1996 Silverado won't start
capriceforever
10-11-2008, 08:21 PM
Over the past few months my 96 Silverado (5.7L, 90000 miles) has gotten steadily harder to start. Sometimes 2 tries, than 3, than 4.... Finally a dozen tries and now it won't start at all. Truck runs great once its running, it just doesn't want to start.
Ignition system fine, good spark. When I take the air cleaner/intake off and pour an ounce of gas into the manifold, it fires up immediately and runs great. But if I let it sit more than an hr, it won't start. Have to pour gas down the intake.
When you put the key in the on position, you can hear the fuel pump start whirring for about 2 secs, than goes quiet, so fuel pump relay seems to be working. Has a new fuel filter.
Any thoughts here before I start wasting money? Much appreciated.
Ignition system fine, good spark. When I take the air cleaner/intake off and pour an ounce of gas into the manifold, it fires up immediately and runs great. But if I let it sit more than an hr, it won't start. Have to pour gas down the intake.
When you put the key in the on position, you can hear the fuel pump start whirring for about 2 secs, than goes quiet, so fuel pump relay seems to be working. Has a new fuel filter.
Any thoughts here before I start wasting money? Much appreciated.
j cAT
10-13-2008, 10:50 AM
Over the past few months my 96 Silverado (5.7L, 90000 miles) has gotten steadily harder to start. Sometimes 2 tries, than 3, than 4.... Finally a dozen tries and now it won't start at all. Truck runs great once its running, it just doesn't want to start.
Ignition system fine, good spark. When I take the air cleaner/intake off and pour an ounce of gas into the manifold, it fires up immediately and runs great. But if I let it sit more than an hr, it won't start. Have to pour gas down the intake.
When you put the key in the on position, you can hear the fuel pump start whirring for about 2 secs, than goes quiet, so fuel pump relay seems to be working. Has a new fuel filter.
Any thoughts here before I start wasting money? Much appreciated.
Once again if you read the posts listed here concerning this problem, you will quickly find your answer.
The fuel pump pressures are in need of measurement...60psi range.
the pressure must not drop more than 5psi over 5-10min.. if it drops rapidly the or low pressure ,,the pump is n/g. when replacing pump only use a OEM manufactured pump... others only work a short time...keep fuel level about 1/4 tank at all times...
many posts also give helpful info on how to do this..if it is the pump..
the regulator and the fuel lines should also be checked...as well as a plugged restricted fuel filter..
when did you last replace filter....good practice is every 30-40,ooomi...
good luck/...
Ignition system fine, good spark. When I take the air cleaner/intake off and pour an ounce of gas into the manifold, it fires up immediately and runs great. But if I let it sit more than an hr, it won't start. Have to pour gas down the intake.
When you put the key in the on position, you can hear the fuel pump start whirring for about 2 secs, than goes quiet, so fuel pump relay seems to be working. Has a new fuel filter.
Any thoughts here before I start wasting money? Much appreciated.
Once again if you read the posts listed here concerning this problem, you will quickly find your answer.
The fuel pump pressures are in need of measurement...60psi range.
the pressure must not drop more than 5psi over 5-10min.. if it drops rapidly the or low pressure ,,the pump is n/g. when replacing pump only use a OEM manufactured pump... others only work a short time...keep fuel level about 1/4 tank at all times...
many posts also give helpful info on how to do this..if it is the pump..
the regulator and the fuel lines should also be checked...as well as a plugged restricted fuel filter..
when did you last replace filter....good practice is every 30-40,ooomi...
good luck/...
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