Well if it's not one thing it's another. I get home to work on the ac of the truck just charging it. Well I ended up also fixing the connection to the headlight. So i unhooked the battery. Got done hooked battery back up and won't start. Fuel pump isn't kicking on. So i check the connections u derby the hood the relay wire and fuel pump fuse wire. Everything has power. So i checked for power after the Inline fuses still have power. The fuel pump primed two times out of a bunch of times turning the key. It has good spark as well. So my guess is since the fuel pump isn't kicking on but every once in awhile it means the pump is bad? Does that diagnosis sound correct?
fuel pump? on the chevy truck
- Thread starter ram_man
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Try some starting fluid while cranking. If it fires, then it could be the pump or wiring to the pump (possibly a ground).
I wouldn't hit the tank with a hammer.
I wouldn't hit the tank with a hammer.
Originally Posted By: ram_man
I smacked it with my hand and it would run sometimes but still won't start.
Did you check the "auto run" relay?
I smacked it with my hand and it would run sometimes but still won't start.
Did you check the "auto run" relay?
Originally Posted By: Zaedock
Originally Posted By: ram_man
I smacked it with my hand and it would run sometimes but still won't start.
Did you check the "auto run" relay?
Where is that at? I pulled the cover on the fire wall that said fuel pump fuse, and relay
Originally Posted By: ram_man
I smacked it with my hand and it would run sometimes but still won't start.
Did you check the "auto run" relay?
Where is that at? I pulled the cover on the fire wall that said fuel pump fuse, and relay
Originally Posted By: ram_man
Originally Posted By: Zaedock
Originally Posted By: ram_man
I smacked it with my hand and it would run sometimes but still won't start.
Did you check the "auto run" relay?
Where is that at? I pulled the cover on the fire wall that said fuel pump fuse, and relay
Hang on now. Are we talking about the Dodge or the Chevy? The Chevy doesn't have an "auto run" relay. Either way, if smacking the tank made the pump start it's time for a pump.
Originally Posted By: Zaedock
Originally Posted By: ram_man
I smacked it with my hand and it would run sometimes but still won't start.
Did you check the "auto run" relay?
Where is that at? I pulled the cover on the fire wall that said fuel pump fuse, and relay
Hang on now. Are we talking about the Dodge or the Chevy? The Chevy doesn't have an "auto run" relay. Either way, if smacking the tank made the pump start it's time for a pump.
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I've had a few Chevy trucks. I had a 96 with a 5.7L. It's was a 3/4 ton. Fantastic truck until the entire dash shut off on me and buying everything from the wrecker was more than I paid for the truck.
Anyways every Chevy fuel pump I've ever had to replace whined a high pitch for months before failure,so was it whining prior to this.
Have you checked out the fuel filter? A 99 silverado fuel pump is fuel filter/fuel pump all in 1. Talk about swearing my head off n
I think on my 96 the fuel filter was under the passenger side along the frame.
Is the tank plastic or steel. Could the screen be blocked by a rust flake.
On my 99 silverado my fuel pump lasted for 250k. It whined for about 50000 so it gave me ample warning.
Anyways every Chevy fuel pump I've ever had to replace whined a high pitch for months before failure,so was it whining prior to this.
Have you checked out the fuel filter? A 99 silverado fuel pump is fuel filter/fuel pump all in 1. Talk about swearing my head off n
I think on my 96 the fuel filter was under the passenger side along the frame.
Is the tank plastic or steel. Could the screen be blocked by a rust flake.
On my 99 silverado my fuel pump lasted for 250k. It whined for about 50000 so it gave me ample warning.
I thought you meant the Dodge.
That era chebby usually uses the oil pressure switch AND relay to run the fuel pump.
The computer primes the pump with the relay, then the oil pressure switch continues to hold power to the pump once it's running.
Long story short, try the starter fluid and or cranking it for ~20 seconds, enough to build up oil pressure.
The computer primes the pump with the relay, then the oil pressure switch continues to hold power to the pump once it's running.
Long story short, try the starter fluid and or cranking it for ~20 seconds, enough to build up oil pressure.
Banging on the tank is an accepted way to ck the pump. Since it quit after you disconnected the battery id look for an alarm system thats tied into the pump.
