If your photo is correct you have a 90-91 TT. Concept Z (for example) wants $165 for the same injector you say you paid $160. So the price was not a "rip off" even if you could have gotten it cheaper. Also the guy sold you just the injectors you need, rather than try to sell you an much more complex (at that time) and expensive conversion to new style. (Note there appears to be quality new style kits with used injectors for a reasonable price, but I don't believe this Deatschwerks based kit was available until recently and it used to required machining the lower plenum which is a PITA and apparently frequently botched) Why don't you just change bad injector and take the voltage off all of them as recommended? I think if you put the new style in but don't modify the wiring the same way you would for the old style, you very well might have the same problem. (albeit with a better connector).
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