Head-aches and ill after a tune.
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From: England UK
Head-aches and ill after a tune. Okay this may seem odd, but I'm running OL-MAF tune, and on idle I'm running lean about 16:1 AFR. When sitting in traffic and general round town driving for 1 hour I get a really bad headache and that night was pretty ill 
. Thought it was coincodience, then done a 20min drive today and headache is coming back. Thought it was just the noise but drove steady, so now thinking its the fumes.
I have a few leaks after the cats which arn't fitted. Its just a clamp that needs tightening.
Has anyone else had this problem.
I spends a bit of time in idle, so wanted to save a little fuel by running leaner. I guess i could go righ again to see if that help me head.
. Thought it was coincodience, then done a 20min drive today and headache is coming back. Thought it was just the noise but drove steady, so now thinking its the fumes.I have a few leaks after the cats which arn't fitted. Its just a clamp that needs tightening.
Has anyone else had this problem.
I spends a bit of time in idle, so wanted to save a little fuel by running leaner. I guess i could go righ again to see if that help me head.
What are your cam specs? If you're running a bunch of overlap, you're gonna get alot of raw HCs out of the tail pipe. Along with elevated levels of CO (carbon monoxide). I'd look into getting it to a tuner. CO poisoning is real, real bad.You can get the emissions lower using a gas analyzer, but depending on the overlap (duration/LSA) you may never clean it up all the way. At the expense of a few HP I try not to use anything with less than a 112 LSA. I know everybody else runs 110 and stuff, but they come at a price
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From: England UK
Originally Posted by ringram
H5N1 dude! You been on any dodgy turkey farms recently?
Or carbon monoxide poisoning from inhaling too many fumes! Leaner should make less CO, but maybe more NOx
Or carbon monoxide poisoning from inhaling too many fumes! Leaner should make less CO, but maybe more NOx
I think the NOx is the problem.
Originally Posted by edcmat-l1
What are your cam specs? If you're running a bunch of overlap
Originally Posted by jeffstar
Really lean running cars give me headaches quicker then really rich running cars. From my experience.
I tihnk I will sort out the exhaust least then see how I feel then, is still dodgy then will get it back to 14.6:1 on idle, and lean when driving at low MAP (no load)
Alright, first, by definition, lean is low CO. So, to get CO poisoning from a lean condition, and not a rich condition, just doesnt make sense. and if you're running lean enough to be making enough NOx at idle, you're in big trouble anyways. NOx is created when cyl temps exceed 2500 degrees. At that point the engine is on the verge of spark knock.
When you move away from stoich, CO increases as you richen up, and decreases as you lean out.
When you move away from stoich, CO increases as you richen up, and decreases as you lean out.
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From: England UK
Originally Posted by edcmat-l1
Alright, first, by definition, lean is low CO. So, to get CO poisoning from a lean condition, and not a rich condition, just doesnt make sense. and if you're running lean enough to be making enough NOx at idle, you're in big trouble anyways. NOx is created when cyl temps exceed 2500 degrees. At that point the engine is on the verge of spark knock.
When you move away from stoich, CO increases as you richen up, and decreases as you lean out.
When you move away from stoich, CO increases as you richen up, and decreases as you lean out.
So NOx is definatrly created when lean, but cant quantify how much unless I put it on a sniffer. Only got WB rigged up to the car.
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From: England UK
Originally Posted by ringram
wernt you in closed loop? Thats should have dealt with lambda
So this is almost a year on and I chose to run open loop idle. I may just put it back to closed loop idle or make it run nearer 14.6 see if my head feels better.
I done a seach and some hybrid engines are trying to run 20:1 AFR.
Anyway I think this weekend if the weather is nice I'm going under the car to check all the clamps that hold the exhaust together, I( got some sealer stuff so I'll pt some of that in before I clamp it tight. No chance of holes then.
I'm in the same boat. Since Noriss Motorsports installed my cam and tuned my engine the exhaust fumes smell inside my car has become unbearable. It's definitely worst at idle, and this even happens with my AC off or on. It's bad enough that my clothe smell like exhaust.
Good thing my TA is no longer my daily driver, because I would be going nuts. I'm thinking of either going back to Norris Motorsports to see if they can re-tune my engine, and/or install cat-converters because as of now all I have is straight Y-pipe.
Good thing my TA is no longer my daily driver, because I would be going nuts. I'm thinking of either going back to Norris Motorsports to see if they can re-tune my engine, and/or install cat-converters because as of now all I have is straight Y-pipe.
there is a little bit of a stinch that comes with running no cats even with stock cam cars. Some people aren't sensitive to it but it drives me crazy. I guess because I smell like it every day I get off work and i really don't want to smell like it when I drive my cars.
"True that. I think I'll just end up putting some high flow cats."
Me too, after 5 years of running no cats, clothes smelling and the wife doesn't ride in the car due to smell, it might be time for cats again. We have very similiar cams ( 227/231 )
Me too, after 5 years of running no cats, clothes smelling and the wife doesn't ride in the car due to smell, it might be time for cats again. We have very similiar cams ( 227/231 )