decepticon Posted January 29, 2015 Report Share Posted January 29, 2015 hello new to site ,I have a 82 720 king cab gas engine.truck starts an runs great for about 10 minutes then seems to cut out an stall almost like its running out of gas. replaced cap rotor plugs wires external fuel pump an filter .cant even go to store in it without it stalling sometimes start right up sometimes just crank over. any help would be so much appreciated thank u Quote Link to comment
datzenmike Posted January 29, 2015 Report Share Posted January 29, 2015 Several things happen about 10 minutes after starting the engine. As the engine warms to operating temp the choke turns off. The choke forces a rich mixture condition to help the running in cold weather and my mask a normally lean condition. When the choke shuts off, the engine runs lean and stalls. Possible causes.. Idle cut solenoid non operational. The idle cut shuts off fuel to the idle circuit when the key is off to help stop the engine and prevent dieseling. When on, it allows gas to the idle circuit for proper idling. The idle cut solenoid should make a soft clicking sound when the key is turned on off on off on off. It's located on the back of the carb and has a Red wire to it. This wire should have power only when the key is ON. Another is the valve lash changes with the expansion of hot metal. Check your valve lash and adjust them. 1 Quote Link to comment
RatVonDude Posted January 29, 2015 Report Share Posted January 29, 2015 Damn mike is good, try another carb if you can. Sounds like automatic choke bullshit Quote Link to comment
ericsb210 Posted January 29, 2015 Report Share Posted January 29, 2015 Check the float bowl for fuel level when rpm increased, If drops check for plugged fuel line. Quote Link to comment
datzenmike Posted January 30, 2015 Report Share Posted January 30, 2015 If it ran alright rich, with the choke on, it should run with it off. If the idle cut isn't working it's easier to fix this than replacing the carb. Idle cut solenoid non operational. The idle cut shuts off fuel to the idle circuit when the key is off to help stop the engine and prevent dieseling. When on, it allows gas to the idle circuit for proper idling. The idle cut solenoid should make a soft clicking sound when the key is turned on off on off on off. It's located on the back of the carb and has a Red wire to it. This wire should have power only when the key is ON. Another is the valve lash changes with the expansion of hot metal. Check your valve lash and adjust them. 1 Quote Link to comment
decepticon Posted January 31, 2015 Author Report Share Posted January 31, 2015 wow you guys are awesome thank you so much will try .I bought this truck for my boy an he just wants to drive it I wanna restore it thanks again will let u know how I make out Quote Link to comment
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