Maybe with your birch the gas is more potent, and you could do with opening your air valve slightly?
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There was soot on the valve, (I have never cleaned the intake), so the valve was almost stuck, so maybe it caused the engine to get too little air, it started to run more smoothly at idle now.
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I donât think my 2011 4.3 has this valve. I have a plastic intake so it is likely more convoluted in air flow for increased torque.
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Yes, ha, now itâs the same again, too high co values, does anyone have an idea what I should do?
The top paper is from the first time I inspected since then I have changed.
catalyst
pcv valve
temp sensor intake
map sensor
removed air filter.
When she inspected, the engine became ticking rattling at the 2500rpm test, when I then went home the engine light is on for something wrong with the erg valve, could it have something to do with the co level?
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Hi Jan, egr valves may affect the co-level, leaking, affecting the idle, not opening.
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I removed the erg valve, and it was stuck in the open position, due to a piece of soot, do you think this was the fault?
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Hard to say, open egr valves can affect a lot of stuff, many newâer cars doesnât run at all, mostly the idle and low revs are disturbed.
Do you know some smaller workshop that maybe have saved a co meter?
I have one, but itâs a little bit to far away.
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I have tried to find a co meter but have not found one.
If I go to a workshop, it costs the same as an inspection.
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Jan, I forget, but did you ever install your pwm? At inspection I turn the pump voltage down until they are satisfied with their numbers.
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No, I might have to install pwm.
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Are you usually up for sales in RĂ€ttvik?
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My friend has a 1989/1990 Jeep Cherokee Laredo that refused to run smoothly because the EGR was opening at idle. I blocked off the vacuum port to keep it closed and all is well.
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That was my thinking, find a small village shop, cars,tractors,bicycle repair, where they could help you just check the co level for some kanelbullar/fikalÀngd 
or even let you borrow a co-meter, itâs not something you use everyday at shopâs, bigger workshops probably dont know what it is, only obd scannings for$$$.
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I just checked, and i have 3 co-meters, this one is a spare, if i was sure it runs and measures correct, i could maybe send it to you Jan?
Free, ofcourse, i got it for free myself 
Maybe something Dalarna woodgassers could split?
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made in W Germany. Please consider opening a museum. If Prof Balthazar doesnt have it, no one does.
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I would be very grateful if I could buy this from you, I have the same problem every year with the carbon content and never know if Iâm doing something right, this year I changed almost all the sensors but to no avail, so possibly itâs the erg valve that messed up every yearâŠ
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I would go ahead and replace that valve if itâs found to be malfunctioning. Itâs part of the Emissions system.
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You mean the market? No, I havenât been in several years. Maybe Iâll get the time to when I retire 
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I donât really know, but enough to pass the tests.
Also, the fuelpumps react differently to low voltage.The Volvo pump seems to deliver fuel pressure in proportion to the voltage, while the Mazda pump needs close to 12V to even start spinning.
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