Hi Lads

 

Have some boosting issues and need help

 

 

so what i am experiencing is this:

variable charge pressure drop or increase when im driving,  like Im going for a drive , after 10 minutes im stop at the red light, and when am accelerate feel like its not pulls a same like before the red light 🧐😩same after a few minutes just stop cause a light or roundabout and pulls like a dream again so the presence of pressure is very different. not even !

Engine is fine!

Turbo totally ok,also actuator

Intercooler?

pipes are not the best but not that bad ,

EGR looks ok ,clean and close/open with no issue!

Vacum box not checked:cables are looks fine What else ?  n75?

guys need some help, so annyoing    🙂

Check for a vacuum leak, use a gauge not your eyes.

26 minutes ago, karatekutya10 said:

Intercooler?

Well, it may be heat soak (particularly if you have a remap). Try Swiss cheesing the right hand wheel arch liner behind the intercooler if a standard SMIC.

Coller pipe was checked , clips are hold but not the best but will check with vcds ,  so u  think may the cooler ?  standard SMIC , may cant get enough air , cold air ? 

36 minutes ago, karatekutya10 said:

Coller pipe was checked , clips are hold but not the best but will check with vcds ,  so u  think may the cooler ?  standard SMIC , may cant get enough air , cold air ? 

 

No, it's not a petrol engine, a diesel doesn't even need an intercooler to run.

 

Your car has a fault, check the vacuum supply from the tandem pump to the turbo unless your VNT is getting stuck, but you said the turbo is totally ok, so...

1 hour ago, sepulchrave said:

it's not a petrol engine, a diesel doesn't even need an intercooler to run

And neither does a petrol turbo. Do you have an actual point based in gas dynamics?

29 minutes ago, KenONeill said:

And neither does a petrol turbo. Do you have an actual point based in gas dynamics?

 

No, I'm trying to help the OP solve his problem not pass an IQ test.

Easy guys  thanks all the help , well today as i said we check pipes , all good , also  checked with vcds all normal  soo....hmmm  soo annyoing   what else ? turbo 2 months old so that is fine , soo strange cause if a leak somewhere, the boost is always need to bee bad i think , now in my case ofcourse is not that simple , sometimes very good for a week and no reason other few days a bit less boost , but no smoke , no higher fuel consumotion , for exmaple before i give it to my mechanic boost was fine ,throttle reaction was so smooth and sensitive , now i got it back and boost is slower , not that dynamic ...... f@ck seek other idea ? 

Actuator not adjusted correctly, you didn't say the turbo was replaced, adjusting the actuator setscrew on a new turbo requires logging and testing.

Quote

8 minutes ago, sepulchrave said:

Actuator not adjusted correctly, you didn't say the turbo was replaced, adjusting the actuator setscrew on a new turbo requires logging and testing.

 

Its a "professionally refurbed" from ITS Turbos , problem is , this boosting problem was the same before new turbo , i was just waiting for this problem to be resolved after the replacement  😞

19 hours ago, sepulchrave said:

Actuator not adjusted correctly, you didn't say the turbo was replaced, adjusting the actuator setscrew on a new turbo requires logging and testing.

Probably, but I suggest we both back out since the OP isn't sufficiently interested to give us all the relevant information about his problem.

2 hours ago, KenONeill said:

Probably, but I suggest we both back out since the OP isn't sufficiently interested to give us all the relevant information about his problem.

 

unfortunately I can’t say more, just what I wrote above 😞 :

Its a "professionally refurbed" from ITS Turbos , problem is , this boosting problem was the same before new turbo , i was just waiting for this problem to be resolved after the replacement

 

maybe one thing , car maybe mapped but no proof  we have a strong suspicion that it might be mapped  with a **** programme, English is not my native language, but I hope the point was understandable