I put my car onto a diagnostic machine
Discussion
I spent yesterday morning putting my car on a diagnostic machine and took some pictures just for interest. I thought I would post them here just for others that are curious like myself. I am surprised to see so much information available, especially the statistics for the type of recent driving. It was interesting to learn more on how my engine is, the sort of data the ECU contains (turbo pressure when cranking, anyone!?) and ensuring the DPF is happy.
Nothing else seems untoward.
I was hoping to get a clue as to why the car has such an average throttle response, but nothing jumped out at me. Typical wisdom might point to the EGR but no-one knows how to interpret the values presented.
Nothing else seems untoward.
I was hoping to get a clue as to why the car has such an average throttle response, but nothing jumped out at me. Typical wisdom might point to the EGR but no-one knows how to interpret the values presented.
A typical modern common rail diesel engine controller (the engine "ecu") will contain around 10,000 individually calibratable "constants" that control how the engine runs and around 5,000 "variables" that can be monitored. The EOBDII legislation demands that a small number of these are available (via the underdash J1962 socket) to any scantool that is used, but manufacturer specific tools can access all the available values (using CCP or XCP).
t thats 4380 psi!Thanks for reading.
It does seem really good. Connected straight away, takes power from the OBD port. I'm lucky to have access to it especially with a modern complex car.
Still, there were a few anomalies that concerned me. For example the screenshot showing a logged fault with the automatic gearbox reception - this car is a manual! And a setting under the suspension modes for 'Estate' or 'Saloon' that was set to Saloon even though this car is an estate. I can't decide if theses are errors in Autologic, errors in the car's settings from the factory, or just anomalies that I should ignore.
What I really hoped to find, though, was an explanation for poor throttle/turbo response. The turbo takes a full 2 seconds to achieve boost. Once the turbo comes in, there's plenty of power. It starts, runs, cruises normally, doesn't smoke and is economical. It can boost from well under 1500RPM. It's just laggy at higher RPM. It's actually quicker to build boost at low RPM, and the response is worse - extremely laggy - at higher RPM. Surely that' s the wrong way around!
It's not that noticeable to the boring casual driver. It could even be normal for this engine, maybe it's am emissions measure. In which case I will look into doing a remap. But my gut instinct, and experience of hundreds of other diesels, tells me it's not meant to be quite like this.
paul26982 said:
The Autologic is a good machine with great support
How did you know it was Autologic? I guess you know your screenshots.It does seem really good. Connected straight away, takes power from the OBD port. I'm lucky to have access to it especially with a modern complex car.
Still, there were a few anomalies that concerned me. For example the screenshot showing a logged fault with the automatic gearbox reception - this car is a manual! And a setting under the suspension modes for 'Estate' or 'Saloon' that was set to Saloon even though this car is an estate. I can't decide if theses are errors in Autologic, errors in the car's settings from the factory, or just anomalies that I should ignore.
What I really hoped to find, though, was an explanation for poor throttle/turbo response. The turbo takes a full 2 seconds to achieve boost. Once the turbo comes in, there's plenty of power. It starts, runs, cruises normally, doesn't smoke and is economical. It can boost from well under 1500RPM. It's just laggy at higher RPM. It's actually quicker to build boost at low RPM, and the response is worse - extremely laggy - at higher RPM. Surely that' s the wrong way around!
It's not that noticeable to the boring casual driver. It could even be normal for this engine, maybe it's am emissions measure. In which case I will look into doing a remap. But my gut instinct, and experience of hundreds of other diesels, tells me it's not meant to be quite like this.
Pentoman said:
Thanks for reading.
It does seem really good. Connected straight away, takes power from the OBD port. I'm lucky to have access to it especially with a modern complex car.
Still, there were a few anomalies that concerned me. For example the screenshot showing a logged fault with the automatic gearbox reception - this car is a manual! And a setting under the suspension modes for 'Estate' or 'Saloon' that was set to Saloon even though this car is an estate. I can't decide if theses are errors in Autologic, errors in the car's settings from the factory, or just anomalies that I should ignore.
What I really hoped to find, though, was an explanation for poor throttle/turbo response. The turbo takes a full 2 seconds to achieve boost. Once the turbo comes in, there's plenty of power. It starts, runs, cruises normally, doesn't smoke and is economical. It can boost from well under 1500RPM. It's just laggy at higher RPM. It's actually quicker to build boost at low RPM, and the response is worse - extremely laggy - at higher RPM. Surely that' s the wrong way around!
