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Bobnotch Tue Aug 12, 2025 12:26 pm

FastyOrange wrote: If you want to run the late model crankcase breather setup, you need the correct IAD and the correct heads (i.e. late heads with the breather ports). The easiest cylinder head port to find is on the passenger side. Pull your air cleaner off and look down at the cooling tin next to the spark plugs at the back of the motor on that side. You should see a cutout with either a hose running down through the tin or no hose but a breather port on the end of the head if you have the right heads. The other breather port is in the same position on the driver's side head, so it will be up near firewall. Passenger side shown below.



If you don't have the late heads, it may be easier to just swap the breather for the early style. It is my understanding that this will also work. Hopefully bobnotch or someone else can confirm that.

You also need to look at the fuel injection parts chart from the k manual shown below and compare the numbers on the chart to the parts on your car before you buy a bunch of parts.



Start there and see if you are even running the correct parts for your model year. You may have a different generation of FI installed...that is fine if the parts match.

Once you know these details you can start figuring out what you need and hopefully avoid buying a bunch of unnecessary parts...and we can better understand what you're working with and how to help when you have issues.

Jon

Yup, those were the ports I was talking about. Personally I'd just swap the breather box to the single cap version, and be done with it. Then you wouldn't need to change out the plenum or any of the other stuff. I do agree with keeping the FI parts within the same parts group (example A B C D or E) as the system does need to match. Granted there are a couple of places / spots where some bits do cross over. Some things like "C" or "D" MPS units do cross over, as do some distributors and throttle switches. Keep in mind the temp sensors do cross over thru the years, although there shapes changed (some are longer, but carry the same part number). You really need to find a list of the parts of the FI system that use the same parts numbers, like posted above. I hope this helps.

Scotty D Fri Aug 15, 2025 9:14 am

Awesome information, thanks guys!

I'll dig into it when I can and see what the part numbers are for the various F.I. equipment.

Cheers.



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