thankfully) and the worst was about a 4 hour ordeal. Well, actually the worst one was a rig with a pump that wasn't replaceable on the trail. We had to haul him out and get him on a trailer. If I have to do a trail repair I would rather not have to remove my seat and frame then dig into the tank to replace the pump (after being towed to level ground). Right now the pump is attached to a custom cross member with rubber isolators, filters, etc. I even have a shutoff valve upstream. It takes all of about 10 minutes to replace as long as I can squeeze under there.

That's what I do too, keep an extra packed up as a spare. I'm content with the Walbro, not very loud and fair price. I did kill one though, I think due to running the tank dry. I was in the habit off running one fuel tank empty before switching over, and it didn't seem the fuel pump appreciated that too much, but I think that's true with most electrics. I haven't run my current pump dry and it's held up fine so far.

 

[reddingcruiser]

Thanks for all the advice. I put a lot of thought into the internal/external question. If I were to do an internal pump I was leaning towards the tanksinc units. However, my 40 is mainly used on wheeling trips. I have to think about ease of replacement too. I carry spare parts for specific items I have had fail in the past or seen fail on other rigs, pumps being one of them. I have helped with replacing failed fuel pumps before (not mine thankfully) and the worst was about a 4 hour ordeal. Well, actually the worst one was a rig with a pump that wasn't replaceable on the trail. We had to haul him out and get him on a trailer. If I have to do a trail repair I would rather not have to remove my seat and frame then dig into the tank to replace the pump (after being towed to level ground). Right now the pump is attached to a custom cross member with rubber isolators, filters, etc. I even have a shutoff valve upstream. It takes all of about 10 minutes to replace as long as I can squeeze under there.

FWIW, I have an in-tank set that uses a OEM '03 Chevy Tahoe fuel pump unit, easy-peezy from almost any auto parts store. (I had the same type setup previously for my TBI engine) As a back-up, since everything is set up with AN fittings, I adapted the stock FJ40 supply and return lines with hose to AN fittings so I can quickly throw in my spare in-line pump if something happens.

But, you gotta do what works for you

 

[srgould41]

Huh, never thought if leaving the external pump in place and using a Y block downstream for the in-tank pump. That would take only seconds to switch to the backup pump if the primary failed. I'll think on that.

FWIW, I have an in-tank set that uses a OEM '03 Chevy Tahoe fuel pump unit, easy-peezy from almost any auto parts store. (I had the same type setup previously for my TBI engine) As a back-up, since everything is set up with AN fittings, I adapted the stock FJ40 supply and return lines with hose to AN fittings so I can quickly throw in my spare in-line pump if something happens.

But, you gotta do what works for you