Any experiences please, advise, warnings etc concerning remaps for the 1.6tdi CAYC engine which is in various outputs up to 105hp (?) in several VAG models, that can be placed all on one thread. 

 

The engine isn't VAG's best effort, there are known injector issues and the car is affected by the 'fix' and the 'hunting idle' problem etc - have these issues been cured, or made worse by remaps? 

 

Is an OBD generic remap possible, or is 'open heart' surgery required on the ECU?

 

2 minutes ago, b1ackb1rd said:

there are known injector issues

Not to mention EGR problems.

The car of my daughter is a Touran 1.6Tdi CAYB (90PS). After the famous factory (dieselgate) remap, the car was unmanageable and showed a X-mas tree on the dash. A remap on dynamometer resulted in 158PS (156BHP). Now it is a marvelous to drive

I'm after having my car mapped with its dpf delete, 140hp map. Not had a chance to give it a good run but definately a lot less effort to accelerate up to speed.

DPF delete CAYC won't pass MOT in the UK, at least not in an reputable workshop.

My car is NCT'd until December next year, my standard downpipe was rotten so I got a darkside one. I have a year and a half test on it before it becomes a problem.

@Erreesse

As well as the roll back of the Emissions Fix and then the remap was the Flow Device that had been fitted during the Fix removed?

Sorry for the delayed answer (my English is not that good, so I had to read the quote several times).

 

We received 3 times an official letter and went to the dealer. Before the "emissions fix", they´ve made the annual service and then a flow device was installed. They loaded the new SW (6938) and it went wrong. "Sorry it is not our fault, but the car was mistreated before" ???? After a few weeks with an undriveable car we went to a respectable chiptuner who loaded the same "new Emissions Fix" SW (6938) in to the ECU and removed the "Flow Device". On the rolls for power measurement (92PS), half an hour later back on the rolls and 20 minutes "laptop play", with a nice result: 158PS !

Edited 17 June, 20214 yr by Erreesse

158ps is surely squeezing the most out of the stock turbo/injectors right?

Remap on mine has made it a much nicer car to drive, lot less effort to get up to speed and passing people is a lot less difficult. Been averaging 56~ mpg since too which I can't complain about.

As I wrote, it is all stock. The remapper told me the CAY-engines (75/90/105/...) are basically the same. The problem is under 120ps the exhaust temperature is not high enough, so with short journeys the DPF can not regenerate and clog.

The remap is done almost 2 years ago, and never an engine problem, no X-mas trees, no stalls. For my daughter (with her 4 kids) its a dream to drive the car (VW Touran 7pl), and..... less fuel consumption, even with wider tires (235/45R17).