90 fuel filter
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1st Gear
Joined: Jun 2011
Posts: 1
Likes: 0
90 fuel filter
90 vet ran out of gas coming from winter storage , dumped gas in tank, ran great for four minutes then when hitting the gas pedal popping noises and no power. garage replaced fuel filter. ran great for ten minutes then died out again. Managed to limp it home very slow. Will the tank need dropped to replace fuel pump or any other easier things to check first?
Ok, new pump and filter replaced and still running poorly at high speeds. It is missing. My mechanic is looking at the injectors now. Any suggestions anyone?
Ok, new pump and filter replaced and still running poorly at high speeds. It is missing. My mechanic is looking at the injectors now. Any suggestions anyone?
Last edited by derfy; Jul 15, 2011 at 12:46 AM. Reason: update
Safety Car
Joined: Jul 2006
Posts: 3,696
Likes: 1
From: MA
90 vet ran out of gas coming from winter storage , dumped gas in tank, ran great for four minutes then when hitting the gas pedal popping noises and no power. garage replaced fuel filter. ran great for ten minutes then died out again. Managed to limp it home very slow. Will the tank need dropped to replace fuel pump or any other easier things to check first?
FP is very easy on the C4.
Comes out right where you fill the tank.
Under plastic cover ( 2 torx screws remove it) is all the bolts to remove the fuel hat with FP.
1 hour job tops
Burning Brakes
Joined: Aug 2010
Posts: 833
Likes: 1
It most likely is a bad pump. I can't tell you how many c4's I've seen that have run dry and the pump goes bad. It's extremely easy to replace the fuel pump on these corvettes. You need to remove the fuel filler door and cap, there are 4 torx screws that hold this on. Remove the rubber neck around the cap. (This is very old and will probably break) Remove the three rubber hoses on top of sending unit, and unscrew the ten bolts. Lift it straight up, and the filter and sending unit comes right out. I had to do this twice, because I got a bad one right out of the box. Don't get stuff made in China.
Safety Car
Joined: Jul 2006
Posts: 3,696
Likes: 1
From: MA
It most likely is a bad pump. I can't tell you how many c4's I've seen that have run dry and the pump goes bad. It's extremely easy to replace the fuel pump on these corvettes. You need to remove the fuel filler door and cap, there are 4 torx screws that hold this on. Remove the rubber neck around the cap. (This is very old and will probably break) Remove the three rubber hoses on top of sending unit, and unscrew the ten bolts. Lift it straight up, and the filter and sending unit comes right out. I had to do this twice, because I got a bad one right out of the box. Don't get stuff made in China.
Explain well, I know its very easy.One of the easiest electronic FP I ever did
Team Owner
Joined: Jul 2004
Posts: 28,414
Likes: 3,270
From: Hartford WI
IF there was that much heat, don't you think it would be a fire hazard to keep a heat producing thing in the gas tank? But lets say that it is not a fire hazard. Ask yourself this. "What happens when you run out of fuel?". I don't know about other cars but all of mine stop when the fuel is out. So, what happens to the fuel pump? AFAIK, when the motor stops, so does the fuel pump or you could be having an accident and it still spew fuel all over. When you turn the key to "run" it pressurizes the line for a few seconds and STOPS.
When fuel goes thru it, don't you take conduction into consideration that the fuel cools the pump?
Le Mans Master
Joined: Feb 2000
Posts: 9,060
Likes: 214
From: Epping NH
I can't count how many times I have heard those old wives tales. If that were so, I'd have owned 200+ pumps by today. I run my car down to E and more before I fill. All my vehicles.
IF there was that much heat, don't you think it would be a fire hazard to keep a heat producing thing in the gas tank? But lets say that it is not a fire hazard. Ask yourself this. "What happens when you run out of fuel?". I don't know about other cars but all of mine stop when the fuel is out. So, what happens to the fuel pump? AFAIK, when the motor stops, so does the fuel pump or you could be having an accident and it still spew fuel all over. When you turn the key to "run" it pressurizes the line for a few seconds and STOPS.
When fuel goes thru it, don't you take conduction into consideration that the fuel cools the pump?
IF there was that much heat, don't you think it would be a fire hazard to keep a heat producing thing in the gas tank? But lets say that it is not a fire hazard. Ask yourself this. "What happens when you run out of fuel?". I don't know about other cars but all of mine stop when the fuel is out. So, what happens to the fuel pump? AFAIK, when the motor stops, so does the fuel pump or you could be having an accident and it still spew fuel all over. When you turn the key to "run" it pressurizes the line for a few seconds and STOPS.
When fuel goes thru it, don't you take conduction into consideration that the fuel cools the pump?
Last edited by bac22; Jun 8, 2011 at 03:25 PM.
Team Owner
Joined: Jul 2004
Posts: 28,414
Likes: 3,270
From: Hartford WI
Oh brother...I suggest you review the following http://en.wikipedia.org/wiki/Fuel_pump.
Additionally just about every mechanic I know strongly recommends filling around 1/4 just to stop from pulling all the crap in the fuel tank through the lines. Sure you have a fuel filter, but as it get clogs the fuel pump has to work harder and that in itself can lead to it burning out.
Additionally just about every mechanic I know strongly recommends filling around 1/4 just to stop from pulling all the crap in the fuel tank through the lines. Sure you have a fuel filter, but as it get clogs the fuel pump has to work harder and that in itself can lead to it burning out.
There are 2 filters. One in the tank (sock) and one between the pump and the engine. One would assume the sock is the larger particle one and the other for finer stuff before the injectors. I also have a lot of mechanics that say if you flush the trans and it hasn't been flushed before, it will dissolve the sludge and the trans fails or that there are "friction particles" from the clutch that gets washed out and the trans fails. Not one bit of science though.
Lets say there is crud in the tank, how does a full tank help? If you have a baffle around the tank, it will keep the crud in the "circle" within the circle. Even if you have a full tank, the crud will get sucked into the sock since it is sloshing around and will eventually get into the baffle area where it will be hard to leave because of the vacuum from the pump
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Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
I agree with old wive's tale bit, but the OP should check pressure first to make sure he needs a pump. He might also, since he put in a new filter in it, remove and flush which is simply a matter of attaching a hose and putting one end in a coffee can and then turning the key on - no restrictions should squirt maybe a quart. You could also let what you get out sit to make sure there isn't any water in it which for a car that sits, particularly if it wasn't full, might be a problem.
Team Owner
Joined: Jul 2004
Posts: 28,414
Likes: 3,270
From: Hartford WI
I agree with old wive's tale bit, but the OP should check pressure first to make sure he needs a pump. He might also, since he put in a new filter in it, remove and flush which is simply a matter of attaching a hose and putting one end in a coffee can and then turning the key on - no restrictions should squirt maybe a quart. You could also let what you get out sit to make sure there isn't any water in it which for a car that sits, particularly if it wasn't full, might be a problem.
1. He'd be able to see that the pump sock isn't clogged.
2. He'd be able to see if the fuel baffle and the tank isn't full of crud
3. He'd be able to test fuel pressure and then replace it if needs be
Team Owner
Joined: Jul 2004
Posts: 28,414
Likes: 3,270
From: Hartford WI
IF there is a lot of water, you should be able to see it at the bottom. If there isn't enough to see easily, dump 3 cans of "Gas Dry" in it and call it a day.