Originally Posted by Opelkurt
One possibility is a faulty thermo-time switch, which controls the function of the cold start injector.
-Kurt
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. . . have to agree with K
urt 
, though the TTS device (brown electrical plug) may not itself be defective. I would remove the electrical plug and look inside it to see if the rubber seal is still inside it.
The TTS connector seal's function is really two-fold, to 'seal', obviously, but also to hold connector firmly in place to ensure contact alignment, i.e. good contact. When the seal is missing, engine vibration can cause non-contact and the cold-start injector never opens . . . ask me how I know!
