You need a new AST it sounds like. And at the rate you're overheating, you may need a new engine soon too...

Check the 'Newbies' thread for info on the AST, or air separation tank, it's one of the first things you should replace when you get an FD.

As to the hesitation...i don't actually own an FD yet...so maybe someone else can help you with that

 

Definately check the AST (air seperation tank). It is located to the left of the battery and behind the intercooler. It is black plastic with a cap that says to never open. I would recommend doing a search for "ast" to find out all of the symptoms and where they tend to break.

 

The AST is the small plastic dealio attached to the driver's side of the stock intercooler. You're risking your new motor's health.....I recommend you get an aftermarket Water temp gauge asap. What mods do you have? Also, where do you live?

 

i thinky uo are adding coolant to the worng place, you have to add it to the filler cap(on the motor), not the overflow tank thing(white plastic on the left)

 

Only pic I could find, and this has the stock AST replaced with an aluminium one, but you get the idea. the stock tank is in the same location

 

yeah, you are supposed to fill put the coolant in the thermo housing cap, not the overflow, if you put it in the over flow, it will... overflow. I did the same thing on mine and ended up taking apart the whole wheel wellt to see where it was leaking. I found that they design a hole on top of the overflow tank so you cant overfill to to much so thats0 how i know.

 

Have you actually seen the hole?

My $0.02: You most likely have a hole or leak SOMEWHERE in your cooling system. If the system is not COMPLETELY PERFECTLY sealed, it drasically reduces the systems ability to function and cool properly. Now, the system consists of the radiator, of dubious quality, that can give a slow leak and eliminate the ability for the system to hold pressure; the AST mentioned above, the stock one being a total liability; the coolant caps, which shoud be as new as possible; the heater core, which I haven't run across as being leaky, and you would smell this in the car if it was; and fourteen coolant hoses, any of which can develop pinhole leaks that are very difficult to find. If you are losing coolant after some hard runs, what may be occuring is a leak somewhere eliminating the system's ability to pull coolant back into the engine as it cools (are your fans running like crazy? They should be if you are overheating as much as you say!). Check the entire coolant system, looking at iluvmyRX7.com for routing and locations.

I think the crazy vibrating in 1st and 2nd is wheel hop. STOP IT, you will destroy your rear end in short order.

Anyway, sure driving awful hard on a less than confident auto, no? Again, my $0.02, now worth half considering how long this post is and inflation and all...