Ok thought I'd post this to see what comments I'd get back?

So is it a good idea if your keen to understand how things work or just plain stupid?

Stupid.

^ What he said

Lol.

So is this because it's a complicated electrical component or through lack of knowledge of how diesel engines work?

One member had a FUBARd map from a firm and needed a new ECU in the end. Bout 700 to fix it.

Unless you have the faintest idea, leave well alone. You could end up with a dead car and an expensive repair bill. Leave to firms that know what they are doing and back it up with a guarantee.

Lol.

So is this because it's a complicated electrical component or through lack of knowledge of how diesel engines work?

You really need to understand how both works first.for 99.9% of people it will be a very bad idea and probably cost you a fortune to repair.

BUT don't forget ALL of the best re-mappers started somewhere, but it will take a lot of studying, knowledge of ECU's and electronics and how the engine works (and ideally a tutor who has been there before)

You need to be an expert in diesel engine management, electronics, software, mapping characteristics and dyno setup.

Remember 100's of hours go into building software correctly........

Their are plenty of non experts or so called experts out there.

In the old days people were happy to play with carbs and distribution caps. Whats the difference in the digital world apart from hardware?

the difference is very big bills on cars that are much more complex and expensive to fix than "The Old Days" best left to those who know what they're doing

Because back then things were much simpler and if something wasn't right the screw could just be turned back to how it was before. Whereas with a computer controlled engine if you do something wrong you could end up bricking the ECU with no chance of recovering it.

As much as I would also love to be able to do my own remap and as competant as I am with cars and computers that is one area I would never dable in!

Phil

Lol about undoing the screw.

Right well reason I posted this up is because I had an interest so began reading...a lot of reading

So far I've read my original map. Found a few maps like drivers wish, smoke map, torque limiter, durations maps/selectors, soi maps/selectors, boost map, boot limiter, plus many others. Then bought a spare ecu for 99p (it has got faults) as you'll be daft to work on your original.

To be able to make the ecu plug n play without using VCDS (plus i dont have the skc) I managed to clone the immo3 chip from my original on to the spare.

That's about it do far as I have a fuel relay fault on the ecu which causes random cut outs. So next step is to get another spare. The 99p will be used for brinking

To avoid voltage drops I've made a bench psu (old pc). I can now read the ecu's when not fitted to the car.

It's been an interesting few months reading with still plenty to go.

Well got another spare ecu yesterday. Came of a passat pd130 but is still a Bosch edc15p+. Interesting to see this software version has 3 sets of parallel maps unlike the ASZ's 2.

Like before I've taken a copy of the engine and immo eeproms for backup/research and flashed my originals creating a clone. VCDS is happy reading the ecu on the bench and is showing all the right info.

Hopefully I should be able to fit it this weekend.

Over the last few weeks I've been trying to understand how the ECU manages rising IAT. I'm assuming their is a map(s) that measure RPM against IAT but I'm struggling to find any :( Well saying that I have got one but it's for the smoke against MAP limiter which by default the car doesn't use.