I have 3 vacuum hoses that connect to the bottom of the throttle assembly. On the 2.3 4 cyl., I can reach my hand under the front of the intake and put my fingers on those 3 connections. I assumed that 1 of those was the one coming from the Ignition Control Module, but when I tugged on the plastic line I could trace it coming back up to the top of the intake.

When I removed the Fuel Distributor/Throttle Assembly, I had good access to all of the hard to get to vacuum connections.

Good luck,

Dave

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1993 190E 2.3
2001 SLK230
1971 LS5 (454) Corvette Convertible