OK, on the vac. line that runs from the manifold to the opti there is a little blue and white disk. what is this things function? Mine got burned on the header and now I just have a straight line. my car feels weak up top and misses ever now and then. i get a vac./maf code ever now and then.can this effect my timing?

 

I believe it is a check valve so flow only goes one way. Not sure if it could affect the opti but it is there for a reason

 

May also prevent moisture from getting into the opti.

 

Opti vacuum hose

 

hey shoebox. do you anywhere that I can Buy that entire line and the parts?by the way will it have an effect on your car if the flow reducer and the backflow prevention things arent on there??

Thanks,Sean

 

You can damage the opti without the flow reducer. The part number for the complete opti harness will all those things on it is listed on my part numbers page.

 

is this all I would need?

1995-1997 optispark vent & vacuum harness 12555323 $11.58

1995-1997 optispark o-ring (need 2) 10474278 $0.76

 

Dont need the o-rings, they're for the opti shaft

 

can it mess with the timing if there is no flow reducer or backflow things?can it somehow effect the opti

 

If you don't use the flow reducer you could possibly put too much vacuum on the opti internals. Use your imagination after that.

 

so this part number here includes the flowreducer and backflow thing in it?

1995-1997 optispark vent & vacuum harness 12555323 $11.58