1990 2.9 intake volume/cat backpressure
Two part question about a 1990 Ranger 2.9
This old beater has been running great until recently.
Air volume: The factory airbox deteriorated and had to be removed. I replaced it with a K&N cone filter, its been running rich and now its taken out cat number 2. My thought was to paint part of this K&N cone with bedliner stuff (or something, open to suggestions) to block volume. Im sure I can find the volume of the cone, wondering if theres any way to know the volume of air the stock configuration lets in. From there I could guesstimate what percentage of this filter to block off.
The Cat: The cat is shot again, making all kinds of racket, feels plugged at times. I dont get tested here and dont ever want to buy another one... Whats the best way to clean this one out and should I worry about losing back pressure after its cleared?
I appreciate any insight.
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