DIY_EFI Digest V5 #27

[Bruce Plecan]

Bring cash.
Grumpy

| > How does the hot exhaust gas cool the fresh charge.... Or have I got
this
| > wrong and you mean that the exhaust gas isn't heating the cool intake
| > charge and the cold intake charge is causing the detonation????
|
| Believe it or not... the gasses coming from the EGR have had enough time
to
| cool enough so that the portion of exhaust temp re-entering the intake
port
| is cooler than the intake manifold.  (Thus, EGR valve only opens when the
| engine is at "operating temperature".)  But if engine knock is only
apparent
| at something other than high engine loads and/or speeds... I'd be willing
to
| bet dimes to dollars it's due to the EGR being disconnected or inoperable.
|
| Scott
|