Hello!

So my Stilo JTD 115 hp got a clutch replacement but there is no boost. I don't know what happened in there but the car has no torque and I cannot even hear the turbo spooling. I checked the ECU but there are no errors or anything and I made a little graph. Hopefully you have some idea.

P.D. I haven't noticed any black smoke and the engine sounds and runs normal.



Thanks!

Have they knocked a pipe off the boost valve or forgotten to plug it back in. Not sure but they may have unplugged it and or removed the pipes when they took the gearbox off.
Strange not to have a light on or a fault code though.

im 99% sure that'll be a pipe off of some description. i dont know what values you should expect from the solenoid but desired and actual boost figures should be almost identical.

.7 BAR (10psi) is a huge boost leak/failure to spool... i believe the JTD has a VGT unit and if it does it seems to me almost like the turbo vanes arent coming round to spin the turbine sufficently to create boost... check the pipe work from the pressure cell on the turbo to the solenoid. also, as said, check all the boost side pipework

Hi!

So the mechanic said that some pipe going to the boost solenoid was disconnected, so everything was supposed to be fine... but it isn't. It's same as before:



Also I check the intake air quantity and the numbers are very low as well



Any ideas?

Thanks!

osvaldocm26 said:

Any ideas?

Click to expand...

Vacuum leak, hoses split, hoses loose/off, intercooler damaged, turbo vanes stuck, solenoid stuffed, turboactuator stuffed. I suppose it could possibly be throttle butterfly stuck closed or egr related to but you'd expect a maf error.

Visual check / mityvac / smoke test should rule out most causes if you're mechanic can't find it I wouldn't bother going back there.

Hey! So after a few visits to a couple of mechanics, spending lots of money without them fixing anything, I finally got two codes:

P0101 Air flow meter (invalid signal)
P0236 Overboost valve (low signal)

Any ideas? Thanks!

osvaldocm26 said:

Hey! So after a few visits to a couple of mechanics, spending lots of money without them fixing anything, I finally got two codes:

P0101 Air flow meter (invalid signal)
P0236 Overboost valve (low signal)

Any ideas? Thanks!

Click to expand...

double check the wiring cannot be swapped between the 2 x devices

varesecrazy said:

double check the wiring cannot be swapped between the 2 x devices

Click to expand...

So I checked the wiring but they have very different connectors so they couldn't be swapped, if that's what you meant...

I also cleaned MAF connector, MAP connector and the sensor itself and boost solenoid connector. At least the MAF fault has not reappeared... for now.

I tried to take some videos while checking the turbo actuator to show you guys how much it moves. Unfortunately I was alone so this is with engine off and moving it with a screwdriver. Will try to get someone to give it some revs later on.

The videos are pretty bad because as you know there isn't much space around there.

Quick overview of the actuator:



Moving the actuator:



Same thing, a little bit more of the lower part of the actuator can be seen here:



Are those paint marks in there normal or does it mean that someone has been fiddling around with the actuator and probably messed the factory setting?

Does the position of the adjuster look normal?

Hope someone can help because after a ABS problem I run out of money so no more mechanics for me...

Thanks!

(Forgot to mention that the same "Overboost valve" fault came up and apparently puts the car in some sort of limp mode with minimum power. The fault appears over 3000-3500 rpm. Amount of throttle doesn't make a difference.
After clearing the fault the "limp mode" is gone and the fault doesn't come back unless exceeding said rpm)

(Something else I forgot to mention is that I made those actuator test with multiecuscan. Tested the EGR valve and I could hear it moving and sounded good. Also tested the boost solenoid and I could hear it clicking... I guess that's good?)

Hello again!

So I checked the actuator while turning the engine on/off and also gave it some revs aaaaand... nothing. It does not move at all. I know that the actuator is not seized and I'm pretty sure the hoses are ok.

So what do you guys think? MAF? Boost solenoid?

I've got a 3000+ kms drive coming up in a couple of days. Can I drive the car with this problem or am I causing more damage?

Thanks!