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Re: MAF sensor question Posted by SWEDECAR [Email]  (#112)  [Profile/Gallery]
(more from SWEDECAR) on Sun, 24 Feb 2013 11:00:18
In Reply to: MAF sensor question, Janik, Sat, 23 Feb 2013 20:04:59 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Time have shown that very few (if any) air mass meters set codes even though they are so bad that severe pinging is allowed from lean fuel mixture that can be bad enough to crack pistons.
But I assume you mean two brand new ones out of the box if they can be different enough to cause deviations in readings?
Don't know since I have never had a reason to plug in two new air mass meters in the same car where everything else was tuned to perfection.
The only reason some shops try two new parts after each other is because they misdiagnosed the real problem thinking they knew what the problem was, throwing the part at it discovering it is still the same problem thinking it must be a defective part, throwing another part at it discovering the problem is still there and first then slow down, start to think and look for the real problem.
Using the Tech 2 looking at air mass meter correction value is a pretty good tool seeing if the MAF is good. But it takes into account that all the other parts in the fuel injection system are ok since that very same value can fluctuate wildly from a slew of different reasons.
What MI-Roger points out is also a very real nagging question in today's world of cheap parts coming from less than scrupulous countries.
What happens to a batch of, let's say, 10,000 parts that doesn't pass the OEM specs set forth by the manufacturer? Is it melted down and destroyed?
Or does the maker of the part feel that's just a terrible waste of resources and sell it on the grey market instead in white boxes that later on finds there way into other boxes labeled with whatever after market name?
Many years ago when I worked at Norma ammunition factory in Sweden, every Friday we could go down to the reject room and pick out ammo that didn't pass muster and using it for our own training shooting. It was very welcome with free ammo since many of us did a lot of shooting.
I remember one time a whole pallet was pulled back from the retailer with already boxed up and ready to sell 6.5x55 target ammo.
The real pros who had bought of this ammo claimed it was not as accurate as promised. These are the guys and girls that know how good they are and when the bullet did not hit within their personal allowed spread, they knew something was up with that batch.
I was like a pig in hog heaven since that was the ammo I used and it certainly was good enough for my level of competence.
Anders
, Sun, 24 Feb 2013 11:00:18 <-- Viewing This Message, Sun, 24 Feb 2013 05:58:09
, Tue, 26 Feb 2013 20:51:48
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