[Nathstx5]

Just the other day I had my cooling system pressure tested at a radiator specialists. He said that the leak was too hard for him to find, so he sent me to a mechanic next door. He found that a coolant hose from the engine to the turbo was leaking and vice versa. Had the replaced them both and a new feed nipple made.

NOW my car hesitates on full throttle after 4000 rpm. What the hell has he done.

He also installed a new thermostat and did a T-K cylinder test (see if i blew a head gasget or anything like that). All ok. Disconnected the battery for a while to reset the computer codes, and still the hesitation occurs!

What has HE done?

 

[anarchyx34]

Sounds like you're leaking boost. Likely beacuse he didnt re-attach the intercooler pipes correctly, or maybe the pipe going to the throttle body. Hell it might even be the turbo inlet pipe as well. Makes sure these are all on correctly and clamped tight.

 

[Nathstx5]

could the power problem have something to do with the oxygen sensor?

 

[bLodi]

I agree, sounds like you have a boost leak, my car has a leak on the tube from the turbo to bypass valve and it really is very hesitant on the high end, it won't rev above 5500 rpm. Could be the same problem because you have to remove that hose to get to the coolent hoses to the turbo, cause I had to replace those a month ago

 

[Nathstx5]

Changed the petrol filter yesterday and today i am going to get the spanners out and take a look, thanks for the feedback guys.
Spoke to my old reliable yet expensive mechanic yesterday, he seems to think it could be electrical. Will suss that out also.

Thanks guys.

P.S.
This is the best site on the http://www.

 

[Thunder18]

Make sure that he put in a genuine Mazda thermostat because it's a special dual stage thermostat that is not available at most auto parts stores