Does anyone have any experience of changing ECUs? My old one on my Z31 seems to have suffered from a rain leak and will deliver neither fuel nor spark to the engine. ( It only cranks over). I have seen a number of alternative replacements from other Z31s of the same, or adjacent year, (mainly from the USA) - but none with exactly the same part number. The nearest has 9 of the 10 digits the same. Only the final digit is different. Does anyone have thoughts or opinions on whether this or ones similar are likely to work? (at least to start the engine and make the car mobile). Thoughts,opinios, experience - welcome