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Old 07-09-2004, 03:20 AM
Tom Dent Tom Dent is offline
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Question HELP!!! .. F 250 302 failed Air care

My truck failed Air Care on the drive test. The Hydrocarbons and CO was too high. I've had it troubleshooted and took care of all the codes. I had a small leak in the Thermactor Air By Pass Valve vacuum diaphragm and changed the whole valve. My hydrocarbons and CO is still high. The Thermactor system still seems to have a problem. The Haynes manual that I have says that when the engine is warmed up, to shut the engine off and hook up a vacuum guage to the Air Bypass Valve, start the engine and the vacuum should hold for between 100 and 180 seconds, mine only holds for 34 seconds and then releases. The EEC is showing no codes and all the sensors seem to be working OK. PLEASE can anyone help??? I'm at my bloody wits end trying to figure it out, and so is the garage.
Thanks to anyone that replys.
Tom ... Old Bottomburp@aol.com
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Old 07-11-2004, 12:32 AM
ryanguglich ryanguglich is offline
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where in alberta\bc did you have to go for emmissions testing?
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Old 07-13-2004, 06:17 AM
Tom Dent Tom Dent is offline
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I'm in Maple Ridge BC, in the lower mainland about 25 miles east of Vancouver
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Old 07-13-2004, 08:45 PM
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Dealford Dealford is offline
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Have you tried cheating yet???
Make another appointment for the test. Run the fuel down to 1/8 of a tank. Just before you get to the test facility, add 1 gallon of methyl hydrate(sp)(gas line antifreeze) to your tank.
That's a common trick in Ontario for us poor folks to get a pass on the emmissions test here. Not knowing your test system, I have to ask...what do you have to loose?
After the test, you'll want to fill the tank right up to reduce the % of M.H. in the fuel.
AL.
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Old 07-13-2004, 09:12 PM
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As far as I know, it's the same IM 240 test in BC and Ontario.
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Old 07-22-2004, 01:48 PM
P-T P-T is offline
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On at least 3 occasions with different vehicles I've
- failed air care
- run the tank down to 1/8, gone to Mohawk for green gas
- replaced air filter
- gone to a different testing station
- passed
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Old 07-22-2004, 01:48 PM
 
 
 
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