[Diy_efi] Need help from the experts diagnosing lean state

Sun Feb 20 08:10:39 GMT 2005

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Well, the movement of any ferrous material within the inductor's field is  
going to affect its behaviour, because its inductance will change.  My  point 
is, you are going to have to do some work with known good injectors to  
ascertain what it should look like, and compare your injectors on that  basis.  

I genuinely don't know what difference a stuck or lazy pintle will make, it  
can't be more than the order of a few percent or so, so the scope is  going to 
have to be a good one, high resolution and accuracy, and preferably a  DSO 
because you will be trying to capture transient events which don't  necessarily 
repeat every inject cycle.  

I would be very interested to know whether anything shows up.  I'm a  
relative newcomer to EFI stuff although a competent engineer, and this sounds  like a 
really interesting practical diagnostic issue.

Regards

Will Cowell
G0OPL

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<DIV>Well, the movement of any ferrous material within the inductor's field=20=
is=20
going to affect its behaviour, because its inductance will change.&nbsp; My=20
point is, you are going to have to do some work with known good injectors to=
=20
ascertain what it should look like, and compare your injectors on that=20
basis.&nbsp; </DIV>
<DIV>&nbsp;</DIV>
<DIV>I genuinely don't know what difference a stuck or lazy pintle will make=
, it=20
can't be&nbsp;more than&nbsp;the order of a few percent or so, so the scope=20=
is=20
going to have to be a good one, high resolution and accuracy, and preferably=
 a=20
DSO because you will be trying to capture transient events which don't=20
necessarily repeat every inject cycle.&nbsp; </DIV>
<DIV>&nbsp;</DIV>
<DIV>I would be very interested to know whether anything shows up.&nbsp; I'm=
 a=20
relative newcomer to EFI stuff although a competent engineer, and this sound=
s=20
like a&nbsp;really interesting practical diagnostic issue.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Regards</DIV>
<DIV>&nbsp;</DIV>
<DIV>Will Cowell</DIV>
<DIV>G0OPL</DIV></FONT></BODY></HTML>

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