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Cold start injector signal

190E (W201) 1982-1993: 190E 2.3, 190E 2.6, 190E 2.3-16, 190E 2.5-16, 190 D 2.2, 190 D 2.5, 190 D 2.5 TURBO, 190E 2.5-16 Evolution I, 190E 2.5-16 Evolution II

Cold start injector signal

Old 03-22-2018, 03:10 PM
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Join Date: Sep 2016
Location: Stockton CA
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92 W124 500E, 93 W201 190E, 11 C207 E350, 05 W211 E55
Cold start injector signal

Gents - i have a 93 190E 2.3L (M102) Can anyone tell me where the signal to fire the cold start injector comes from?
I know there is a temp sensor that channels through ECU and then to injector. Which sensor? There is a 4 pin water temp
sensor at front of engine, 2 pin temp sensor for aux. fan, and two other sensors very close in the same proximity. I understand
there is no thermal time switch on this version of the M102 motor? Am i safe to assume the main signal to fire cold start injector/valve
comes from the 4 pin water temp sensor (large black connector)? I would like to try replacing this before springing for the expensive
injector. Extremely hard starts and long crank times when cold, runs and starts fine when warm. ? Thanks Gents.
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