P0171 system too lean bank 1

[shnazzle]

I'm clueless about it and I've been reading up and tinkering for over a year

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[K T M Rider]

Did I find you rude?  - no, not even remotely (forums are great for alot of things including generating misunderstandings   s:lol: :lol: s:lol:  )

Perhaps in a rather convoluted fashion I was trying to respond to this comment............

who knew there was a position sensor on the crankshaft that helps change ignition timing based on rotation speed to make sure expansion happens at the right rate and time! (Probably a lot of peeps on this forum except me  s:D s:D  ).

............with a response that indicated I had a less (EDIT - ok very much less ) than firm grasp of this stuff myself despite (but also to some extent because of) working on my own vehicles for the last 31 years

I say to "some extent because" as the (motorcycle) engines I was pulling apart in the late 80s didn't have engine management - they didn't even have fuel injection. Whereas if I was starting out as a DIY mechanic today then I suppose i would be alot more keen to read up on E.M.  

Engine management (as the term is generally understood today anyway) came along with EFI and Catalytic converters. When I started owning the odd car in the 90s I purposely avoided anything with a Cat on the basis that this was one less thing to go expensively wrong   s:) s:)  

Apart from a motorcycle I briefly owned around 2005, the first Cat and EFI equipped petrol engined vehicle I owned was my first MR2 Roadster in 2010..........

The other thing about E.M. is that (in my experience) it tends to just work, so I've had no reason (so far) to learn about it, although I wouldn't mind squeezing a bit more power out of my Roadie at some point.......

This quote makes me feel better   s:) s:)  

Modern engine management systems do a fine job of ensuring that engines run cleanly and efficiently in a wide variety of conditions, they are for the most part reliable and require little or no maintenance. However they seem from the outside to be fearsomely complicated systems which defy all attempts at understanding. Amidst all this apparent hokum it is easy to lose sight of the two basic functions performed by an EMS.

To meter fuel to the engine in the right quantity

To provide a spark at the right time

Taken from:

 m http://www.s262612653.websitehome.co.uk/ems/ m

[K T M Rider]

I recall that when I was on here between 2010 - 2012 there was no -one who seemed to understand E.M. on our cars better than Cap:

 l memberlist.php?mode=viewprofile&u=9566 l

So you might want to check out some of his posts - just a thought.

[delhusband]

Thanks! Relieved no offence caused, sometimes when i reread what I've typed i cringe a bit   s:) s:)  also thanks for this

I recall that when I was on here between 2010 - 2012 there was no -one who seemed to understand E.M. on our cars better than Cap:

 l memberlist.php?mode=viewprofile&u=9566 l

So you might want to check out some of his posts - just a thought.

Ill have a look