97 Ford F-150 won’t start after 30 minutes of driving wait 30 minutes and start I’ll change the coil pack spark plugs wires
My car has 320000 miles.
My car has an automatic transmission.
If I understand correctly, you have already changed the coil packs which is a good first step as this is a common indicator based upon what you are describing. Other things that you may want to also check that are subject to this kind of heat cycling are things like fuel injectors, crankshaft position sensor, camshaft position sensor, which are all subject to heat cycling failure much like the ignition coil packs are. If you need further help with diagnosing your truck, please feel free to reach out to us here at YourMechanic as we are always here to help.
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A defective TCS or torque converter solenoid can also cause this issue. Low fuel pressure, dirty or defective fuel injectors, or broken fuel pump: The fuel pump is responsible for transferring fuel from the tank to the engine.
If a battery is low on energy, or if the connections are loose, your engine may be able to crank, but it may not start–or it may take several tries. Similarly, a starter motor that`s beginning to fail may still crank the engine, but won`t be powerful enough for it to start.
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If I understand correctly, you have already changed the coil packs which is a good first step as this is a common indicator based upon what you are describing. Other things that you may want to also check that are subject to this kind of heat cycling are things like fuel injectors, crankshaft position sensor, camshaft position sensor, which are all subject to heat cycling failure much like the ignition coil packs are. If you need further help with diagnosing your truck, please feel free to reach out to us here at YourMechanic as we are always here to help.
I would recommend having an expert from YourMechanic come to your location to take a look at the vehicle to first determine what the cause of the misfire is if this has not already been done. Engine misfires can be caused by many different problems and are generally caused by either a spark or fuel issue or in some cases, a combination of both. Spark related problems generally will result from things like ignition coils, crankshaft position sensor, spark plugs, spark plug wires or ignition modules not working properly. When the misfire results from a fuel related issue, this is commonly related to a lean fuel condition (lack of sufficient fuel supply to the motor). Fuel related misfires can be caused by many different things such as low fuel pressure, faulty or dirty fuel injectors, a faulty O2 sensor, a dirty or failing mass air-flow sensor, a faulty or dirty idle air control valve or a vacuum or intake leak. When the fuel supplied to the combustion chamber is insufficient, this results in an ignition (spark) that is igniting a less than balanced load of fuel and air. This results in a misfire or an explosion in the cylinder that is much less powerful than the other cylinders. This creates a loss of power that resonates throughout the motor additionally causing other problems with ignition and fuel timing. Due to the number of different things that may cause an engine misfire, the quickest and easiest way to diagnose this type of problem is to hook the vehicle up to a scanning tool which will download any potential fault codes that may have registered in the vehicle’s computer as a result of the poor running condition. I would recommend having an expert from YourMechanic come to your location to diagnose your misfiring problem.
Looks like you’re chasing an electrical gremlin here. First, the brand of spark plug may in some cases cause issues with starting. However, beyond brand is making sure it’s the right model and has the correct gap is more critical. The fact that you’re trying to start the car with throttle cleaner is a red flag. This method used to work really well with older, carburetor fueled systems, but with today’s fuel injected systems that are monitored by ECU’s, that typically causes a huge overload of energy, can fry the sensors and put you back to square one.
My advice here is to contact a certified mechanic and have them diagnose the starting problem you’re having, as by trying to fix it, the problems with the Grand Am may have gotten worse unfortunately.
Most of the time, when it’s extremely cold outside, the problem is with the battery and an inability to have enough cold cranking amps to activate the starter and other ancillary components that allow the vehicle’s ability to start. Although worn out spark plugs tend to impact the vehicle’s ability to start, they are usually not the source of cold starting problems. You might want to either replace your battery, or contact a professional mechanic to complete a car is hard to start inspection first; before you determine why your car is having difficulty starting.
