TT running extremely rough

[tkay564]

Hi and greetings from Finland!

Currently i cannot get my '90 TT to run correctly. It seems to run extremely rich until the spark plugs die.

It has been said that the car may have 850cc (or maybe 740cc) injectors.

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I downloaded the rom map from the ECU and compared it to Nistune's original 47P10 map. Here are the only two differences with the maps. Otherwise they're identical. Are the settings anywhere near of what they should be? Thanks in advance!

- Tapio

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[Matt]

You might need to do some reading up on those parameters in the software manual.

Basically the K constant is too high for those injectors which is why it is running rich. Also the scales will need changing and fuel map tuned after fitting larger injectors