exhaust back pressure test
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exhaust back pressure test
My `92 460 has the Banks power pack with 172000 miles and My question is:
When/how do you know when it`s time to replace the catalytic converter. truck still passes smog, so it is working, but how do you test for proper flow?
Unnecessary back pressure is not beneficial in any way
Anybody here know of any tricks or test I can do in my driveway?Thanks.
When/how do you know when it`s time to replace the catalytic converter. truck still passes smog, so it is working, but how do you test for proper flow?
Unnecessary back pressure is not beneficial in any way
Anybody here know of any tricks or test I can do in my driveway?Thanks.
FTE Legend
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From: Ottawa, Ontario
Backpressure = restriction and since an engine is a big air pump any exhaust restriction will result in loss of power and economy.
With a truck of this age if the cat is original it's overdue for replacement.
With a truck of this age if the cat is original it's overdue for replacement.
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California is so special
The cat itself is over$500.- plus labor(gotta love California) so replacing it based on age alone is not enough evidence of abnormal restriction or back pressure. I would expect higher coolant temps, maybe some audible noises, and obvious performance loss, bur since I just bought the truck I don`t have a baseline or reference point.There ought to be some way to test this.
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I have never heard of a back pressure gauge before, but if they make one ,then I can find one. Do you have any values, or better said , where is the cutoff line between good flow and restricted flow. My idea would be to measure cfm going in versus cfm coming out, or some thing along air flow.
Tuned
Joined: Jan 2013
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From: Vancouver Island BC
I have never heard of a back pressure gauge before, but if they make one ,then I can find one. Do you have any values, or better said , where is the cutoff line between good flow and restricted flow. My idea would be to measure cfm going in versus cfm coming out, or some thing along air flow.
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Drill me some holes Scotty
Thanks, that`s a great Video. I found another method in the Factory manual that measures vacuum at the throttle body. But this looks a lot simpler. The question is where to get that gauge he uses?
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Tuned
Joined: Jan 2013
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From: Vancouver Island BC
I plan on gutting my cat pretty soon, so back pressure will no longer be an issue
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