There is a huge mess in the fastq format description and sometimes you might get lost trying to find which is the encoding of your file. Because of that i found a script written in here that you can use to find out which is the correct version of your files with the command:

awk ‘NR % 4 == 0’ your.fastq | python %prog [options]

So far this support the following encodings:

‘Sanger’: (33, 73),
‘Solexa’: (59, 104),
‘Illumina-1.3’: (64, 104),
‘Illumina-1.5’: (67, 104)
My file outputed Solexa  Illumina-1.3    (66, 104)
There is also this script:
./ reads1.fastq

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