Question about 1999 Chevrolet Tahoe

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Fuel gauge reads correct but needle is fluttering

Just replaced fuel pump and installed newer pump and harness

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  • bubbanloisn2 Mar 01, 2009




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Usualy the gage needs to be recalabrated or the gauge just went bad ... i have had that happen a few times on the replacement of fuel pumps . usuale they calabrate back

Posted on Feb 17, 2009


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I have a 95 jeep cherokee the gas needle doesnt read. can you tell me how i can fix the problem

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I have a 1997 Chevy Blazer LS, the fuel gauge constantly fluctuates. Usually when I first turn it on the gauge will indicate more gas than is actually in the tank. Slowly as the car is running I see the...

all later model chevy vehicles are plagued with this problem it,s the fuel level sensor mounted on the fuel pump module inside fuel tank unfortunately on some models it,s only available with purchase of whole new fuel pump module that can run as much as $500.00 dollars for just the module not including labor to drop fuel tank and replace I encourage you not to waste time and money with aftermarket less expensive pump module assemblies not to knock any parts people but our shop just installed the 3rd napa fuel pump module in a 98 blazer because the new pump will not read correct amount of fuel finally it was replaced by a pump module assemblie from dealership at cost of $458.00 for pump it now reads correct hope this helps if you need more detailed instructions on how to replace repost at fix ya thanks

Apr 04, 2010 | 1997 Chevrolet Blazer

1 Answer

2000 Chevy blazer this is the 2nd brand new fuel pump I've replaced in 2 weeks,It runs a hour or two, Then sitting all night won't work in the morning.Same thing the first time . I've checked fuse ,...

Spark......EQUIPMENT NEEDED: 1) fuel pressure Gage....Advanced Auto = $45..... 2) needle nose pliers ( fuse pull )..
There is a fuel pressure access valve located on the fuel injector rail. The access port or "shraider" valve has a black or gray screw on cap. Remove the cap and you will see the valve. CAUTION: The fuel rail is under pressure....before installing the pressure gauge, relieve pressure by starting the engine and removing the fuel pump fuse from the under hood fuse box......
Once the engine quits, turn the key to the off position and safely install the pressure gauge. Put a rag around or under the access valve to catch any drizzling fuel. I always prefer to do this when the engine is cool.
Install the pressure gauge, start the engine, check for leaks and read pressure output at idle, record pressure reading.
Also, it should be checked under load but you will need another person to help.
Once you have shut the vehicle off watch the pressure gauge, it should remain steady and not leak down.
Let me know what the readings are.

Feb 13, 2009 | 2000 Chevrolet Blazer

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