Originally Posted By: Clevy
Have you checked out the fuel filter? A 99 silverado fuel pump is fuel filter/fuel pump all in 1. Talk about swearing my head off n
I think on my 96 the fuel filter was under the passenger side along the frame.
A '99 should have an inline filter. I think it was around '03 or '04 that they did away with the externally mounted filter.
Either way, fuel injected GM trucks are notorious for burning up fuel pumps. It's almost an expected expense over the lifetime of the truck. Odds are this isn't the first one it has had, and most aftermarket ones aren't great either. If they put in an Airtex or Spectra a few years ago it's entirely possible it is burnt up again now.
Have you checked out the fuel filter? A 99 silverado fuel pump is fuel filter/fuel pump all in 1. Talk about swearing my head off n
I think on my 96 the fuel filter was under the passenger side along the frame.
A '99 should have an inline filter. I think it was around '03 or '04 that they did away with the externally mounted filter.
Either way, fuel injected GM trucks are notorious for burning up fuel pumps. It's almost an expected expense over the lifetime of the truck. Odds are this isn't the first one it has had, and most aftermarket ones aren't great either. If they put in an Airtex or Spectra a few years ago it's entirely possible it is burnt up again now.
Originally Posted By: 01rangerxl
Originally Posted By: Clevy
Have you checked out the fuel filter? A 99 silverado fuel pump is fuel filter/fuel pump all in 1. Talk about swearing my head off n
I think on my 96 the fuel filter was under the passenger side along the frame.
A '99 should have an inline filter. I think it was around '03 or '04 that they did away with the externally mounted filter.
Either way, fuel injected GM trucks are notorious for burning up fuel pumps. It's almost an expected expense over the lifetime of the truck. Odds are this isn't the first one it has had, and most aftermarket ones aren't great either. If they put in an Airtex or Spectra a few years ago it's entirely possible it is burnt up again now.
Nope. 99 was the filter in pump combo,then in 2000-2004 they were externally mounted again.
I changed it myself so I'm absolutely positive that my 99 silverado had a pump/filter.
Your 100% correct about Chevy burning up fuel pumps in the trucks. A chev/gm truck of my vintage uses gasoline to cool the pump,so driving around with 1/8 or less of fuel prematurely ages the pumps and cooks them.
My 99 will never have less than 1/4 tank ever again. I've got 80k on the latest pump and no whine yet,but never ran it lower than 1/4 either since either.
Originally Posted By: Clevy
Have you checked out the fuel filter? A 99 silverado fuel pump is fuel filter/fuel pump all in 1. Talk about swearing my head off n
I think on my 96 the fuel filter was under the passenger side along the frame.
A '99 should have an inline filter. I think it was around '03 or '04 that they did away with the externally mounted filter.
Either way, fuel injected GM trucks are notorious for burning up fuel pumps. It's almost an expected expense over the lifetime of the truck. Odds are this isn't the first one it has had, and most aftermarket ones aren't great either. If they put in an Airtex or Spectra a few years ago it's entirely possible it is burnt up again now.
Nope. 99 was the filter in pump combo,then in 2000-2004 they were externally mounted again.
I changed it myself so I'm absolutely positive that my 99 silverado had a pump/filter.
Your 100% correct about Chevy burning up fuel pumps in the trucks. A chev/gm truck of my vintage uses gasoline to cool the pump,so driving around with 1/8 or less of fuel prematurely ages the pumps and cooks them.
My 99 will never have less than 1/4 tank ever again. I've got 80k on the latest pump and no whine yet,but never ran it lower than 1/4 either since either.
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Weird, I did not know they first tried that in '99. I knew for sure I had changed external fuel filters on GMT800s before.
I wonder what prompted them to try it in '99, then go right back to the inline one in '00.
I wonder what prompted them to try it in '99, then go right back to the inline one in '00.
we can guess all day.. Check the fuel pressure first and go from there
I did the fuel pump in my 93 Suburban 3 times.
You may need to use PB Blaster on the fuel line connections to get them undone without snapping the lines on the fuel sender assembly.
Use an AC-Delco pump.
Use a new sock with the new fuel pump.
Glad I sold the Suburban. I hated doing the fuel pump.
You may need to use PB Blaster on the fuel line connections to get them undone without snapping the lines on the fuel sender assembly.
Use an AC-Delco pump.
Use a new sock with the new fuel pump.
Glad I sold the Suburban. I hated doing the fuel pump.
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