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  #1  
Old 08-23-2025, 04:05 PM
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Join Date: Nov 2016
Posts: 21
86 560SEL starts then stalls

The car will start very quickly you barely have to let it turn it fires right up. Idle will go to ~1200rpms for 3-4 seconds and it stalls. Giving it gas will not keep it going. The pumps seem to be getting gas to the distributor i opened up the main intake line and it pours out. So i am losing either spark or fuel in those few seconds. Where would i start to figure out the problem?

The car has been sitting for close to 4-5 years. I was fixing a separate problem and had to put it away getting back to it now. Before putting it away i had changed

fuel pumps
fuel pump relay
fuel filter
fuel accumulator
distributor cap/wires
plugs
coil

among a few other things but its been so long i just assume its all broke again for testing purposed. Before i put it up it did run i just had problems with acceleration.

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  #2  
Old 08-24-2025, 11:36 AM
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Join Date: Feb 2011
Location: Modesto CA
Posts: 4,357
Test the functioning of the fuel pump relay by removing the relay and bridging sockets 7&8 in the relay base. The pumps will run continuously. Start engine. Does it stay running?

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