It's not that noticeable to the boring casual driver. It could even be normal for this engine, maybe it's am emissions measure. In which case I will look into doing a remap. But my gut instinct, and experience of hundreds of other diesels, tells me it's not meant to be quite like this.
The EGR valve "Target/Actual" position values look a little bit worrying! A "sticky" EGR valve could lead to a slow boost build up.paul26982 said:
The Autologic is a good machine with great support
How did you know it was Autologic? I guess you know your screenshots.It does seem really good. Connected straight away, takes power from the OBD port. I'm lucky to have access to it especially with a modern complex car.
Still, there were a few anomalies that concerned me. For example the screenshot showing a logged fault with the automatic gearbox reception - this car is a manual! And a setting under the suspension modes for 'Estate' or 'Saloon' that was set to Saloon even though this car is an estate. I can't decide if theses are errors in Autologic, errors in the car's settings from the factory, or just anomalies that I should ignore.
What I really hoped to find, though, was an explanation for poor throttle/turbo response. The turbo takes a full 2 seconds to achieve boost. Once the turbo comes in, there's plenty of power. It starts, runs, cruises normally, doesn't smoke and is economical. It can boost from well under 1500RPM. It's just laggy at higher RPM. It's actually quicker to build boost at low RPM, and the response is worse - extremely laggy - at higher RPM. Surely that' s the wrong way around!
It's not that noticeable to the boring casual driver. It could even be normal for this engine, maybe it's am emissions measure. In which case I will look into doing a remap. But my gut instinct, and experience of hundreds of other diesels, tells me it's not meant to be quite like this.
I'm a bit of a slow replier at the moment. Work keeps getting in the way :/.
While I was using this device, though, I wondered about the workshop. At the same time these were all being worked on:
Mercedes Vito - window mechanism broken apart
2007 Mitsubishi Colt - door handle cable snapped
Skoda Fabia - miscellaneous window or door surgery in progress
I was thinking to myself, "What the hell? Did they forget how to simple make doors and windows in modern cars??"
cptsideways said:
I see you have the standard issue VAG brake light switch problem 
I cannot believe they can't make a simple switch to last the life of the car. Utter crap in the 1980's Dacia Duster order of magnitude imho
This may have been because I applied brakes and throttle at the same time (I was curious on a very long and boring journey) and when I did so the, after a couple of seconds the dash warned me about an 'engine management fault'. So this one may be 'operator error'.I cannot believe they can't make a simple switch to last the life of the car. Utter crap in the 1980's Dacia Duster order of magnitude imho
While I was using this device, though, I wondered about the workshop. At the same time these were all being worked on:
Mercedes Vito - window mechanism broken apart
2007 Mitsubishi Colt - door handle cable snapped
Skoda Fabia - miscellaneous window or door surgery in progress
I was thinking to myself, "What the hell? Did they forget how to simple make doors and windows in modern cars??"
Max_Torque said:
Pentoman said:
Thanks for reading.
It does seem really good. Connected straight away, takes power from the OBD port. I'm lucky to have access to it especially with a modern complex car.
Still, there were a few anomalies that concerned me. For example the screenshot showing a logged fault with the automatic gearbox reception - this car is a manual! And a setting under the suspension modes for 'Estate' or 'Saloon' that was set to Saloon even though this car is an estate. I can't decide if theses are errors in Autologic, errors in the car's settings from the factory, or just anomalies that I should ignore.
What I really hoped to find, though, was an explanation for poor throttle/turbo response. The turbo takes a full 2 seconds to achieve boost. Once the turbo comes in, there's plenty of power. It starts, runs, cruises normally, doesn't smoke and is economical. It can boost from well under 1500RPM. It's just laggy at higher RPM. It's actually quicker to build boost at low RPM, and the response is worse - extremely laggy - at higher RPM. Surely that' s the wrong way around!
It's not that noticeable to the boring casual driver. It could even be normal for this engine, maybe it's am emissions measure. In which case I will look into doing a remap. But my gut instinct, and experience of hundreds of other diesels, tells me it's not meant to be quite like this.
