east302
Full Access Member
I vaguely remember seeing something where the wires go through the firewall near the booster. Not sure though.
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
Fuel Pressure issue?
- Thread starter TahoeInFC
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
OP
OP
TahoeInFC
Member
Ah, well, that's a possibility I didn't check. Maybe it's dangling inside the cab under the dash. I'll check this out tonight when I get home. Thanks.
Sent from my SM-G920T using Tapatalk
east302
Full Access Member
It was on the engine side, but I could be thinking of something else. Worth a shot, if it had my truck here I'd check.
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
OP
OP
TahoeInFC
Member
I took a quick look out in the engine bay up next to the booster. I found the trailering wire bundle, but no loose red wires. I'll take a better look later...only had a couple of minutes to look just now.
OP
OP
TahoeInFC
Member
Hi All,
It's been awhile since I've come back to this, but the truck has been running fine since I worked on it last year.
...That is until today.
Cranks, but no start. Cannot hear fuel pump whine at key-on...no fuel pressure. I think it finally gave up the ghost. The fuel pump relay checks out on the bench, and the terminals in the fuse box are all getting power when they need it. Fuse is fine. I can tap on the tank, but can't get it to start humming. I think it's all hummed-out. Not feeling the love.
Overall, not a bad life for what I think is a stock pump (more than 146k), so I'm going to start the hunt for a new one.
My question...what's the favorite brand of replacement? Should I pony up for an OEM, or is there an aftermarket pump out there that is giving good service? I've heard Airtex, along with many of the brands sold at AutoZone, O'Reilly, and other places are junk and to avoid them.
Thanks!
It's been awhile since I've come back to this, but the truck has been running fine since I worked on it last year.
...That is until today.
Cranks, but no start. Cannot hear fuel pump whine at key-on...no fuel pressure. I think it finally gave up the ghost. The fuel pump relay checks out on the bench, and the terminals in the fuse box are all getting power when they need it. Fuse is fine. I can tap on the tank, but can't get it to start humming. I think it's all hummed-out. Not feeling the love.
Overall, not a bad life for what I think is a stock pump (more than 146k), so I'm going to start the hunt for a new one.
My question...what's the favorite brand of replacement? Should I pony up for an OEM, or is there an aftermarket pump out there that is giving good service? I've heard Airtex, along with many of the brands sold at AutoZone, O'Reilly, and other places are junk and to avoid them.
Thanks!
east302
Full Access Member
For a job that you’d rather not repeat too soon, I’d go with an ACDelco part.
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
Kelsda
Full Access Member
OEM lasted 18+ years
OP
OP
TahoeInFC
Member
Solid reasoning.
I thought about that too, but 18 years is also a long time for GM suppliers to change. The manufacturer of the original pump is not necessarily who makes it today, especially because manufacturers are always looking to save money somewhere.
This was my reasoning for asking what is working for people today.
Thanks
Sent from my SM-G920T using Tapatalk
JonnyTahoe
Full Access Member
Your right long debated issue is these fuel pumps. Many many threads on these pumps everybody wants the best pump for the money but just because I got X amount of years out of my pump doesn't mean you will with that exact brand pump.
JonnyTahoe
Full Access Member
Depends on your situation when you see the prices for an OEM pump you may consider an auto store pump. People do buy them and they get some years out of them.
OP
OP
TahoeInFC
Member
Yes, good point. Has a lot to do with environment (hot climate), letting tank run low, fuel quality, installation quality, bad day at the fuel pump factory.
Was just looking for general comments.
Thanks
Sent from my SM-G920T using Tapatalk
OP
OP
TahoeInFC
Member
Ha! Yes, definitely. $300 does make one want to look for alternatives.
Thanks
Sent from my SM-G920T using Tapatalk
JonnyTahoe
Full Access Member
Last edited:
OP
OP
TahoeInFC
Member
Yeah, I'm starting to think along those lines. Fuel pumps are sort of a bummer to fix, so definitely want it to last. Going to see if I can find one around here tomorrow.
Sent from my SM-G920T using Tapatalk
Kelsda
Full Access Member
Last edited:
OP
OP
TahoeInFC
Member
Hi All,
I found a Delphi pump locally and snapped it up. Installed it last night (much cussing and scraped fingers), but got it in, along with a new fuel filter. Fuel pressure jumped right up to a little over 65psi on key-on, then settled in right around 60 while running. I think it runs better now...guessing my fuel pressure has been suffering a little lately, so engine efficiency may not have been where it should be.
BUT! (there's always a 'but') Of course, as some wrenching jobs go, I have a new problem. I have a fairly obvious gas smell in the driver's side rear wheel well. Naturally, I suspected a line that wasn't quite engaged, so I grabbed a flashlight and started crawling around under the Tahoe.
Tank is dry all the way around. No evidence of leaks anywhere.
