Bluebird 93 minimal problems

Well I have my problem ... I have a Nissan Bluebird 93 les After making complete refinement, the car was supplied and everything .. but when the bolt brake the car is turned off .. the mechanic told me that the IAC valve was not receiving signal from the ECU ... but that it had left it calibrad manually so that the car does not go out ... something that did only accelerate it !!! I recently checked my brake master and I was to ambign Jebes and those things ... and I did it .. but now follow the problem of fault ... I don't know if it will be any emptiness line ... maybe someone had this problem before u_u !!! I have been missing for months and I want to go out with my car more often and I can't u_u!

The problem is only by sudden braking or when stopping in any way?, with the car in relief if the same passes the same or just when walking?

Ghola and thanks for responding, well when the auth is still cold .. it is presented when brake sharply -... when you brake all normal ... when it passes from the car the car trembles too much and the minimum goes down too much but recovers ..... and when I floor and loose the brake several times parked the car ... the car ... the car ... the car is accelerated ...

That is not the engine problem is a gearbox problem, anyway what you can do is leave the engine a little more accelerated, so that this does not happen and once that the box dies complete you repairs it but if you accelerate it it kita.

Can it be a converter problem? If it is a problem of kja there is no drama my uncle is a specialist and I have another armed kja that repairs it shortly before buying the engine ... I will consult with my uncle, but thanks anyway .. What part of the kja do you think it can be?