PVC or breather?

Hello jcolman,
Just some info to consider when installing a Holley Sniper.

Read and understand the complete installation instructions before starting work.
Follow the wiring recommendations, Shortcuts here will result in problems....
The instructions can be found here
https://documents.holley.com/199r11031r.pdf

You can find install video's on Holley's site and on YouTube (time well spent).

You should use a Fixed Orifice type PCV valve with the EFI. Common types of PCV valves use a plunger or a flat disc with a spring to control airflow through the PCV valve depending on amount of vacuum overcoming the spring. both types have a tendency to bounce around when the engine is running under various conditions.
This bouncing causes chaos on the IAC control in the Sniper resulting in idle, drivability, and tuning issues. To overcome this we install a Fixed Orifice type PCV valve. This will always provide a constant flow of air through the orifice that does not effect the IAC. Note: the fixed unit only comes in a straight configuration so you need to buy the 1183DL and take the black 90 Deg fitting off it and install it onto the Fixed one See

When considering the fuel system components thoroughly research the the pros and cons of both external and in tank pumps and return and return less systems.

For the novice installer its better to just install the sniper system itself first and get some ride time on it before adding other upgrades like a Hyper Spark or duel sync dizzy to lessen install / integration issues that can arise.

I have installed several Snipers on customers cars and they work well when installed / tuned correctly. If you have any questions feel free to ask.

Stay Safe....
Happy Mopar :)
Arron

View attachment 1715749656 View attachment 1715749657 View attachment 1715749658
Thanks Arron! Much appreciated!! My shop is installing the system but I will be sure to let them know about the pvc valve. They are also installing a hyperspark at the same time. They've done a lot of these installs so I'm hoping all goes well.