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Originally Posted by pegese3
My Vento (Jetta) 95 1,8 does not work in cold weather. It starts and engine runs for 2 seconds, then dies. Installed a new coil but that did not solve anything. The computer at the shop did not record any malfunction in "normal" temperatures, but below 0 degrees Celsius (freezing point) it showed "ECU blocked". They reprogrammed the ECU, but the engine will still not start. Is it most likely that I have to replace the ECU or is there any malfunctioning connected components or bad connections that can cause these problems ?
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Earlier you said the engine would start and run for 2 seconds and then die. When it did this, was the engine speed very high? If so, clean the MAF sensor. Now, it appears that the engine will not start at all. Is this true or does it have the same sympton as before?