Does this pipe look split?
- Thread starter jbeez
- Start date
See if this helps you.
Here is your boost curve in 3rd gear. It takes a while for boost to build and is not crisp. It has a soft curve instead of ramping up fast. And look at the high RPM where you see the boost fall and at the same time your wastegate duty climbs fast because it's trying to get boost up to commanded and can't. And the more boost falls the more the ECU is trying to maintain boost.
The lines on the graph are RPM, Boost(MAP), wastegate duty.
Now here is a pic of a log doing the same kind of pull.
Boost stays flat even at high rpm. Builds quickly and sharply. And wastegate duty is constant and steadily rising slightly at high RPM...At your elevation it is easy to hold 14 psi..But in yours the bottom falls out and boost is dropping.
Here is your boost curve in 3rd gear. It takes a while for boost to build and is not crisp. It has a soft curve instead of ramping up fast. And look at the high RPM where you see the boost fall and at the same time your wastegate duty climbs fast because it's trying to get boost up to commanded and can't. And the more boost falls the more the ECU is trying to maintain boost.
The lines on the graph are RPM, Boost(MAP), wastegate duty.
Now here is a pic of a log doing the same kind of pull.
Boost stays flat even at high rpm. Builds quickly and sharply. And wastegate duty is constant and steadily rising slightly at high RPM...At your elevation it is easy to hold 14 psi..But in yours the bottom falls out and boost is dropping.
jbeez said:
Yes, that and the fact that your performance is not nearly as crisp as is could be....Your boost is a few pounds lower in the top end as well so that's not good...Although the car may feel better than stock so i'm not even sure you are actually feeling the effect of this problem....Kinda like you don't even know what you are missing because you never felt the full effect of the tune.
I just for the first time really visualized this with your post, now that I have a good one to compare to. I see the RPMS stop like they let off the gas pedal, and then and only then, the boost and wastegate duty cycle fall off.
On mine, the boost and wgdc drops like a rock and the rpms are still going because im still flooring it
On mine, the boost and wgdc drops like a rock and the rpms are still going because im still flooring it
Current status, shop foreman says graphs not useful because no throttle position sensor data shown, he can't tell if apples to apples. Also they can't replicate it, but also they are just driving it around the block, this condition happens when you're flooring it for a few seconds. I told them I would take them out on the highway to replicate it, they're going to ask the foreman if he would datalog it while I drive it on the highway to try and get this to happen again
update: even if that were logged it wouldn't help, they want me to come in tomorrow morning and get on it on the highway while their foreman datalogs with his laptop to see whats going on
update: even if that were logged it wouldn't help, they want me to come in tomorrow morning and get on it on the highway while their foreman datalogs with his laptop to see whats going on
SHOdded said:
I say doubtful. Typically nobody at a dealership are capable of reading datalogs...Much easier for them to keep changing parts until the problem is fixed.....They will fumble around with IDS and ponder over which PID's to log and then when they don't see a problem tell the customer there is nothing wrong.
And at lower boost levels the problem is much less pronounced from what I remember so if he says he is tuned they will likely say that's the problem.....And I normally would agree with that except this is easy to identify
When mechanics look at logs with IDS they are usually looking for clear cut basic data...With this problem you'd have to know the spool up, boost level, duty cycle characteristics and be familiar with the engine
And it's tricky because on a stock tune the boost level is variable in order to meet commanded torque levels that torque based tuning gives
Went to dealership. My service advisor didn't know what he was talking about, tech told me he's not allowed to datalog while i drive. But we still went out and he drove, i got to explain whats going on, show him. Express my concerns, and explain those graphs directly instead of through the service advisor. So hes supposed to go on a ride with another tech this afternoon, ford ids datalog, and then have ford look and see whats wrong....
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He was like, is the calibration stock? Yuppp and he went on to tell me how these tuners can say its untraceable but ford knows! I was like, all stock except that exhaust pipe you guys wouldn't cover under warranty and told me to get replaced...
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wastegate solenoid being replaced, hope this fixes it!
They don't have the part so I won't know until next week. I think they said they're going to replace one of the pipes too, i guess the one with the BOVs on it.
They said the solenoid unit was like half broken, one side was working and the other wasn't, so one turbo was overworking to makeup for the other one.
They don't have the part so I won't know until next week. I think they said they're going to replace one of the pipes too, i guess the one with the BOVs on it.
They said the solenoid unit was like half broken, one side was working and the other wasn't, so one turbo was overworking to makeup for the other one.
