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Thread: 2002 Chev Avalanche no Start

  1. #1
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    2002 Chev Avalanche no Start

    I've been without my truck for a few weeks and thought I had a solution but no.

    2002 Cev Avalanche
    5.3l
    I was getting a Fuel System Running Lean Code and one day it wouldn't start. I had no fuel pressure at the engine during prime and startup so I replaced the pump.

    Today...Still nothing. Relay has been tested and switched with a know good one. Fuse is good.

    Any help?
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    Is your fuel filter plugged?

  3. #3
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    I don't even hear the pump on prime. I should as it is complete exposed to the interior at the moment

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    Does your fuel guage read tank level? That would indicate that the sending unit is at least plugged in and has a complete circut, I'd be tracing that wire harness looking for nicks / pinch / cut wire or corrosion in the wire. Find the closest ground wire (at frame) and clean it.

    Old Chevy trick: To check the sending unit (or even get you off the side of the road), leave key on and beat the bottom of the tank with a Soft-blow hammer. If the pump starts with that, its toast or on its way out but it will run. I had mine last an extra week by doing this.
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    Retread #19

  5. #5
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    Pump does prime, it just is quite. Just checked.

    I have a filter just haven't put it in yet. If thats the case that would have to be one hell of a clogger filter.

    Oh and the old pump was shot. Connect it directly to 12v and nothing happens.

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    Crack a fuel line at the rail and make sure you have fuel there. After that you'll have to test for pressure.

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    Well the rail has the test port and I get nothing out of there.

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    dumb question time....enough gas in the tank?

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    Not a dumb question. I'd be dumb if the isn't. So yes approx. 110L in the tank.

    I'll swap filters tonight is it's still not storming after work. I just think that it would never get that clogged to give little to no pressure at the rail.

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    If there is no fuel at the rail it maybe an issue in the tank. On an Impala SS I owned there was a hose that burst between the in-tank fuel pump and the sending unit at the top of the tank. I also had the fuel pump power wire inside the tank on a Caprice melt....
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  11. #11
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    Well I had the entire sending unit apart. I went cheap and only replace the pump vs. the whole 415.00 sending unit as the pump was the only problem. So the hoses and filter are new in the tank.

    But I didn't think of the line popping off as they are only press on hoses. There is no room for a regular hose clamp if that is the case, but maybe a hogring style.

    Thanks for that idea Tank.

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    It was the line in the tank. The new line that came with the pump didn't press on quite tight enough so I just wrestled in some hose clamps on each end and away it went.

    Tank wins the free cookie!


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