It could be that your choke on the carb is not staying open.Once the engine heats up depends. if late model you could have a faulty sensor sensor opens up as it gets warmer. it could also be a number of reasons, like a faulty MAP and/or MAT sensor, faulty ECU/ECM, or your TPS. check the choke -----
Answer I agree about checking the choke and the other sensors, but I think something else is happening. You should also check your exhaust system: a partly plugged cat convertor or a crimped/bent tailpipe can slowly produce enough back pressure to stall an engine.
One other thing: my son's 305 had a quadrajet with the fuel filter inside the fitting at the carb: it would slowly clog up, then as the particles fell off, it would eventually restart. Remove the filter there, and use an external inline one!
Answer Everything happening here to your 305 has happened to me on my 83 Silverado. I went up and down checking and replacing all of the above mentioned. As it turned out there was a combination of problems causing the stalling. First, the ignition module was failing, as the truck ran and heated up the module would shut the truck down.. once the truck cooled off, ran normal for another 30-45 minutes. Second, to avoid ruining a new module I replaced the coil at the same time, and capacitor just for peace of mind.. while I was under the cap I also cleaned all the corrosion and rust from the ground as to avoid ever having to pop it off due to a "no spark" issue. This helped me tons until the truck started starving for fuel.... I replaced both fuel filters, the one located in the carb and one external in-line, additionally I replaced the fuel pump and pump push rod (again for peace of mind since they're so cheap.. why not?)... my end result - Carb Problems. Ha! Adjusted carb, gone. Truck Runs Great.. hope this helps you.
check your crank sensor it might need to be adjusted or replaced
The crankshaft sensor is critical to the operation of the engine as it supplies information to the engine management computer. It senses both crankshaft position and engine RPM. If the sensor is defective, or improperly adjusted, then the computer cannot receive the proper signals, and can't keep the engine running.
no no no my crank sensor when out on my truck ar 95k now i have 125k and she is still running good
The throttle position sensor determines the amount of throttle used when the engine is running at various speeds. If the sensor is faulty, it can be replaced by ordering a new part.
Check ur cps sensor
CHECK FUEL PUMP REGULATOR, I HAD THE SAME.
it might be because the idle is low turn your idle up and it should stay running
take it to a mechanic. they'll know. I AM LINK....!
mine did that and i replaced the crank shaft sensor,problem was fixed
Just had this problem. I replaced the oxygen sensor and it appears to be running fine.
probably misaligned your crank sensor.. I'm dealing with the same problem, might need to replace with new and make sure to gap properly.
may not have been problem. remember you have a camshaft sensor, crankshaft sensor but most importantly the timing belt alignment .if it is worn or jumped a tooth will give same problem.Let me know what you have done to determine it is the cam shaft that needed to be replaced ?
you will have to replace the trottle possitioning sensor (TPS) THIS WILL SOLVE YOU PROBLEM
cold start sensor or weak fuel pump
It is either mis-adjusted or broken.
I spent over an hour trying to loosen the one bolt that holds the speed sensor in place. Finally I removed the exhaust pipes and had it replaced in five minutes.
I have a 2000 VW Beetle 2.0 and it was the engine speed or crank sensor. The symptom was, I would be driving or idling and the engine would quit. I used my OBD scan tool and it showed the code and the sensor was replaced. The part cost was $125.
The temperature sensor for your cooling fan may need to be changed. The temperature sensor wiring may need to be cleaned or replaced.
the iat sensor is located on the tube running from the air cleaner the sensor has a wire connector running to it
Faulty sensor get it replaced if not check to make sure wire isn't shorting out
When a tire pressure sensor has been replaced, the WIN will learn and store the sensor ID when the vehicle is driven continuously above 15 mph for 10 minutes.
mine did the same thing i replaced the crank sensor and it runs fine
after driving it for fifteen minutes it turns back on
check the MAF - Mass Air Flow Sensor
There are two separate sensors that play here. the "coolant temperature sensor" and "coolant LEVEL sensor". I suggest confirming which of these was replaced, as it is very common for them to be confused. likely you will find the coolant sensor that was replaced was the one on the engine (temperature); The LEVEL sensor is mounted either in the coolant resivoir or in the radiator. Probably just need the proper sensor replaced.