Tooth Fairy
Away with the fairies.
T1N limp home problem solved.
Ive had this problem for a while, the Sprinter is not my daily drive but it was driving me nuts trying to figure out the problem.
Ive posted various thoughts about it on 2 other threads I started about the problem, see below.
https://sprinter-source.com/forums/showthread.php?t=37209
https://sprinter-source.com/forums/showthread.php?t=37870
It was very frustrating chasing down the problem I must say.
Thinking back it all started when I reinstalled the blower housing and reconnected the fresh air vent, the vent flap is powered from the vacuum source.
Now I know why it was disconnected in the first place, apart from the broken flap pivot
Today I went looking for the problem again.
Start with the basics Al, start with the basics.
Is there vacuum, yes, beauty, thats a start.
Is there vacuum to the turbo actuator, no, why not?
Check voltage to pressure converter, 12v, yes.
Check pressure converter coil for shorting, no, all good.
Ok, so it should all be working fine then, right?, wrong!!
So I checked the hose going to the vent flap, it seems ok.
I disconnected the flap hose at the T adapter that goes to the brake vacuum servo and plugged the T with a screw.
Started the Sprinter and applied the vacuum hose from the pressure converter to the turbo actuator, Eureka, the actuator pulled inwards as its supposed to do and the turbo came to life.
Put it all back together and went for a run around the block, bucket loads of power, and just a hint of black smoke, Im assuming the residual fuel will take a little while to burn through the system..
The vacuum T, small right hand hose goes to the door flap, left hose goes to the pressure converter.
The pressure converter lives underneath the air filter box, I have got so good at taking the filter box out that I can now do it in under 10 minutes....lol
Thanks also to this website for helping me understand things a little clearer too.
http://www.mercedes.gen.in/WP35/mercedes-sprinter-turbo-limp-home-los-diagnosis-fault-finding/
Edit:-
I did at one stage plug the end of the vacuum hose at the flap door end with no result, so obviously there is a hole in the 1M long vacuum hose to it, Ill replace it and see what happens.
Ive had this problem for a while, the Sprinter is not my daily drive but it was driving me nuts trying to figure out the problem.
Ive posted various thoughts about it on 2 other threads I started about the problem, see below.
https://sprinter-source.com/forums/showthread.php?t=37209
https://sprinter-source.com/forums/showthread.php?t=37870
It was very frustrating chasing down the problem I must say.
Thinking back it all started when I reinstalled the blower housing and reconnected the fresh air vent, the vent flap is powered from the vacuum source.
Now I know why it was disconnected in the first place, apart from the broken flap pivot
Today I went looking for the problem again.
Start with the basics Al, start with the basics.
Is there vacuum, yes, beauty, thats a start.
Is there vacuum to the turbo actuator, no, why not?
Check voltage to pressure converter, 12v, yes.
Check pressure converter coil for shorting, no, all good.
Ok, so it should all be working fine then, right?, wrong!!
So I checked the hose going to the vent flap, it seems ok.
I disconnected the flap hose at the T adapter that goes to the brake vacuum servo and plugged the T with a screw.
Started the Sprinter and applied the vacuum hose from the pressure converter to the turbo actuator, Eureka, the actuator pulled inwards as its supposed to do and the turbo came to life.
Put it all back together and went for a run around the block, bucket loads of power, and just a hint of black smoke, Im assuming the residual fuel will take a little while to burn through the system..
The vacuum T, small right hand hose goes to the door flap, left hose goes to the pressure converter.
The pressure converter lives underneath the air filter box, I have got so good at taking the filter box out that I can now do it in under 10 minutes....lol
Thanks also to this website for helping me understand things a little clearer too.
http://www.mercedes.gen.in/WP35/mercedes-sprinter-turbo-limp-home-los-diagnosis-fault-finding/
Edit:-
I did at one stage plug the end of the vacuum hose at the flap door end with no result, so obviously there is a hole in the 1M long vacuum hose to it, Ill replace it and see what happens.
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