The EGR valve "Target/Actual" position values look a little bit worrying! A "sticky" EGR valve could lead to a slow boost build up.paul26982 said:
The Autologic is a good machine with great support
How did you know it was Autologic? I guess you know your screenshots.It does seem really good. Connected straight away, takes power from the OBD port. I'm lucky to have access to it especially with a modern complex car.
Still, there were a few anomalies that concerned me. For example the screenshot showing a logged fault with the automatic gearbox reception - this car is a manual! And a setting under the suspension modes for 'Estate' or 'Saloon' that was set to Saloon even though this car is an estate. I can't decide if theses are errors in Autologic, errors in the car's settings from the factory, or just anomalies that I should ignore.
What I really hoped to find, though, was an explanation for poor throttle/turbo response. The turbo takes a full 2 seconds to achieve boost. Once the turbo comes in, there's plenty of power. It starts, runs, cruises normally, doesn't smoke and is economical. It can boost from well under 1500RPM. It's just laggy at higher RPM. It's actually quicker to build boost at low RPM, and the response is worse - extremely laggy - at higher RPM. Surely that' s the wrong way around!
It's not that noticeable to the boring casual driver. It could even be normal for this engine, maybe it's am emissions measure. In which case I will look into doing a remap. But my gut instinct, and experience of hundreds of other diesels, tells me it's not meant to be quite like this.
I can't decide whether the value for "Opening control applied" should approximately match "Required position setting", or if I am not interpreting it incorrectly. I wondered if they were meant to match. Then I thought: surely the ECU would consider it a fault if the EGR actual position was not matching the desired position?
But there was no EGR fault logged :/.
Do you know what else I can test, to narrow down the fault to the EGR?
I am just playing amateur mechanic, I know - learning just how advanced things have become.
Pentoman said:
How did you know it was Autologic? I guess you know your screenshots.
It does seem really good. Connected straight away, takes power from the OBD port. I'm lucky to have access to it especially with a modern complex car.
Still, there were a few anomalies that concerned me. For example the screenshot showing a logged fault with the automatic gearbox reception - this car is a manual! And a setting under the suspension modes for 'Estate' or 'Saloon' that was set to Saloon even though this car is an estate. I can't decide if theses are errors in Autologic, errors in the car's settings from the factory, or just anomalies that I should ignore.
What I really hoped to find, though, was an explanation for poor throttle/turbo response. The turbo takes a full 2 seconds to achieve boost. Once the turbo comes in, there's plenty of power. It starts, runs, cruises normally, doesn't smoke and is economical. It can boost from well under 1500RPM. It's just laggy at higher RPM. It's actually quicker to build boost at low RPM, and the response is worse - extremely laggy - at higher RPM. Surely that' s the wrong way around!
It's not that noticeable to the boring casual driver. It could even be normal for this engine, maybe it's am emissions measure. In which case I will look into doing a remap. But my gut instinct, and experience of hundreds of other diesels, tells me it's not meant to be quite like this.
used to use one at my old work. expensive for what they are. like the VW one is just abit posher VCDS with great support. now im on my own use a genuine Launch Diagun x-431. Genuine VCDS and a great copy of a autocom toolIt does seem really good. Connected straight away, takes power from the OBD port. I'm lucky to have access to it especially with a modern complex car.
Still, there were a few anomalies that concerned me. For example the screenshot showing a logged fault with the automatic gearbox reception - this car is a manual! And a setting under the suspension modes for 'Estate' or 'Saloon' that was set to Saloon even though this car is an estate. I can't decide if theses are errors in Autologic, errors in the car's settings from the factory, or just anomalies that I should ignore.
What I really hoped to find, though, was an explanation for poor throttle/turbo response. The turbo takes a full 2 seconds to achieve boost. Once the turbo comes in, there's plenty of power. It starts, runs, cruises normally, doesn't smoke and is economical. It can boost from well under 1500RPM. It's just laggy at higher RPM. It's actually quicker to build boost at low RPM, and the response is worse - extremely laggy - at higher RPM. Surely that' s the wrong way around!
It's not that noticeable to the boring casual driver. It could even be normal for this engine, maybe it's am emissions measure. In which case I will look into doing a remap. But my gut instinct, and experience of hundreds of other diesels, tells me it's not meant to be quite like this.
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