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DIY Flashing of ECU via OBDII port

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Was looking on E-Bay at possible cheap way of tuning 1995 A4 TDI 90bhp. Came accross people selling fuelling maps and software to flash ECU via OBDII port. Also found USB - OBDII cable for £20 from Hong Kong (which is claimed to work with the Rosstech VAG-COM software) for connecting PC to OBDII port. Has anyone out ever done this and if so what were the results? Have looked at all the conventional tuning services but can't justify cost on basis of value of car / fact that I'm a tight Scotsman. Any feedback would be most welcome.

Cheers

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All I would say is you get what you pay for. You can pay anything up to £500 or £600 for a professional remap from REVO or AmD, or as little as £250 or so from a travelling tuner (there are a couple on here).

You pays your money and you takes your pick...

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Travelling Tuners? Do they use the Pikey Port? grin.gif

(I would never even consider it btw - I'm a massive fan of proper remaps but there's huge potential for things to go wrong if you get a cowboy installation. ECUs are sensitive and expensive for one. £500 is peanuts for the benefit and at least if you go to a reputable tuner - there are many discussed at great length on TSN - you know that hundreds of others have gone before you)

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Thanks guys. Suspected it was too good to be true. Would still be interested to hear if anyone has tried it though : even if it is a horror story to confirm what I suspect to be the truth. Thinking of upgrading car to A4 2.5TDI next year probably around 1999 vintage. Is the non red"I" one 150 bhp and what could I expect with a decent remap?

Thanks again for your time

Cheers

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I agree with Mook and Mollox - It's too risky to do anything other than use a known professional expert and one you can go back to afterwards. To do otherwise runs the risk of costing you far more than the saving gained by "cheap ways".

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Using a cable will not flash your ECU - far from it. What I meant by "do it on the cheap" was get a cheaper tuner to do it for a couple of hundred quid than paying £600-£700.

The equipment to flash your car is available on ebay for around £200 all in, but the knowledge you'll need to use it can't be bought I'm afraid!

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[ QUOTE ]

Using a cable will not flash your ECU - far from it. What I meant by "do it on the cheap" was get a cheaper tuner to do it for a couple of hundred quid than paying £600-£700.

The equipment to flash your car is av

ailable on ebay for around £200 all in, but the knowledge you'll need to use it can't be bought I'm afraid!

[/ QUOTE ]

Yes it can be bought £500 - £600, so you may just as well go there in the first place ! smile.gif

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[ QUOTE ]

Was looking on E-Bay at possible cheap way of tuning 1995 A4 TDI 90bhp. Came accross people selling fuelling maps and software to flash ECU via OBDII port. Also found USB - OBDII cable for £20 from Hong Kong (which is claimed to work with the Rosstech VAG-COM software) for connecting PC to OBDII port. Has anyone out ever done this and if so what were the results? Have looked at all the conventional tuning services but can't justify cost on basis of value of car / fact that I'm a tight Scotsman. Any feedback would be most welcome.

Cheers

[/ QUOTE ]

There 1 big setback to this, Your car isn't OBD-II, So you cant flash your ECU.

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I think you will find "flashing" vai OBD port will leave a signature and it can be seen, however the car may be out of warrantee anyway, BUT insurance may be an issue should you not mension when...................... bla,,,bla,,,,, smirk.gif

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[ QUOTE ]

Thinking of upgrading car to A4 2.5TDI next year probably around 1999 vintage. Is the non red"I" one 150 bhp and what could I expect with a decent remap?

[/ QUOTE ]

IIRC, it's 155 bhp for the 2.5 TDI. You should expect about 180 bhp after a remap, but with a diesel, it's the amount of torque increase you should be looking at - this will determine how well it pulls between the gears.

Try to get hold of a 163 bhp version if you can - they are a lot more tuneable - up to 210+ bhp and 300+ lb/ft of torque

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