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Old 06-07-2006, 11:16 PM   #1
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Default 88 no fuel or spark need help

i have an 88 bonneville with the 3800 engine and while driving it, it just quit at first i thought it was the fuel pump since i cannot hear it when you turn the key on but upon further inspection i have no fuel or spark. what could cause this is there anything i can troubleshoot to try?
car was running greta before this happened.
and the timing chain did not break it is still turning the cam.
would the crankshaft or camshaft sensor cause a no spark and no fuel problem?
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Old 06-08-2006, 01:05 AM   #2
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May have been a Crank Sensor failure...

The Crank sensor is used for both Spark pulse and fuel injector timming

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Old 06-08-2006, 06:45 AM   #3
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Lot'* of things could cause this. Start with the simple things like power to the ECM, ICM, ect.
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Old 06-08-2006, 07:34 AM   #4
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which wires do i test to check for power to the ecm?
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Old 06-08-2006, 10:09 AM   #5
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You need to start by checking the actual fuel pressure with a gage. The crank sensor does control the fuel at the injectors and the ignition, but it does not control the pump. Verify there is or is not fuel pressure to the rail. If you have sufficient pressure there then you just have an ignition problem. Then I would look at the crank sensor.
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Old 06-08-2006, 10:12 AM   #6
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He can check the fuel pressure, But he doesn't have spark...

kyle712

Kyle, when you turn on the ignition do you breifly hear the Fuel pump?

My 91'* fuel pump is very quiet...

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Old 06-08-2006, 08:53 PM   #7
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no i don't hear the pump at all and i could hear the pump before this happened

is there any way to test the wires going to the crank or cam sensors with a volt meter to see if it is at least getting a signal
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Old 06-09-2006, 12:10 PM   #8
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Default fuel

Check for fuel pressure at the schrader valve on the rail first. The pump may not be running because the rail is holding pressure. Just a possibility.
Then you could go onto electrical.
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Old 06-09-2006, 06:07 PM   #9
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i have done that and there is nothing at all in the fuel rail.
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Old 06-09-2006, 10:17 PM   #10
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does anyone know where the fuel pump relay is located i cannot find it at all
i found 2 relays on the firewall one is for the a/c and the other is for the heater fan, then i found 2 in front of the air filter box and they are both for the rad fan for high and low so does anyone know where to find the fuel pump one?
i still have no spark but i am trying to figure this out one step at a time.
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