MS Vacuum tube routing

[e3088ix]

Almost done with an MS DIYPNP install in my 88 if, but I'm curious where everyone is routing the vacuum line for the map sensor? All the tutorials/posts I've looked at just say, "route a 3mm line to the ecu from the FPR vacuum line" with no pictures of where the tube can fit through the firewall.

Any help would be appreciated

[Reichart12]

Ive heard you can punch a new hole in the firewall plug where it has 2-3 raised bumps. My plug was already cut so I ran the vacuum line with the wires and wrapped the plug around it. Its not a tight fit to the firewall right now but I tell myself Im not done tidying up yet.

[nando]

This is how I routed mine




I didn't run the tube through the grommet because I didn't want it to get pinched.

There's a factory part with 2 vacuum nipples on it that I used to connect to the intake manifold. looks completely stock. I got it from an '89 325i, they came capped off.

[EatsHondas]

Yes, same spot for me as well. I have my line right through the grommet with no shielding and my MAP signal is clean. No problems. I drilled and tapped the little 3-bolt cap on the intake manifold for a right angle fitting.