Netres availability

WEG1192 at aol.com WEG1192 at aol.com
Tue Aug 21 02:48:36 GMT 2001


In a message dated 8/20/2001 9:23:51 PM Eastern Daylight Time, 
Sealand at clarityconnect.com writes:

> Are you aware that the 747 ECM alternates injector firings?  I'm sure
>  that you have very poor fuel distribution with the 747 ECM.  It would be
>  much better to stay with the 4 cyl ECM.
>  
>  Scot Sealander

I agree. What is probably happening is that only two of your cylinders are 
getting a fuel shot and the other two are just tagging along. This assumes 
you are only using one injector driver. This also assumes that you have the 
ECM bin set up for 4 cylinders, which may not even be an option in the 7747 
bin. What is more likely happening is the ECM is trying to control the engine 
as a 6 (or 8) cylinder, and therefore the alternate injector firings are 
hitting each cylinder just in a very intermittent way. In other words, with a 
V8 bin, the ECM thinks the engine is turning only 500 RPM when it is really 
turning 1000 RPM. This would also put you in a leaner part of the fuel table.

The bottom line is that a 7747 on a 4 cylinder is a misapplication. What you 
are running into is that demand for reverse engineered (hacked) 4 cylinder 
ECMs is very sparse. You may have to do your own hacking of a known 4 
cylinder ECM, such as the 165 you already have. Maybe you ask the list for 
other hacked 4 cylinder ECM applications. JW
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