4.3 gl cranks but won't start

Luisma82

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Joined
Jul 13, 2019
Messages
6
Hi, I have an issue with this engine. It won't start it self.
I tested the fuel pump connecting it straight to 12v and it worked but not energetically. I tested too the conection and it had power only while is cranking. I poured some gas in the carb, the engine started and run just fine. I disconnected the fuel pump while the engine was running and it stopped after a couple of minutes.
Thanks a lot for the comments...
 

alldodge

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Mar 8, 2009
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40,582
Don't know which GL

but not energetically
Don't know what this means

I tested too the connection and it had power only while is cranking. I poured some gas in the carb, the engine started and run just fine.

It had power to the pump but would only start with pouring gas down the carb, then it ran fine. This doesn't add up, so maybe I'm missing something.

Maybe it doesn't get gas when cranking, but once started it then runs fine? maybe?

If the above is correct, then check the start diode

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Luisma82

Cadet
Joined
Jul 13, 2019
Messages
6
"but not energetically" I meant that i can hear pump working but it seems like tired. It doesn't spins too fast.
"Maybe it doesn't get gas when cranking, but once started it then runs fine? maybe?"
That's exactly what is happening I'll check the start diode (If I can find it🤔)
thanks again..
 

alldodge

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40,582
Put a voltmeter on the relay and see if you see 12V when cranking, if not look for the diode
 
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