Not satisfied, I grabbed a telescoping mirror and situated it so I could see the top of the tank from below. Tricky, but possible. Did this from both sides of the tank. I could see pressure sensor hookups and the top of the pump/sender assembly. All the lines were connected and dry...no signs of leakage. I made sure the high-pressure lines were fully engaged, which they are. No fuel drips or sprays on the tank, the lines, the wires, or the floor pan above the tank. All dry. I hit the key a few times to charge the pressure, and still did not find anything. I even started the truck and let it run for a few minutes while I crawled around. No sprays or drips. Hmmmm...
Oddly, I really didn't smell gas around the tank nearly as much as in the wheel well. I investigated all the fuel lines from the tank to the frame rail all the way to the newly-installed Delco fuel filter. All dry. No signs of drips or dampness.
When I had the tank out, I peeked inside. Nice and clean. No signs of anything but a little surface rust on the outside. This truck has spent nearly it's entire life in a garage in either Texas or Colorado...not any rust to speak of anywhere on the vehicle. When the new pump went in, the rubber O-ring was properly positioned and nice and tight.
Popped the hood...fuel lines and engine completely dry. No signs of leakage or smell of gas. Passenger-side rear wheel well doesn't smell like gas. It smells like...uh...tire.
The truck didn't ever smell like gas before I did this job, so it's gotta be related somehow, but hell if I can figure out where the leak is.
I did fill it up this morning, but that has never produced a gas smell before yesterday.
Is it possible that my new-found fuel pressure from the new pump has found a weak link somewhere, and is forcing vapors rather than liquid fuel out someplace? Worn out lines someplace? Ideas?
Thanks, folks!
I found a Delphi pump locally and snapped it up. Installed it last night (much cussing and scraped fingers), but got it in, along with a new fuel filter. Fuel pressure jumped right up to a little over 65psi on key-on, then settled in right around 60 while running. I think it runs better now...guessing my fuel pressure has been suffering a little lately, so engine efficiency may not have been where it should be.
BUT! (there's always a 'but') Of course, as some wrenching jobs go, I have a new problem. I have a fairly obvious gas smell in the driver's side rear wheel well. Naturally, I suspected a line that wasn't quite engaged, so I grabbed a flashlight and started crawling around under the Tahoe.
Tank is dry all the way around. No evidence of leaks anywhere.
Not satisfied, I grabbed a telescoping mirror and situated it so I could see the top of the tank from below. Tricky, but possible. Did this from both sides of the tank. I could see pressure sensor hookups and the top of the pump/sender assembly. All the lines were connected and dry...no signs of leakage. I made sure the high-pressure lines were fully engaged, which they are. No fuel drips or sprays on the tank, the lines, the wires, or the floor pan above the tank. All dry. I hit the key a few times to charge the pressure, and still did not find anything. I even started the truck and let it run for a few minutes while I crawled around. No sprays or drips. Hmmmm...
Oddly, I really didn't smell gas around the tank nearly as much as in the wheel well. I investigated all the fuel lines from the tank to the frame rail all the way to the newly-installed Delco fuel filter. All dry. No signs of drips or dampness.
When I had the tank out, I peeked inside. Nice and clean. No signs of anything but a little surface rust on the outside. This truck has spent nearly it's entire life in a garage in either Texas or Colorado...not any rust to speak of anywhere on the vehicle. When the new pump went in, the rubber O-ring was properly positioned and nice and tight.
Popped the hood...fuel lines and engine completely dry. No signs of leakage or smell of gas. Passenger-side rear wheel well doesn't smell like gas. It smells like...uh...tire.
The truck didn't ever smell like gas before I did this job, so it's gotta be related somehow, but hell if I can figure out where the leak is.
I did fill it up this morning, but that has never produced a gas smell before yesterday.
Is it possible that my new-found fuel pressure from the new pump has found a weak link somewhere, and is forcing vapors rather than liquid fuel out someplace? Worn out lines someplace? Ideas?
Thanks, folks!
east302
Full Access Member
I’d coat everything under there with a degreaser and drench it with a hose. Let it dry and see if the smell is back.
It could just be gas spilled when you pulled the pump, dispenser/fill line...
Sent from my iPhone using Tapatalk
It could just be gas spilled when you pulled the pump, dispenser/fill line...
Sent from my iPhone using Tapatalk
OP
OP
TahoeInFC
Member
That's a fantastic idea. I may try that this weekend, unless I get a chance before.
Thanks!
Sent from my SM-G920T using Tapatalk
OP
OP
TahoeInFC
Member
Hey all, realized I never closed this one out.
I cleaned up the tank and surrounding area as east302 suggested and let it go.
Fuel smell has not returned. I think it's good to go.
Thanks all for your help!
Sent from my SM-G920T using Tapatalk
