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Waiting For The 2nd Tow In The Past 6 Hours

qws

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qws Enthusiast

qws

Posted
Posted

2002 sierra 1500 98k 4x4

 

Fuel was getting low this AM so I threw in a quick 20 bucks worth of gas. Ran fine for 40miles. Then it started to buck. Pulled to the side of the road. Idle is very sparatic then stalls out.

Got towed..... figured it must be bad gas. Threw in some drygas and it seemed to run fine. Drove 4 miles to get new gas put in and a half mile from the station...the bucking started again. Got it there, filled it up and threw in some injector cleaner. Pulled away from the pump to a parking spot and idle is once again sparatic and can't keep it running.

Put my scanner on it and NO codes are coming up.

TPS?

Fuel Filter?

 

Thanks guys

qws Enthusiast

qws

Posted
  • Author
Posted
Check filter fuel pressure regulator and fuel pump pressure

 

 

what is the fuel pressure suppose to be on these?

I'm assuming 43 psi but don't want to assume anything

qws Enthusiast

qws

Posted
  • Author
Posted

put a fuel gauge on the fuel rail and have 0 when turning on the key.

Replaced the fuel filter and still the same reading

 

Before I jump the gun an think its the fuel pump can anyone tell me where the fuel pump relay is and how to test?

Also read to look into my regulator?

Connections on top of the tank look clean and have good good contact from what I can see.

qualicas Enthusiast

qualicas

Posted
Posted

I'd say you got some water in the gas from the station. Go back to where you bought the gas, I'll bet there were a few other people with the same problem.

I used to be in the business of managing the maintenance for a large multinational company. Every underground gas tank will have a certain "heel" of water/sludge collecting in the bottom of the tank. When there got to be too much, I used to send in a pumper truck to suck it out. Normally, the water and sludge sit undisturbed in the bottom of the tank. The station pumps suck from maybe 6" from the tank bottom. However, when a tanker comes to drop in new fuel, it disturbs the bottom sediment and it swirls around and gets sucked up by the station pump and pumped into your truck.

Moral of this story, if you are pulling into a service station and you see a tank truck there, just keep on driving to the next station. Of course, the truck might have just pulled away and you could still get sediment. Or he could be dropping a different grade of fuel and you will still be okay. If the station is a mulinational brand, they will offer some compensation to you. The gas tank might have to be cleaned and fuel filter changed or just fuel filter changed a half dozen times until it is all out.

Usually fuel pumps either work or they don't so I wouldn't think that would be the problem.

nickvrebel Senior Enthusiast

nickvrebel

Posted
Posted

the fuel pump relay is located in the electrical panel on top of the driver side fender. fuel pumps in chevy trucks like to go out when you run the tanks low on gas, very common.

az'03Silverado Senior Enthusiast

az'03Silverado

Posted
Posted

Try smacking the bottom of your gas tank and see if it works then. (seriously). Sometimes it will make the pump work for a while until you can get to a shop for a permanent fix. At least it may get you off the side of the road.

c4cruiser Enthusiast

c4cruiser

Posted
Posted
Try smacking the bottom of your gas tank and see if it works then. (seriously). Sometimes it will make the pump work for a while until you can get to a shop for a permanent fix. At least it may get you off the side of the road.

 

 

Agreed!! Turn the ignition key to ON and then swat the underside of the tank with a 2x4 or baseball bat. It helps if somebody is in the truck to turn the engine over while you take out your frustration on the tank. That can get the fuel pump to start running for a short time.

 

Unfortunately, replacing the fuel pump is not a simple task.

Spurshot Senior Enthusiast

Spurshot

Posted
Posted

... and not changing the fuel filter at recommended intervals kills them too. (I have personal knowledge of this phenomena :sigh: )

desrtrat Senior Enthusiast

desrtrat

Posted
Posted

GM started putting the in tank filters on 04 and up when they went to the return less fuel system..some 04 flex fuel trucks still had a external fuel filter, so you may need to look..

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