Hawg55

I bought a MSD vented optispark cap for my 93, and am having a problem trying to figure out where the line with the check valve goes. Their directions are a little vague, as it says Route the vacuum line around the
side of the engine and up to the
intake manifold. Splice into the
hose that connects just over the
PCV valve (Figure 8). Also note the check valve that is
in-line. The black side of the valve must face towards the vacuum source. On the 93 the PCV valve is on the right side of the engine, and where they show the hose going there already is a vacuum hose there with a tee. Where are you guys hooking this hose to????

eatmydst1234

I tapped in to the vacuum line that goes off the passenger side of intake back to the hvac I will try and get a photo of mine after work if nobody else supplies before then.

Hawg55

Thanks that would be appreciated!!!

jaa1992

Different opti - but I just tapped a vaccum line on the driver side head.
IIRC it went from the intake to the EGR selenoid.

eatmydst1234

Here is how I have mine set up, works good too.