My bronco has started hesitating when I mash the gas. Sometimes it picks right up but other times it remains sluggish for a ways. It is also shifting REALLY hard. Need some help with problem. Idle is fine. Shouldn't't matter but I let the battery almost die and it seems to have started or gotten worse since then.

 

Could be a variety of things from sensors to iginition parts needing to be replace to the EFI system needs to be cleaned

 

You need to check for codes before you do anything else. Look in the FAQ's section, you can do this yourself for free using a paperclip and counting the flashes of the CEL. I would recommend disconnecting your negative battery cable for a few minutes to clear all codes, then take it for a good test drive for awhile so we get the codes that really matter. I'm betting its going to be the VSS based on your description, but don't get tempted to just throw parts at the problem; you need those codes.

 

^ What he said, before anything, check codes. Get back to us with some more info, we will be more help then.

 

Can someone link me to a page to show how to pull the codes? And a list of codes please.

 

Go to your local auto zone or whatever. They usually do it for free.

You can do it manually but best to get the reader

 

Pulled codes before unhooking battery. Then decided to unhook and see if they were the same after. Now it is running fine. No signs at all. Wonder what gives???

 

Possible the battery played an important role in what this did .I would monitor it and pull the codes after u ran it for a while. Good luck TR