wastegate cycle

[graham1524]

On a datalog in tunerpro one "capture" shows almost 13 degrees of knock retard.

My question is throughout all of my datalogs my waste gate duty cycle is 99.61% no change at all it just stays at that. The truck shows knock whenever it should be entering boost but the turbo (psi) reading on tunerpro shows zero. Could that be related to the waste gate being shut (which according to my searches is the waste gate staying shut). What should I focus on trying to figure out whats wrong just seeing if the actuator moves and the solenoid is functioning correctly?

 

[BMFB]

Re: wastegate cycle

99% duty cycle means your waistgate is closed, attempting to make full boost. When I started tuning I preset it so that it was at 10%, just to get me in a safty zone, you shoul dbe able to just set it to run at a predetermained amount, but thats not really your problem. Id strange that your not reading any boost...are you able to read vacuum? if not, then its gotta be something to do with your map sensor ( first guess) either way, prolly something along those lines, whats your set up?

 

[Quickstop [UK]]

Re: wastegate cycle

Have you got external gauges?

 

[graham1524]

Re: wastegate cycle

99% duty cycle means your waistgate is closed, attempting to make full boost. When I started tuning I preset it so that it was at 10%, just to get me in a safty zone, you shoul dbe able to just set it to run at a predetermained amount, but thats not really your problem. Id strange that your not reading any boost...are you able to read vacuum? if not, then its gotta be something to do with your map sensor ( first guess) either way, prolly something along those lines, whats your set up?

It's a completely stock setup (to my knowledge). I just went back over the log and it is able to read vacuum mostly showing from about 15-20 but when the highest knock is shown the vacuum goes down to zero. It also shows code 45 which is a rich condition.

 

[WyoSyclone]

Re: wastegate cycle

It's a completely stock setup (to my knowledge). I just went back over the log and it is able to read vacuum mostly showing from about 15-20 but when the highest knock is shown the vacuum goes down to zero. It also shows code 45 which is a rich condition.

I would guess a possible map sensor issue.... I'd also take the wastegate rod loose and make sure the wastegate isn't frozen shut.

 

[BMFB]

Re: wastegate cycle

It's a completely stock setup (to my knowledge). I just went back over the log and it is able to read vacuum mostly showing from about 15-20 but when the highest knock is shown the vacuum goes down to zero. It also shows code 45 which is a rich condition.

Rich is strange...should go super lean if you were making boost that your ecm didnt compinsate for...