Alright I have a 97 f150 v6 5spd 4x4 i bought about a month ago. I like it but it's has some problems since i got it. The first one is how most of the time when i start it it'll barely crank and when it starts, it will run rough for a few seconds then smooth out. Usually when it's cold. My other problem is when i go to stop, and I'm on the brakes pretty hard, the rear brakes will let go and then lock up on me. Thanks

 

Also i had a thread on the first problem like a month ago and they said to spray a fuel injection system cleaner up into the intake because the IAC valve may be gummed up or something like that. Is that it or could it be something else? And what cleaner would you recommend? Thanks.

 

For the slow cranking I would start with the battery and alternator. Have them checked, if they check out, then I would look at the starter and the wiring. One or more of those components could cause slow cranking.

The rear brakes could be several things, you need to pull the drums off and inspect them.