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| 84 duke will not stay running (Page 1/2) |
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thecage
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JUN 30, 02:08 PM
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Ok what should I be looking at or testing next.
Car will start up cold and idle for a few minutes 2-5 without hesitation. Then just suddenly stall out, die. It sometimes starts up again but not always. Usually it will die and can't restart, does crank fine.
Fuel pressure is there and spark is at the plugs but injector is not firing when it dies and trying to crank.
Injector works fine and I see nice spray pattern when cold.
Tach is unplugged although was working before I unplugged it (would move 200-400rpm while cranking)
I have replaced
Distributor
ICM
Pickup coil
Cap, Rotor, wires, plugs
MAP
TPS
EGR
O2
Only thing left is coolant sensor or ECM.
Help!!!!
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fierosound
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JUN 30, 02:40 PM
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thecage
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JUN 30, 02:49 PM
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No codes, only the usual 12.
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Patrick
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JUN 30, 03:44 PM
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| quote | Originally posted by thecage:
Fuel pressure is there
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Seeing as how it's a whole lot more difficult to check fuel pressure on a duke as compared to a 2.8 V6... how are you testing the fuel pressure, and what is it?
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thecage
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JUN 30, 05:11 PM
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Using an Actron brass t-adapter in front of the fuel filter. Filter is brand new. Reads a steady 11-12psi even when engine dies.
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vette7584
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JUN 30, 05:25 PM
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i had an 84 that would do something similar, it wound up being the fuel pump relay on mine. i didnt see that you had mentioned that, try putting a new one in and see what you get, cheap and easy, if it works for you, even better. good luck
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thecage
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JUN 30, 05:34 PM
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Didn't change the fuel pump relay but swapped it with the AC one next to it. Same results.
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Patrick
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JUN 30, 06:08 PM
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| quote | Originally posted by thecage:
Using an Actron brass t-adapter in front of the fuel filter. Filter is brand new. Reads a steady 11-12psi even when engine dies.
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Okay, excellent. Not many people have/use that adapter.
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Patrick
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JUN 30, 06:14 PM
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| quote | Originally posted by thecage:
spark is at the plugs but injector is not firing when it dies and trying to crank.
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There is spark and there is SPARK. When your engine stalls out, are you able to see a healthy spark from any/all of the spark plug leads that will jump a quarter inch gap?
Another question regarding ignition... When you timed the ignition, did you have the ALDL jumper installed?[This message has been edited by Patrick (edited 06-30-2020).]
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thecage
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JUN 30, 07:15 PM
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Yes SPARK at all cylinders. Yes when I timed the engine it was with the AB shorted. 8.5deg
Like I said in my first post. Car starts when cold and runs perfect for 2-5 minutes before it stalls out. No stumble just dies.
When this happens I pull the air filter cover off when cranking and now fuel coming out of injector but nice even spray when running.
So weird
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