I have a 97 Blazer, the fuel pump was replaced approx. 1 year ago by my husband and brother. For awhile now when my gas gauge gets to 1/2 a tank, my car starts acting up, cuts out, jerks, etc. When I put more gas in the car it runs beautifully until it gets back down to the 1/2 way mark on the gas gauge. Does anyone have any ideas on what to do?????
Something else that I've noticed these past few days is that it does it when the car is warmed up, not when the engine is cool. Very frustrating. I can drive all morning and it will be ok, has the engine heats up, the problem starts up.

 

It sounds to me like the sender is off, causing the gauge to say it's at half a tank when it's really empty. My '96 used to do the same thing. If you know about how many miles you get per tank of gas, try resetting your trip odometer when you fill up the tank. This would give you a more accurate idea of when your tank is emptying.

The bad fuel gauge is a notorious problem in Blazers. Since the sender is in the pump, which is in the gas tank, it's not even worthwhile to most people to mess with it unless the pump itself is failing.

Now if your pump is dying again, that's another story. It shouldn't be dying after a year, but if you didn't buy an AC Delco, it is possible. A lot of knockoffs are poor quality. If you are concerned about this, have someone check the fuel pressure. This is very easy to do, if you have a fuel pressure gauge, available at many part stores.

 

I am constantly putting in gas, because I can't let it get to 1/2 a tank. I will have my husband check the fuel pressure. Thanks.

 

Sounds like a weak replacement pump. Most aftermarket brands are junk. AC Delco or Delphi have been found to be the most reliable. They do cost more, but given the labor involved with replacing them...

 

** Moving to 2n gen tech **

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