Check engine on and off

You 'all kinda lucky Ole CC will go out there and take pics for you all....

I dont know you all that well..............................

 

Starting running good for a few days then back to having issues. It has to be electrical. When the check engine light comes on the AC will stop blowing cold. Then when it goes off the AC will blow cold again. Any suggestions?

 

After all this time, I finally figured out the problem. It was a dirty mass air flow sensor. I took apart everything and the sensor had some kind of oily nasty stuff on the sensor. I cleaned it off and the connections with contact cleaner and it's ran good ever since

 

After 4 days of running fine, we had a bunch of rain and all of a sudden the problems came back.

 

Part of the strategy of OBDII is to store data that caused the CEL to illuminate, it is called freeze frame data. You will need to examine this as a starting point in order to diagnose this. This is done by using a scan tool.

 

The scan tool will not connect when the check engine light comes on. Once the light goes off it connects but it doesn't throw me any codes. Previously however it did throw me a couple such as air temperature sensor, camshaft sensor, and igniter circuit malfunction. But the truck is going into limp mode. It bogs down and won't allow it to go over to 2 to 3,000 RPM. As soon as the like goes off power is restored and it runs fine. There are times where it comes and goes. Like on for 2 seconds off on for one second off. Been times were it stays on for the whole trip. And what's weird is it seems like when I go up a hill it goes off or when I come down a hill to a stop it'll go off

 

If you plan on fixing this yourself you are going to have to get a better scan tool... what is your current scan tool? The other option is to find an O'Reillys and they will scan it for you, if the CEL is on and their tool wont connect then that needs to be figured out too.

 

We've tried 5 different scan tools. All the way from a cheap one to a Mac tools and snap on..

 

Something else to add, it once my gas tank gets to a quarter of a tank and below it never messes up.