Failed Emissions due to Opacity?
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Senior User
Joined: Apr 2003
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From: Cleveland Area
Failed Emissions due to Opacity?
My 95 F-20 HD PSD just failed emissions due to a high Opacity. A count of 80% versus allowable 20%. I have not driven the truck as much as I would like, but I just finished driving over 50 miles with it. Highway too. Will driving the heck out of it, getting on the turbo, blow out the soot I believe is causing the high opacity reading, or are we talking actual maintennance? Any Ideas appreciated.
Thanks - Grinch
Thanks - Grinch
Postmaster
Joined: Jan 2004
Posts: 4,758
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From: colorado
if you have any mods like a chip, 18k, 10k, clamp, ect. take them off. when i was getting my test a few weeks ago the guy before me said his truck had failed and he put some fuel additive in to reduce smoke, he drove it for a few days and brought it back in and it passed, i did not catch what he said he put in. a high opacity means its smoking too much
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Senior User
Joined: Apr 2003
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From: Cleveland Area
I probably let it idle too long before the test, and had not drove it hard enough to blow out any junk in the exhaust. Filter was new and the oil was 800 miles old. So I drove it at the speed limit + for 80 miles 2 days in a row, on and off the turbo to clear out the motor, and behold, it blew a 0.0% on opacity (limit is 20%) when 2 days prior it was a 79%. There is a good reason to drive the truck often and drive it fast and hard.
Junior User
Joined: Aug 2004
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From: Ohio
Grinch! I am in Cleveland too, and recently was tested. My truck is a 95 and smokes like crazy, and it registered 0 opacity. Opacity is how much light the exhaust can block. I went to the test center off of Puritas. GO THERE, THEIR EQUIPMENT HAS KINKS IN THE HOSE BECAUSE THEY CUT IT TOO SHORT-IT'S A GUARANTEED PASS!!!!
Good luck, Tony D.
Good luck, Tony D.
Senior User
Joined: Jan 2003
Posts: 305
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From: Penn Valley
The opacity machine my mechanic uses goes inside the pipe itself so there is no hose so no hope of that. If it reads a 0.0% opacity it will not register a good test, it will assume the machine is not working.
Birken
Birken
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