WHAT:
Vehicle either stalls / or nearly stalls at random times. Originally it would stall while slowing to a stop, it would drop to 200 rpm, surge up to 1200, and then free fall down to 0 and shut off. Other times it will do a near stall, and then do a loooong 200 to 1500 surge over and over for about 12 seconds.
WHEN:
This only occurs while the vehicle is at operating temperature. I have noticed that the weather beginning to cool down is slowing down the frequency of these stalls and surges. At first this only occured while slowing down. But now it also does it more.
-Slowing down but below 30mph foot off the throttle.
-While sitting in park in a random fashion.
-While sitting at a light in Drive.
While it is doing the surging, if I apply throttle it will rev higher but still cut out which just creates a longer heavier surge. HOWEVER if I really push it beyond 3000 rpm it will calm down and idle fine.
THINGS THAT HAVE BEEN REPLACED RECENTLY:
Throttle Position Sensor
NEW PCM
New Crankshaft Position Sensor
New Camshaft Position Sensor
New Relays
New Idle Air Control Valve
Battery has been tested and cleaned.
My father is a Ford Master Tech so we have been going at this for a while. There are times when it will be hard to get out of a subdivision because it's so bad. Then some days it won't do it at all.
Basically boiled it down to either a wiring problem or a bad new sensor. Thoughts and comments would be great. Based on the symptoms I don't personally feel it's a corroded wire or anything but I'm an idiot so what do I know. Thanks.
Vehicle either stalls / or nearly stalls at random times. Originally it would stall while slowing to a stop, it would drop to 200 rpm, surge up to 1200, and then free fall down to 0 and shut off. Other times it will do a near stall, and then do a loooong 200 to 1500 surge over and over for about 12 seconds.
WHEN:
This only occurs while the vehicle is at operating temperature. I have noticed that the weather beginning to cool down is slowing down the frequency of these stalls and surges. At first this only occured while slowing down. But now it also does it more.
-Slowing down but below 30mph foot off the throttle.
-While sitting in park in a random fashion.
-While sitting at a light in Drive.
While it is doing the surging, if I apply throttle it will rev higher but still cut out which just creates a longer heavier surge. HOWEVER if I really push it beyond 3000 rpm it will calm down and idle fine.
THINGS THAT HAVE BEEN REPLACED RECENTLY:
Throttle Position Sensor
NEW PCM
New Crankshaft Position Sensor
New Camshaft Position Sensor
New Relays
New Idle Air Control Valve
Battery has been tested and cleaned.
My father is a Ford Master Tech so we have been going at this for a while. There are times when it will be hard to get out of a subdivision because it's so bad. Then some days it won't do it at all.
Basically boiled it down to either a wiring problem or a bad new sensor. Thoughts and comments would be great. Based on the symptoms I don't personally feel it's a corroded wire or anything but I'm an idiot so what do I know. Thanks.